/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-wmm/safe025_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:53:19,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:53:19,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:53:19,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:53:19,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:53:19,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:53:19,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:53:19,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:53:19,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:53:19,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:53:19,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:53:19,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:53:19,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:53:19,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:53:19,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:53:19,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:53:19,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:53:19,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:53:19,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:53:19,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:53:19,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:53:19,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:53:19,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:53:19,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:53:19,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 17:53:19,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:53:19,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:53:19,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:53:19,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:53:19,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:53:19,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:53:19,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:53:19,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:53:19,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:53:19,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:53:19,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:53:19,966 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 17:53:19,995 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:53:19,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:53:19,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:53:19,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:53:19,997 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:53:19,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:53:19,997 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:53:19,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:53:19,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:53:19,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:53:19,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:53:19,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:53:19,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:53:19,999 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:53:19,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:53:19,999 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:53:19,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:53:20,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:53:20,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:53:20,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:53:20,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:53:20,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:53:20,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:53:20,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:53:20,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:53:20,001 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:53:20,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:53:20,002 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:53:20,002 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:53:20,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:53:20,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:53:20,324 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:53:20,327 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:53:20,328 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:53:20,329 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:53:20,329 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.opt.i [2020-10-09 17:53:20,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ed0ab48/922870df35cb4bb3af0a0ceedeb827d3/FLAGde83485a4 [2020-10-09 17:53:20,897 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:53:20,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.opt.i [2020-10-09 17:53:20,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ed0ab48/922870df35cb4bb3af0a0ceedeb827d3/FLAGde83485a4 [2020-10-09 17:53:21,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ed0ab48/922870df35cb4bb3af0a0ceedeb827d3 [2020-10-09 17:53:21,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:53:21,168 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:53:21,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:53:21,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:53:21,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:53:21,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:53:21" (1/1) ... [2020-10-09 17:53:21,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a1cbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21, skipping insertion in model container [2020-10-09 17:53:21,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:53:21" (1/1) ... [2020-10-09 17:53:21,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:53:21,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:53:21,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:53:21,691 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:53:21,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:53:21,852 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:53:21,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21 WrapperNode [2020-10-09 17:53:21,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:53:21,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:53:21,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:53:21,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:53:21,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21" (1/1) ... [2020-10-09 17:53:21,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21" (1/1) ... [2020-10-09 17:53:21,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:53:21,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:53:21,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:53:21,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:53:21,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21" (1/1) ... [2020-10-09 17:53:21,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21" (1/1) ... [2020-10-09 17:53:21,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21" (1/1) ... [2020-10-09 17:53:21,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21" (1/1) ... [2020-10-09 17:53:21,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21" (1/1) ... [2020-10-09 17:53:21,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21" (1/1) ... [2020-10-09 17:53:21,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21" (1/1) ... [2020-10-09 17:53:21,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:53:21,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:53:21,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:53:21,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:53:21,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21" (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 17:53:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:53:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:53:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:53:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:53:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:53:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:53:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:53:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:53:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:53:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:53:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:53:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:53:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:53:22,005 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 17:53:22,345 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:53:22,345 