/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/safe007_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:44:35,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:44:35,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:44:35,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:44:35,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:44:35,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:44:35,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:44:35,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:44:35,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:44:35,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:44:35,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:44:35,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:44:35,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:44:35,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:44:35,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:44:35,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:44:35,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:44:35,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:44:35,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:44:35,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:44:35,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:44:35,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:44:35,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:44:35,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:44:35,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:44:35,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:44:35,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:44:35,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:44:35,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:44:35,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:44:35,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:44:35,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:44:35,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:44:35,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:44:35,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:44:35,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:44:35,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:44:35,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:44:35,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:44:35,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:44:35,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:44:35,900 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 17:44:35,933 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:44:35,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:44:35,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:44:35,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:44:35,936 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:44:35,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:44:35,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:44:35,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:44:35,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:44:35,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:44:35,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:44:35,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:44:35,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:44:35,939 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:44:35,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:44:35,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:44:35,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:44:35,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:44:35,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:44:35,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:44:35,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:44:35,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:44:35,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:44:35,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:44:35,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:44:35,941 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:44:35,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:44:35,941 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:44:35,942 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:44:35,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:44:36,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:44:36,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:44:36,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:44:36,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:44:36,249 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:44:36,250 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.opt.i [2020-10-09 17:44:36,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69cea9d8c/c97bbc16a8934b57875e2f60a1f6eb49/FLAG9b147e66b [2020-10-09 17:44:36,841 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:44:36,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_pso.opt.i [2020-10-09 17:44:36,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69cea9d8c/c97bbc16a8934b57875e2f60a1f6eb49/FLAG9b147e66b [2020-10-09 17:44:37,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69cea9d8c/c97bbc16a8934b57875e2f60a1f6eb49 [2020-10-09 17:44:37,110 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:44:37,112 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:44:37,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:44:37,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:44:37,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:44:37,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:44:37" (1/1) ... [2020-10-09 17:44:37,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fedfef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37, skipping insertion in model container [2020-10-09 17:44:37,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:44:37" (1/1) ... [2020-10-09 17:44:37,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:44:37,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:44:37,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:44:37,570 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:44:37,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:44:37,817 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:44:37,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37 WrapperNode [2020-10-09 17:44:37,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:44:37,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:44:37,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:44:37,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:44:37,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37" (1/1) ... [2020-10-09 17:44:37,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37" (1/1) ... [2020-10-09 17:44:37,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:44:37,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:44:37,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:44:37,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:44:37,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37" (1/1) ... [2020-10-09 17:44:37,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37" (1/1) ... [2020-10-09 17:44:37,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37" (1/1) ... [2020-10-09 17:44:37,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37" (1/1) ... [2020-10-09 17:44:37,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37" (1/1) ... [2020-10-09 17:44:37,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37" (1/1) ... [2020-10-09 17:44:37,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37" (1/1) ... [2020-10-09 17:44:37,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:44:37,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:44:37,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:44:37,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:44:37,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37" (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 17:44:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:44:37,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:44:37,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:44:37,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:44:37,970 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:44:37,970 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:44:37,970 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:44:37,970 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:44:37,971 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:44:37,971 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:44:37,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:44:37,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:44:37,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:44:37,973 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 17:44:38,288 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:44:38,288 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:44:38,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:44:38 BoogieIcfgContainer [2020-10-09 17:44:38,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:44:38,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:44:38,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:44:38,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:44:38,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:44:37" (1/3) ... [2020-10-09 17:44:38,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9af1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:44:38, skipping insertion in model container [2020-10-09 17:44:38,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:37" (2/3) ... [2020-10-09 17:44:38,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9af1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:44:38, skipping insertion in model container [2020-10-09 17:44:38,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:44:38" (3/3) ... [2020-10-09 17:44:38,299 INFO L111 eAbstractionObserver]: Analyzing ICFG safe007_pso.opt.i [2020-10-09 17:44:38,310 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:44:38,317 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:44:38,318 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:44:38,371 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,371 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,372 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,372 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,378 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,378 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,378 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,379 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,379 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,379 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,380 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,380 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,382 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,382 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,383 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,383 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,383 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,384 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,387 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,388 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,388 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,389 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,400 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,400 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,402 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,402 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,413 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,414 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,414 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,414 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:38,440 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 17:44:38,462 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:44:38,462 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:44:38,462 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:44:38,462 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:44:38,462 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:44:38,462 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:44:38,463 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:44:38,463 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:44:38,475 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 71 transitions, 157 flow [2020-10-09 17:44:38,518 INFO L129 PetriNetUnfolder]: 2/68 cut-off events. [2020-10-09 17:44:38,518 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:44:38,523 INFO L80 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 68 events. 2/68 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. 0/65 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-10-09 17:44:38,523 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 71 transitions, 157 flow [2020-10-09 17:44:38,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 57 transitions, 123 flow [2020-10-09 17:44:38,548 INFO L129 PetriNetUnfolder]: 1/56 cut-off events. [2020-10-09 17:44:38,548 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:44:38,549 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:44:38,550 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] [2020-10-09 17:44:38,550 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:44:38,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:44:38,556 INFO L82 PathProgramCache]: Analyzing trace with hash 642340523, now seen corresponding path program 1 times [2020-10-09 17:44:38,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:44:38,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218081299] [2020-10-09 17:44:38,569 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 17:44:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:44:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:44:38,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:44:38,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:44:38,814 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 17:44:38,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:44:38,881 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 17:44:38,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218081299] [2020-10-09 17:44:38,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:44:38,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:44:38,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273210062] [2020-10-09 17:44:38,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:44:38,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:44:38,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:44:38,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:44:39,085 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 71 [2020-10-09 17:44:39,087 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 123 flow. Second operand 8 states. [2020-10-09 17:44:39,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:44:39,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 71 [2020-10-09 17:44:39,089 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:44:39,210 INFO L129 PetriNetUnfolder]: 3/79 cut-off events. [2020-10-09 17:44:39,210 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:44:39,211 INFO L80 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 79 events. 3/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 121 event pairs, 0 based on Foata normal form. 4/82 useless extension candidates. Maximal degree in co-relation 83. Up to 7 conditions per place. [2020-10-09 17:44:39,212 INFO L132 encePairwiseOnDemand]: 64/71 looper letters, 6 selfloop transitions, 2 changer transitions 11/66 dead transitions. [2020-10-09 17:44:39,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 177 flow [2020-10-09 17:44:39,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:44:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:44:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 571 transitions. [2020-10-09 17:44:39,231 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8935837245696401 [2020-10-09 17:44:39,232 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 571 transitions. [2020-10-09 17:44:39,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 571 transitions. [2020-10-09 17:44:39,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:44:39,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 571 transitions. [2020-10-09 17:44:39,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:44:39,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:44:39,252 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:44:39,254 INFO L185 Difference]: Start difference. First operand has 66 places, 57 transitions, 123 flow. Second operand 9 states and 571 transitions. [2020-10-09 17:44:39,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 177 flow [2020-10-09 17:44:39,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 17:44:39,264 INFO L241 Difference]: Finished difference. Result has 78 places, 55 transitions, 136 flow [2020-10-09 