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:53:22,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:53:22 BoogieIcfgContainer [2020-10-09 17:53:22,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:53:22,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:53:22,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:53:22,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:53:22,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:53:21" (1/3) ... [2020-10-09 17:53:22,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdf7a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:53:22, skipping insertion in model container [2020-10-09 17:53:22,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:53:21" (2/3) ... [2020-10-09 17:53:22,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdf7a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:53:22, skipping insertion in model container [2020-10-09 17:53:22,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:53:22" (3/3) ... [2020-10-09 17:53:22,355 INFO L111 eAbstractionObserver]: Analyzing ICFG safe025_pso.opt.i [2020-10-09 17:53:22,365 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:53:22,372 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:53:22,373 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:53:22,398 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,398 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,398 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,399 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,400 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,400 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,401 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,401 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,401 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,401 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,402 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,402 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,402 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,402 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,403 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,403 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,403 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,403 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,407 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,407 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,408 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,408 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,415 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,415 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,416 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,416 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,418 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,419 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,419 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,419 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:53:22,437 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 17:53:22,455 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:53:22,456 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:53:22,456 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:53:22,456 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:53:22,456 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:53:22,456 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:53:22,456 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:53:22,456 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:53:22,468 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:53:22,510 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-10-09 17:53:22,510 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:53:22,520 INFO L80 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 67 events. 2/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-10-09 17:53:22,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:53:22,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 121 flow [2020-10-09 17:53:22,547 INFO L129 PetriNetUnfolder]: 1/55 cut-off events. [2020-10-09 17:53:22,547 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:53:22,547 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:53:22,551 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, 1, 1, 1, 1, 1, 1] [2020-10-09 17:53:22,552 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:53:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:53:22,560 INFO L82 PathProgramCache]: Analyzing trace with hash -2081382383, now seen corresponding path program 1 times [2020-10-09 17:53:22,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:53:22,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270332564] [2020-10-09 17:53:22,575 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 17:53:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:53:22,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:53:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:53:22,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:53:22,820 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 17:53:22,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:53:22,892 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 17:53:22,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270332564] [2020-10-09 17:53:22,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:53:22,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:53:22,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29619173] [2020-10-09 17:53:22,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:53:22,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:53:22,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:53:22,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:53:23,298 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 70 [2020-10-09 17:53:23,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 121 flow. Second operand 8 states. [2020-10-09 17:53:23,301 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:53:23,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 70 [2020-10-09 17:53:23,303 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:53:23,450 INFO L129 PetriNetUnfolder]: 7/83 cut-off events. [2020-10-09 17:53:23,451 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:53:23,452 INFO L80 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 83 events. 7/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 6/88 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2020-10-09 17:53:23,453 INFO L132 encePairwiseOnDemand]: 62/70 looper letters, 6 selfloop transitions, 3 changer transitions 18/72 dead transitions. [2020-10-09 17:53:23,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 72 transitions, 205 flow [2020-10-09 17:53:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:53:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:53:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 799 transitions. [2020-10-09 17:53:23,475 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.878021978021978 [2020-10-09 17:53:23,476 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 799 transitions. [2020-10-09 17:53:23,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 799 transitions. [2020-10-09 17:53:23,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:53:23,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 799 transitions. [2020-10-09 17:53:23,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:53:23,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:53:23,497 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:53:23,499 INFO L185 Difference]: Start difference. First operand has 65 places, 56 transitions, 121 flow. Second operand 13 states and 799 transitions. [2020-10-09 17:53:23,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 72 transitions, 205 flow [2020-10-09 17:53:23,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 17:53:23,509 INFO L241 Difference]: Finished difference. Result has 85 places, 54 transitions, 146 flow [2020-10-09 17:53:23,512 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=146, PETRI_PLACES=85, PETRI_TRANSITIONS=54} [2020-10-09 17:53:23,513 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2020-10-09 17:53:23,513 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 54 transitions, 146 flow [2020-10-09 17:53:23,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:53:23,514 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:53:23,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:53:23,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:53:23,736 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:53:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:53:23,736 INFO L82 PathProgramCache]: Analyzing trace with hash 129834660, now seen corresponding path program 1 times [2020-10-09 17:53:23,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:53:23,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289602290] [2020-10-09 17:53:23,739 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 17:53:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:53:23,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:53:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:53:23,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:53:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:53:23,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:53:23,893 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 17:53:23,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289602290] [2020-10-09 17:53:23,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:53:23,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:53:23,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339520450] [2020-10-09 17:53:23,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:53:23,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:53:23,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:53:23,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:53:24,032 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 70 [2020-10-09 17:53:24,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 54 transitions, 146 flow. Second operand 8 states. [2020-10-09 17:53:24,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:53:24,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 70 [2020-10-09 17:53:24,033 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:53:24,131 INFO L129 PetriNetUnfolder]: 3/69 cut-off events. [2020-10-09 17:53:24,132 INFO L130 PetriNetUnfolder]: For 40/42 co-relation queries the response was YES. [2020-10-09 17:53:24,133 INFO L80 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 69 events. 3/69 cut-off events. For 40/42 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 2/71 useless extension candidates. Maximal degree in co-relation 118. Up to 7 conditions per place. [2020-10-09 17:53:24,134 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 6 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2020-10-09 17:53:24,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 64 transitions, 230 flow [2020-10-09 17:53:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:53:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:53:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 560 transitions. [2020-10-09 17:53:24,139 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2020-10-09 17:53:24,139 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 560 transitions. [2020-10-09 17:53:24,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 560 transitions. [2020-10-09 17:53:24,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:53:24,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 560 transitions. [2020-10-09 17:53:24,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:53:24,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:53:24,144 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:53:24,144 INFO L185 Difference]: Start difference. First operand has 85 places, 54 transitions, 146 flow. Second operand 9 states and 560 transitions. [2020-10-09 17:53:24,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 64 transitions, 230 flow [2020-10-09 17:53:24,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 64 transitions, 182 flow, removed 21 selfloop flow, removed 12 redundant places. [2020-10-09 17:53:24,148 INFO L241 Difference]: Finished difference. Result has 78 places, 54 transitions, 142 flow [2020-10-09 17:53:24,148 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=142, PETRI_PLACES=78, PETRI_TRANSITIONS=54} [2020-10-09 17:53:24,149 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2020-10-09 17:53:24,149 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 54 transitions, 142 flow [2020-10-09 17:53:24,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:53:24,150 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:53:24,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:53:24,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:53:24,361 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:53:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:53:24,362 INFO L82 PathProgramCache]: Analyzing trace with hash -220298001, now seen corresponding path program 1 times [2020-10-09 17:53:24,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:53:24,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525184257] [2020-10-09 17:53:24,363 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 17:53:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:53:24,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:53:24,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:53:24,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:53:24,490 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 17:53:24,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:53:24,553 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 17:53:24,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525184257] [2020-10-09 17:53:24,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:53:24,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2020-10-09 17:53:24,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761394021] [2020-10-09 17:53:24,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:53:24,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:53:24,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:53:24,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:53:24,818 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:53:24,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 54 transitions, 142 flow. Second operand 10 states. [2020-10-09 17:53:24,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:53:24,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:53:24,819 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:53:24,953 INFO L129 PetriNetUnfolder]: 0/81 cut-off events. [2020-10-09 17:53:24,953 INFO L130 PetriNetUnfolder]: For 43/87 co-relation queries the response was YES. [2020-10-09 17:53:24,953 INFO L80 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 81 events. 0/81 cut-off events. For 43/87 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 183 event pairs, 0 based on Foata normal form. 5/86 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2020-10-09 17:53:24,954 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 6 selfloop transitions, 5 changer transitions 11/65 dead transitions. [2020-10-09 17:53:24,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 65 transitions, 243 flow [2020-10-09 17:53:24,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:53:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:53:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 765 transitions. [2020-10-09 17:53:24,958 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8406593406593407 [2020-10-09 17:53:24,958 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 765 transitions. [2020-10-09 17:53:24,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 765 transitions. [2020-10-09 17:53:24,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:53:24,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 765 transitions. [2020-10-09 17:53:24,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:53:24,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:53:24,962 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:53:24,963 INFO L185 Difference]: Start difference. First operand has 78 places, 54 transitions, 142 flow. Second operand 13 states and 765 transitions. [2020-10-09 17:53:24,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 65 transitions, 243 flow [2020-10-09 17:53:24,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 65 transitions, 207 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:53:24,966 INFO L241 Difference]: Finished difference. Result has 84 places, 54 transitions, 156 flow [2020-10-09 17:53:24,967 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=156, PETRI_PLACES=84, PETRI_TRANSITIONS=54} [2020-10-09 17:53:24,967 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2020-10-09 17:53:24,967 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 54 transitions, 156 flow [2020-10-09 