17:44:39,267 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=136, PETRI_PLACES=78, PETRI_TRANSITIONS=55} [2020-10-09 17:44:39,268 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2020-10-09 17:44:39,268 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 55 transitions, 136 flow [2020-10-09 17:44:39,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:44:39,268 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:44:39,268 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 17:44:39,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:44:39,480 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:44:39,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:44:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1160241260, now seen corresponding path program 1 times [2020-10-09 17:44:39,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:44:39,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750751857] [2020-10-09 17:44:39,483 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 17:44:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:44:39,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:44:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:44:39,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:44:39,628 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 17:44:39,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:44:39,706 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 17:44:39,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750751857] [2020-10-09 17:44:39,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:44:39,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:44:39,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461661364] [2020-10-09 17:44:39,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:44:39,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:44:39,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:44:39,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:44:39,898 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 71 [2020-10-09 17:44:39,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 55 transitions, 136 flow. Second operand 8 states. [2020-10-09 17:44:39,899 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:44:39,899 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 71 [2020-10-09 17:44:39,899 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:44:40,003 INFO L129 PetriNetUnfolder]: 3/78 cut-off events. [2020-10-09 17:44:40,004 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-09 17:44:40,005 INFO L80 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 78 events. 3/78 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 117 event pairs, 0 based on Foata normal form. 2/80 useless extension candidates. Maximal degree in co-relation 117. Up to 7 conditions per place. [2020-10-09 17:44:40,006 INFO L132 encePairwiseOnDemand]: 65/71 looper letters, 6 selfloop transitions, 2 changer transitions 10/65 dead transitions. [2020-10-09 17:44:40,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 210 flow [2020-10-09 17:44:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:44:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:44:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 569 transitions. [2020-10-09 17:44:40,010 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8904538341158059 [2020-10-09 17:44:40,010 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 569 transitions. [2020-10-09 17:44:40,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 569 transitions. [2020-10-09 17:44:40,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:44:40,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 569 transitions. [2020-10-09 17:44:40,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:44:40,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:44:40,014 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:44:40,015 INFO L185 Difference]: Start difference. First operand has 78 places, 55 transitions, 136 flow. Second operand 9 states and 569 transitions. [2020-10-09 17:44:40,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 210 flow [2020-10-09 17:44:40,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 178 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:44:40,019 INFO L241 Difference]: Finished difference. Result has 78 places, 55 transitions, 140 flow [2020-10-09 17:44:40,020 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=140, PETRI_PLACES=78, PETRI_TRANSITIONS=55} [2020-10-09 17:44:40,021 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2020-10-09 17:44:40,021 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 55 transitions, 140 flow [2020-10-09 17:44:40,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:44:40,021 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:44:40,021 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 17:44:40,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:44:40,241 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:44:40,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:44:40,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1372231315, now seen corresponding path program 1 times [2020-10-09 17:44:40,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:44:40,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616395472] [2020-10-09 17:44:40,244 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 17:44:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:44:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:44:40,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:44:40,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:44:40,357 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 17:44:40,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:44:40,400 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 17:44:40,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616395472] [2020-10-09 17:44:40,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:44:40,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:44:40,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034439320] [2020-10-09 17:44:40,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:44:40,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:44:40,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:44:40,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:44:40,534 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 71 [2020-10-09 17:44:40,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 55 transitions, 140 flow. Second operand 8 states. [2020-10-09 17:44:40,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:44:40,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 71 [2020-10-09 17:44:40,536 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:44:40,619 INFO L129 PetriNetUnfolder]: 3/78 cut-off events. [2020-10-09 17:44:40,619 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2020-10-09 17:44:40,620 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 78 events. 3/78 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 117 event pairs, 0 based on Foata normal form. 2/80 useless extension candidates. Maximal degree in co-relation 120. Up to 7 conditions per place. [2020-10-09 17:44:40,620 INFO L132 encePairwiseOnDemand]: 65/71 looper letters, 6 selfloop transitions, 2 changer transitions 10/65 dead transitions. [2020-10-09 17:44:40,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 65 transitions, 216 flow [2020-10-09 17:44:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:44:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:44:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 569 transitions. [2020-10-09 17:44:40,623 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8904538341158059 [2020-10-09 17:44:40,624 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 569 transitions. [2020-10-09 17:44:40,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 569 transitions. [2020-10-09 17:44:40,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:44:40,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 569 transitions. [2020-10-09 17:44:40,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:44:40,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:44:40,627 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:44:40,628 INFO L185 Difference]: Start difference. First operand has 78 places, 55 transitions, 140 flow. Second operand 9 states and 569 transitions. [2020-10-09 17:44:40,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 65 transitions, 216 flow [2020-10-09 17:44:40,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 65 transitions, 184 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:44:40,631 