17:53:24,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:53:24,967 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:53:24,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:53:25,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:53:25,187 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:53:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:53:25,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1888915201, now seen corresponding path program 2 times [2020-10-09 17:53:25,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:53:25,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508029871] [2020-10-09 17:53:25,190 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 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 17:53:25,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:53:25,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:53:25,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:53:25,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:53:25,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:53:25,279 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 17:53:25,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:53:25,317 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 17:53:25,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508029871] [2020-10-09 17:53:25,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:53:25,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:53:25,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145373872] [2020-10-09 17:53:25,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:53:25,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:53:25,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:53:25,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:53:25,423 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:53:25,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 54 transitions, 156 flow. Second operand 8 states. [2020-10-09 17:53:25,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:53:25,424 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:53:25,424 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:53:25,654 INFO L129 PetriNetUnfolder]: 64/223 cut-off events. [2020-10-09 17:53:25,654 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2020-10-09 17:53:25,659 INFO L80 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 223 events. 64/223 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 952 event pairs, 0 based on Foata normal form. 8/225 useless extension candidates. Maximal degree in co-relation 392. Up to 36 conditions per place. [2020-10-09 17:53:25,661 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 10 selfloop transitions, 9 changer transitions 29/92 dead transitions. [2020-10-09 17:53:25,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 92 transitions, 328 flow [2020-10-09 17:53:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:53:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:53:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 735 transitions. [2020-10-09 17:53:25,665 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.875 [2020-10-09 17:53:25,665 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 735 transitions. [2020-10-09 17:53:25,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 735 transitions. [2020-10-09 17:53:25,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:53:25,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 735 transitions. [2020-10-09 17:53:25,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:53:25,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:53:25,669 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:53:25,669 INFO L185 Difference]: Start difference. First operand has 84 places, 54 transitions, 156 flow. Second operand 12 states and 735 transitions. [2020-10-09 17:53:25,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 92 transitions, 328 flow [2020-10-09 17:53:25,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 92 transitions, 294 flow, removed 10 selfloop flow, removed 13 redundant places. [2020-10-09 17:53:25,675 INFO L241 Difference]: Finished difference. Result has 83 places, 60 transitions, 220 flow [2020-10-09 17:53:25,676 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=220, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2020-10-09 17:53:25,676 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 18 predicate places. [2020-10-09 17:53:25,676 INFO L481 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 220 flow [2020-10-09 17:53:25,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:53:25,676 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:53:25,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:53:25,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:53:25,889 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:53:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:53:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash 70597897, now seen corresponding path program 1 times [2020-10-09 17:53:25,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:53:25,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899618781] [2020-10-09 17:53:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 17:53:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:53:25,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:53:25,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:53:25,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:53:25,990 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 17:53:25,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:53:26,029 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 17:53:26,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899618781] [2020-10-09 17:53:26,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:53:26,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:53:26,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524282830] [2020-10-09 17:53:26,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:53:26,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:53:26,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:53:26,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:53:26,102 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:53:26,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 220 flow. Second operand 10 states. [2020-10-09 17:53:26,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:53:26,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:53:26,103 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:53:26,284 INFO L129 PetriNetUnfolder]: 16/100 cut-off events. [2020-10-09 17:53:26,284 INFO L130 PetriNetUnfolder]: For 361/386 co-relation queries the response was YES. [2020-10-09 17:53:26,285 INFO L80 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 100 events. 16/100 cut-off events. For 361/386 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 211 event pairs, 0 based on Foata normal form. 14/113 useless extension candidates. Maximal degree in co-relation 295. Up to 27 conditions per place. [2020-10-09 17:53:26,286 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 4 selfloop transitions, 12 changer transitions 13/73 dead transitions. [2020-10-09 17:53:26,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 73 transitions, 403 flow [2020-10-09 17:53:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 17:53:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-09 17:53:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 658 transitions. [2020-10-09 17:53:26,289 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8545454545454545 [2020-10-09 17:53:26,289 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 658 transitions. [2020-10-09 17:53:26,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 658 transitions. [2020-10-09 17:53:26,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:53:26,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 658 transitions. [2020-10-09 17:53:26,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-09 17:53:26,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-09 17:53:26,295 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-09 17:53:26,295 INFO L185 Difference]: Start difference. First operand has 83 places, 60 transitions, 220 flow. Second operand 11 states and 658 transitions. [2020-10-09 17:53:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 73 transitions, 403 flow [2020-10-09 17:53:26,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 313 flow, removed 39 selfloop flow, removed 8 redundant places. [2020-10-09 17:53:26,301 INFO L241 Difference]: Finished