INFO L241 Difference]: Finished difference. Result has 79 places, 55 transitions, 144 flow [2020-10-09 17:44:40,632 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=144, PETRI_PLACES=79, PETRI_TRANSITIONS=55} [2020-10-09 17:44:40,632 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2020-10-09 17:44:40,632 INFO L481 AbstractCegarLoop]: Abstraction has has 79 places, 55 transitions, 144 flow [2020-10-09 17:44:40,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:44:40,632 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:44:40,633 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] [2020-10-09 17:44:40,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:44:40,850 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:44:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:44:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash -699810066, now seen corresponding path program 1 times [2020-10-09 17:44:40,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:44:40,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432027041] [2020-10-09 17:44:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:44:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:44:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:44:40,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:44:40,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:44:40,950 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 17:44:40,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:44:41,021 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 17:44:41,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432027041] [2020-10-09 17:44:41,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:44:41,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:44:41,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616536327] [2020-10-09 17:44:41,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:44:41,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:44:41,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:44:41,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:44:41,252 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 71 [2020-10-09 17:44:41,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 55 transitions, 144 flow. Second operand 9 states. [2020-10-09 17:44:41,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:44:41,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 71 [2020-10-09 17:44:41,254 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:44:41,377 INFO L129 PetriNetUnfolder]: 4/76 cut-off events. [2020-10-09 17:44:41,378 INFO L130 PetriNetUnfolder]: For 34/41 co-relation queries the response was YES. [2020-10-09 17:44:41,378 INFO L80 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 76 events. 4/76 cut-off events. For 34/41 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 2/78 useless extension candidates. Maximal degree in co-relation 131. Up to 7 conditions per place. [2020-10-09 17:44:41,379 INFO L132 encePairwiseOnDemand]: 63/71 looper letters, 6 selfloop transitions, 4 changer transitions 12/67 dead transitions. [2020-10-09 17:44:41,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 67 transitions, 243 flow [2020-10-09 17:44:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:44:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:44:41,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 614 transitions. [2020-10-09 17:44:41,387 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8647887323943662 [2020-10-09 17:44:41,387 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 614 transitions. [2020-10-09 17:44:41,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 614 transitions. [2020-10-09 17:44:41,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:44:41,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 614 transitions. [2020-10-09 17:44:41,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:44:41,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:44:41,390 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:44:41,390 INFO L185 Difference]: Start difference. First operand has 79 places, 55 transitions, 144 flow. Second operand 10 states and 614 transitions. [2020-10-09 17:44:41,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 67 transitions, 243 flow [2020-10-09 17:44:41,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 67 transitions, 209 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:44:41,395 INFO L241 Difference]: Finished difference. Result has 82 places, 55 transitions, 158 flow [2020-10-09 17:44:41,396 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=158, PETRI_PLACES=82, PETRI_TRANSITIONS=55} [2020-10-09 17:44:41,396 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2020-10-09 17:44:41,396 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 55 transitions, 158 flow [2020-10-09 17:44:41,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:44:41,396 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:44:41,397 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 17:44:41,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:44:41,609 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:44:41,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:44:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash 418548482, now seen corresponding path program 1 times [2020-10-09 17:44:41,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:44:41,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578003305] [2020-10-09 17:44:41,611 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 17:44:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:44:41,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:44:41,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:44:41,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:44:41,723 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 17:44:41,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:44:41,774 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 17:44:41,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578003305] [2020-10-09 17:44:41,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:44:41,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:44:41,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833479214] [2020-10-09 17:44:41,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:44:41,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:44:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:44:41,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:44:41,962 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 71 [2020-10-09 17:44:41,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 55 transitions, 158 flow. Second operand 9 states. [2020-10-09 17:44:41,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:44:41,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 71 [2020-10-09 17:44:41,963 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:44:42,081 INFO L129 PetriNetUnfolder]: 4/81 cut-off events. [2020-10-09 17:44:42,082 INFO L130 PetriNetUnfolder]: For 61/73 co-relation queries the response was YES. [2020-10-09 17:44:42,082 INFO L80 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 81 events. 4/81 cut-off events. For 61/73 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 3/83 useless extension candidates. Maximal degree in co-relation 151. Up to 7 conditions per place. [2020-10-09 17:44:42,083 INFO L132 encePairwiseOnDemand]: 63/71 looper letters, 6 selfloop transitions, 4 changer transitions 12/67 dead transitions. [2020-10-09 17:44:42,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 67 transitions, 263 flow [2020-10-09 17:44:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:44:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:44:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 614 transitions. [2020-10-09 17:44:42,086 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8647887323943662 [2020-10-09 17:44:42,086 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 614 transitions. [2020-10-09 17:44:42,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 614 transitions. [2020-10-09 17:44:42,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:44:42,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 614 transitions. [2020-10-09 17:44:42,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:44:42,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:44:42,091 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:44:42,091 INFO L185 Difference]: Start difference. First operand has 82 places, 55 transitions, 158 flow. Second operand 10 states and 614 transitions. [2020-10-09 