difference. Result has 85 places, 60 transitions, 226 flow [2020-10-09 17:53:26,301 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=226, PETRI_PLACES=85, PETRI_TRANSITIONS=60} [2020-10-09 17:53:26,302 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2020-10-09 17:53:26,302 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 60 transitions, 226 flow [2020-10-09 17:53:26,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:53:26,302 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:53:26,302 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:53:26,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:53:26,514 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:53:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:53:26,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1988600493, now seen corresponding path program 1 times [2020-10-09 17:53:26,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:53:26,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225276093] [2020-10-09 17:53:26,516 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 17:53:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:53:26,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:53:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:53:26,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:53:26,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:53:26,629 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 17:53:26,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:53:26,669 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 17:53:26,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225276093] [2020-10-09 17:53:26,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:53:26,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2020-10-09 17:53:26,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919339768] [2020-10-09 17:53:26,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:53:26,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:53:26,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:53:26,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:53:26,938 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:53:26,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 60 transitions, 226 flow. Second operand 9 states. [2020-10-09 17:53:26,939 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:53:26,939 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:53:26,939 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:53:27,027 INFO L129 PetriNetUnfolder]: 11/115 cut-off events. [2020-10-09 17:53:27,027 INFO L130 PetriNetUnfolder]: For 114/124 co-relation queries the response was YES. [2020-10-09 17:53:27,028 INFO L80 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 115 events. 11/115 cut-off events. For 114/124 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 280 event pairs, 1 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 232. Up to 21 conditions per place. [2020-10-09 17:53:27,028 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 9 selfloop transitions, 2 changer transitions 5/65 dead transitions. [2020-10-09 17:53:27,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 65 transitions, 268 flow [2020-10-09 17:53:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 17:53:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-09 17:53:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 473 transitions. [2020-10-09 17:53:27,031 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8446428571428571 [2020-10-09 17:53:27,031 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 473 transitions. [2020-10-09 17:53:27,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 473 transitions. [2020-10-09 17:53:27,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:53:27,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 473 transitions. [2020-10-09 17:53:27,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-09 17:53:27,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-09 17:53:27,035 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-09 17:53:27,035 INFO L185 Difference]: Start difference. First operand has 85 places, 60 transitions, 226 flow. Second operand 8 states and 473 transitions. [2020-10-09 17:53:27,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 65 transitions, 268 flow [2020-10-09 17:53:27,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 65 transitions, 192 flow, removed 19 selfloop flow, removed 15 redundant places. [2020-10-09 17:53:27,040 INFO L241 Difference]: Finished difference. Result has 78 places, 60 transitions, 165 flow [2020-10-09 17:53:27,040 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2020-10-09 17:53:27,040 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2020-10-09 17:53:27,041 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 165 flow [2020-10-09 17:53:27,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:53:27,041 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:53:27,041 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:53:27,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:53:27,255 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:53:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:53:27,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1463406795, now seen corresponding path program 2 times [2020-10-09 17:53:27,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:53:27,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273267842] [2020-10-09 17:53:27,256 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 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-09 17:53:27,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:53:27,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:53:27,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:53:27,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:53:27,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:53:27,393 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 17:53:27,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:53:27,439 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 17:53:27,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273267842] [2020-10-09 17:53:27,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:53:27,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:53:27,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800053647] [2020-10-09 17:53:27,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:53:27,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:53:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:53:27,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:53:27,679 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:53:27,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 165 flow. Second operand 9 states. [2020-10-09 17:53:27,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:53:27,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:53:27,681 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:53:27,747 INFO L129 PetriNetUnfolder]: 11/124 cut-off events. [2020-10-09 17:53:27,748 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-10-09 17:53:27,748 INFO L80 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 124 events. 11/124 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 337 event pairs, 0 based on Foata normal form. 1/122 useless extension candidates. Maximal degree in co-relation 191. Up to 14 conditions per place. [2020-10-09 17:53:27,749 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 10 selfloop transitions, 1 changer transitions 6/66 dead transitions. [2020-10-09 17:53:27,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 66 transitions, 223 flow [2020-10-09 17:53:27,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:53:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:53:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2020-10-09 17:53:27,751 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8510204081632653 [2020-10-09 17:53:27,751 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2020-10-09 17:53:27,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2020-10-09 17:53:27,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:53:27,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2020-10-09 17:53:27,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:53:27,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:53:27,754 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:53:27,755 INFO L185 Difference]: Start difference. First operand has 78 places, 60 transitions, 165 flow. Second operand 7 states and 417 transitions. [2020-10-09 