17:44:42,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 67 transitions, 263 flow [2020-10-09 17:44:42,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 67 transitions, 213 flow, removed 20 selfloop flow, removed 10 redundant places. [2020-10-09 17:44:42,094 INFO L241 Difference]: Finished difference. Result has 83 places, 55 transitions, 162 flow [2020-10-09 17:44:42,095 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=162, PETRI_PLACES=83, PETRI_TRANSITIONS=55} [2020-10-09 17:44:42,095 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2020-10-09 17:44:42,095 INFO L481 AbstractCegarLoop]: Abstraction has has 83 places, 55 transitions, 162 flow [2020-10-09 17:44:42,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:44:42,095 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:44:42,096 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] [2020-10-09 17:44:42,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:44:42,310 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:44:42,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:44:42,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1916680376, now seen corresponding path program 1 times [2020-10-09 17:44:42,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:44:42,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204681618] [2020-10-09 17:44:42,311 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 17:44:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:44:42,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:44:42,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:44:42,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:44:42,410 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 17:44:42,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:44:42,455 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 17:44:42,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204681618] [2020-10-09 17:44:42,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:44:42,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:44:42,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856495630] [2020-10-09 17:44:42,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:44:42,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:44:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:44:42,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:44:42,624 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 71 [2020-10-09 17:44:42,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 55 transitions, 162 flow. Second operand 9 states. [2020-10-09 17:44:42,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:44:42,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 71 [2020-10-09 17:44:42,625 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:44:42,745 INFO L129 PetriNetUnfolder]: 4/61 cut-off events. [2020-10-09 17:44:42,745 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2020-10-09 17:44:42,746 INFO L80 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 61 events. 4/61 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 114. Up to 5 conditions per place. [2020-10-09 17:44:42,746 INFO L132 encePairwiseOnDemand]: 64/71 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2020-10-09 17:44:42,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 60 transitions, 218 flow [2020-10-09 17:44:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:44:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:44:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2020-10-09 17:44:42,750 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.856338028169014 [2020-10-09 17:44:42,750 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2020-10-09 17:44:42,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2020-10-09 17:44:42,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:44:42,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2020-10-09 17:44:42,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:44:42,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:44:42,755 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:44:42,755 INFO L185 Difference]: Start difference. First operand has 83 places, 55 transitions, 162 flow. Second operand 10 states and 608 transitions. [2020-10-09 17:44:42,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 60 transitions, 218 flow [2020-10-09 17:44:42,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 60 transitions, 178 flow, removed 14 selfloop flow, removed 9 redundant places. [2020-10-09 17:44:42,757 INFO L241 Difference]: Finished difference. Result has 75 places, 0 transitions, 0 flow [2020-10-09 17:44:42,758 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=75, PETRI_TRANSITIONS=0} [2020-10-09 17:44:42,758 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2020-10-09 17:44:42,758 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 0 transitions, 0 flow [2020-10-09 17:44:42,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:44:42,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:44:42,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:44:42 BasicIcfg [2020-10-09 17:44:42,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:44:42,979 INFO L168 Benchmark]: Toolchain (without parser) took 5866.85 ms. Allocated memory was 253.2 MB in the beginning and 442.5 MB in the end (delta: 189.3 MB). Free memory was 205.9 MB in the beginning and 217.2 MB in the end (delta: -11.4 MB). Peak memory consumption was 177.9 MB. Max. memory is 14.2 GB. [2020-10-09 17:44:42,982 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 253.2 MB. Free memory is still 227.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:44:42,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 705.08 ms. Allocated memory was 253.2 MB in the beginning and 343.4 MB in the end (delta: 90.2 MB). Free memory was 205.9 MB in the beginning and 308.0 MB in the end (delta: -102.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 14.2 GB. [2020-10-09 17:44:42,991 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.73 ms. Allocated memory is still 343.4 MB. Free memory was 308.0 MB in the beginning and 304.4 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 14.2 GB. [2020-10-09 17:44:42,992 INFO L168 Benchmark]: Boogie Preprocessor took 26.66 ms. Allocated memory is still 343.4 MB. Free memory is still 304.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:44:42,992 INFO L168 Benchmark]: RCFGBuilder took 397.19 ms. Allocated memory is still 343.4 MB. Free memory was 304.4 MB in the beginning and 279.4 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 14.2 GB. [2020-10-09 17:44:42,993 INFO L168 Benchmark]: TraceAbstraction took 4685.05 ms. Allocated memory was 343.4 MB in the beginning and 442.5 MB in the end (delta: 99.1 MB). Free memory was 279.4 MB in the beginning and 217.2 MB in the end (delta: 62.2 MB). Peak memory consumption was 161.3 MB. Max. memory is 14.2 GB. [2020-10-09 17:44:43,005 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 253.2 MB. Free memory is still 227.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 705.08 ms. Allocated memory was 253.2 MB in the beginning and 343.4 MB in the end (delta: 90.2 MB). Free memory was 205.9 MB in the beginning and 308.0 MB in the end (delta: -102.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 47.73 ms. Allocated memory is still 343.4 MB. Free memory was 308.0 MB in the beginning and 304.4 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.66 ms. Allocated memory is still 343.4 MB. Free memory is still 304.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 397.19 ms. Allocated memory is still 343.4 MB. Free memory was 304.4 MB in the beginning and 279.4 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 4685.05 ms. Allocated memory was 343.4 MB in the beginning and 442.5 MB in the end (delta: 99.1 MB). Free memory was 279.4 MB in the beginning and 217.2 MB in the end (delta: 62.2 MB). Peak memory consumption was 161.3 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, 70 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: 4.5s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 228 SDslu, 474 SDs, 0 SdLazy, 339 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 522 GetRequests, 432 SyntacticMatches, 15 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred 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, 0.7s InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 486 ConstructedInterpolants, 0 QuantifiedInterpolants, 56612 SizeOfPredicates, 51 NumberOfNonLiveVariables, 642 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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...