17:53:27,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 66 transitions, 223 flow [2020-10-09 17:53:27,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 66 transitions, 205 flow, removed 7 selfloop flow, removed 6 redundant places. [2020-10-09 17:53:27,757 INFO L241 Difference]: Finished difference. Result has 79 places, 60 transitions, 167 flow [2020-10-09 17:53:27,758 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=167, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2020-10-09 17:53:27,758 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 14 predicate places. [2020-10-09 17:53:27,759 INFO L481 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 167 flow [2020-10-09 17:53:27,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:53:27,759 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:53:27,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:53:27,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-09 17:53:27,974 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:53:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:53:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash 118028959, now seen corresponding path program 3 times [2020-10-09 17:53:27,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:53:27,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021623754] [2020-10-09 17:53:27,976 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 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-09 17:53:28,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-10-09 17:53:28,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:53:28,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:53:28,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:53:28,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:53:28,070 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 17:53:28,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:53:28,129 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 17:53:28,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021623754] [2020-10-09 17:53:28,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:53:28,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:53:28,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664310284] [2020-10-09 17:53:28,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:53:28,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:53:28,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:53:28,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:53:28,356 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2020-10-09 17:53:28,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 167 flow. Second operand 9 states. [2020-10-09 17:53:28,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:53:28,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2020-10-09 17:53:28,357 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:53:28,415 INFO L129 PetriNetUnfolder]: 7/92 cut-off events. [2020-10-09 17:53:28,415 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 17:53:28,416 INFO L80 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 92 events. 7/92 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 195 event pairs, 0 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 142. Up to 10 conditions per place. [2020-10-09 17:53:28,416 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 59/59 dead transitions. [2020-10-09 17:53:28,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 59 transitions, 183 flow [2020-10-09 17:53:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:53:28,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:53:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2020-10-09 17:53:28,418 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8510204081632653 [2020-10-09 17:53:28,419 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2020-10-09 17:53:28,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2020-10-09 17:53:28,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:53:28,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2020-10-09 17:53:28,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:53:28,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:53:28,422 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:53:28,422 INFO L185 Difference]: Start difference. First operand has 79 places, 60 transitions, 167 flow. Second operand 7 states and 417 transitions. [2020-10-09 17:53:28,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 59 transitions, 183 flow [2020-10-09 17:53:28,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 59 transitions, 173 flow, removed 4 selfloop flow, removed 5 redundant places. [2020-10-09 17:53:28,425 INFO L241 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2020-10-09 17:53:28,425 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2020-10-09 17:53:28,426 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2020-10-09 17:53:28,426 INFO L481 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2020-10-09 17:53:28,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:53:28,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-09 17:53:28,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:53:28 BasicIcfg [2020-10-09 17:53:28,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:53:28,646 INFO L168 Benchmark]: Toolchain (without parser) took 7477.03 ms. Allocated memory was 250.6 MB in the beginning and 431.5 MB in the end (delta: 180.9 MB). Free memory was 205.9 MB in the beginning and 342.6 MB in the end (delta: -136.7 MB). Peak memory consumption was 44.2 MB. Max. memory is 14.2 GB. [2020-10-09 17:53:28,646 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:53:28,647 INFO L168 Benchmark]: CACSL2BoogieTranslator took 683.93 ms. Allocated memory was 250.6 MB in the beginning and 312.0 MB in the end (delta: 61.3 MB). Free memory was 205.9 MB in the beginning and 264.8 MB in the end (delta: -58.8 MB). Peak memory consumption was 33.1 MB. Max. memory is 14.2 GB. [2020-10-09 17:53:28,648 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.86 ms. Allocated memory is still 312.0 MB. Free memory is still 264.8 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:53:28,649 INFO L168 Benchmark]: Boogie Preprocessor took 26.64 ms. Allocated memory is still 312.0 MB. Free memory was 264.8 MB in the beginning and 262.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:53:28,649 INFO L168 Benchmark]: RCFGBuilder took 418.93 ms. Allocated memory is still 312.0 MB. Free memory was 262.2 MB in the beginning and 240.1 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 14.2 GB. [2020-10-09 17:53:28,650 INFO L168 Benchmark]: TraceAbstraction took 6294.66 ms. Allocated memory was 312.0 MB in the beginning and 431.5 MB in the end (delta: 119.5 MB). Free memory was 240.1 MB in the beginning and 342.6 MB in the end (delta: -102.5 MB). Peak memory consumption was 17.0 MB. Max. memory is 14.2 GB. [2020-10-09 17:53:28,655 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 683.93 ms. Allocated memory was 250.6 MB in the beginning and 312.0 MB in the end (delta: 61.3 MB). Free memory was 205.9 MB in the beginning and 264.8 MB in the end (delta: -58.8 MB). Peak memory consumption was 33.1 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 47.86 ms. Allocated memory is still 312.0 MB. Free memory is still 264.8 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.64 ms. Allocated memory is still 312.0 MB. Free memory was 264.8 MB in the beginning and 262.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 418.93 ms. Allocated memory is still 312.0 MB. Free memory was 262.2 MB in the beginning and 240.1 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 14.2 GB. * TraceAbstraction took 6294.66 ms. Allocated memory was 312.0 MB in the beginning and 431.5 MB in the end (delta: 119.5 MB). Free memory was 240.1 MB in the beginning and 342.6 MB in the end (delta: -102.5 MB). Peak memory consumption was 17.0 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 69 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: SAFE, OverallTime: 6.1s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 316 SDslu, 685 SDs, 0 SdLazy, 618 SolverSat, 104 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 722 GetRequests, 602 SyntacticMatches, 17 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=226occurred in iteration=5, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 345 NumberOfCodeBlocks, 345 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 674 ConstructedInterpolants, 0 QuantifiedInterpolants, 79342 SizeOfPredicates, 68 NumberOfNonLiveVariables, 882 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...