/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/safe006_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:44:13,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:44:13,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:44:13,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:44:13,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:44:13,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:44:13,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:44:13,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:44:13,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:44:13,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:44:13,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:44:13,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:44:13,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:44:13,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:44:13,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:44:13,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:44:13,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:44:13,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:44:13,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:44:13,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:44:13,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:44:13,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:44:13,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:44:13,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:44:13,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:44:13,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:44:13,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:44:13,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:44:13,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:44:13,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:44:13,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:44:13,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:44:13,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:44:13,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:44:13,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:44:13,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:44:13,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:44:13,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:44:13,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:44:13,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:44:13,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:44:13,432 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 17:44:13,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:44:13,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:44:13,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:44:13,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:44:13,454 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:44:13,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:44:13,455 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:44:13,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:44:13,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:44:13,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:44:13,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:44:13,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:44:13,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:44:13,456 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:44:13,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:44:13,456 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:44:13,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:44:13,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:44:13,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:44:13,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:44:13,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:44:13,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:44:13,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:44:13,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:44:13,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:44:13,458 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:44:13,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:44:13,459 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:44:13,459 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:44:13,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:44:13,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:44:13,764 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:44:13,767 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:44:13,769 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:44:13,769 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:44:13,770 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe006_tso.opt.i [2020-10-09 17:44:13,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017828747/08c1433ba0d2469190065e08b765d0c1/FLAG93b0b47fc [2020-10-09 17:44:14,315 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:44:14,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe006_tso.opt.i [2020-10-09 17:44:14,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017828747/08c1433ba0d2469190065e08b765d0c1/FLAG93b0b47fc [2020-10-09 17:44:14,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017828747/08c1433ba0d2469190065e08b765d0c1 [2020-10-09 17:44:14,647 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:44:14,649 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:44:14,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:44:14,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:44:14,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:44:14,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:44:14" (1/1) ... [2020-10-09 17:44:14,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@669bbf97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:14, skipping insertion in model container [2020-10-09 17:44:14,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:44:14" (1/1) ... [2020-10-09 17:44:14,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:44:14,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:44:15,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:44:15,253 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:44:15,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:44:15,388 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:44:15,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15 WrapperNode [2020-10-09 17:44:15,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:44:15,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:44:15,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:44:15,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:44:15,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15" (1/1) ... [2020-10-09 17:44:15,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15" (1/1) ... [2020-10-09 17:44:15,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:44:15,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:44:15,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:44:15,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:44:15,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15" (1/1) ... [2020-10-09 17:44:15,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15" (1/1) ... [2020-10-09 17:44:15,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15" (1/1) ... [2020-10-09 17:44:15,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15" (1/1) ... [2020-10-09 17:44:15,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15" (1/1) ... [2020-10-09 17:44:15,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15" (1/1) ... [2020-10-09 17:44:15,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15" (1/1) ... [2020-10-09 17:44:15,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:44:15,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:44:15,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:44:15,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:44:15,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15" (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 17:44:15,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:44:15,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:44:15,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:44:15,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:44:15,525 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:44:15,525 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:44:15,525 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:44:15,525 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:44:15,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:44:15,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:44:15,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:44:15,527 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 17:44:15,831 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:44:15,831 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:44:15,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:44:15 BoogieIcfgContainer [2020-10-09 17:44:15,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:44:15,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:44:15,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:44:15,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:44:15,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:44:14" (1/3) ... [2020-10-09 17:44:15,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2597c5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:44:15, skipping insertion in model container [2020-10-09 17:44:15,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:44:15" (2/3) ... [2020-10-09 17:44:15,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2597c5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:44:15, skipping insertion in model container [2020-10-09 17:44:15,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:44:15" (3/3) ... [2020-10-09 17:44:15,854 INFO L111 eAbstractionObserver]: Analyzing ICFG safe006_tso.opt.i [2020-10-09 17:44:15,867 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:44:15,874 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:44:15,875 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:44:15,900 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,900 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,901 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,901 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,902 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,902 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,902 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,903 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,903 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,903 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,904 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,904 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,907 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,908 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,908 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,908 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,914 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,914 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,915 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,915 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:44:15,933 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 17:44:15,954 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:44:15,955 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:44:15,955 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:44:15,955 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:44:15,955 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:44:15,956 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:44:15,956 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:44:15,956 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:44:15,969 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 56 transitions, 122 flow [2020-10-09 17:44:16,008 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2020-10-09 17:44:16,008 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:44:16,013 INFO L80 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 54 events. 2/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-09 17:44:16,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 56 transitions, 122 flow [2020-10-09 17:44:16,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 45 transitions, 96 flow [2020-10-09 17:44:16,036 INFO L129 PetriNetUnfolder]: 1/44 cut-off events. [2020-10-09 17:44:16,036 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:44:16,037 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:44:16,038 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] [2020-10-09 17:44:16,038 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:44:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:44:16,044 INFO L82 PathProgramCache]: Analyzing trace with hash 441942769, now seen corresponding path program 1 times [2020-10-09 17:44:16,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:44:16,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649279067] [2020-10-09 17:44:16,058 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 17:44:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:44:16,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:44:16,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:44:16,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:44:16,301 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 17:44:16,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:44:16,393 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 17:44:16,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649279067] [2020-10-09 17:44:16,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:44:16,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:44:16,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206068887] [2020-10-09 17:44:16,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:44:16,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:44:16,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:44:16,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:44:16,720 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 56 [2020-10-09 17:44:16,722 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 96 flow. Second operand 8 states. [2020-10-09 17:44:16,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:44:16,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 56 [2020-10-09 17:44:16,726 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:44:16,830 INFO L129 PetriNetUnfolder]: 3/59 cut-off events. [2020-10-09 17:44:16,830 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:44:16,831 INFO L80 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 59 events. 3/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 4/62 useless extension candidates. Maximal degree in co-relation 63. Up to 7 conditions per place. [2020-10-09 17:44:16,832 INFO L132 encePairwiseOnDemand]: 49/56 looper letters, 6 selfloop transitions, 2 changer transitions 11/54 dead transitions. [2020-10-09 17:44:16,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 54 transitions, 150 flow [2020-10-09 17:44:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:44:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:44:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 436 transitions. [2020-10-09 17:44:16,851 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8650793650793651 [2020-10-09 17:44:16,852 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 436 transitions. [2020-10-09 17:44:16,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 436 transitions. [2020-10-09 17:44:16,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:44:16,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 436 transitions. [2020-10-09 17:44:16,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:44:16,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:44:16,872 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:44:16,874 INFO L185 Difference]: Start difference. First operand has 51 places, 45 transitions, 96 flow. Second operand 9 states and 436 transitions. [2020-10-09 17:44:16,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 54 transitions, 150 flow [2020-10-09 17:44:16,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 17:44:16,884 INFO L241 Difference]: Finished difference. Result has 64 places, 43 transitions, 110 flow [2020-10-09 17:44:16,887 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=110, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2020-10-09 17:44:16,888 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2020-10-09 17:44:16,888 INFO L481 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 110 flow [2020-10-09 17:44:16,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:44:16,889 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:44:16,889 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] [2020-10-09 17:44:17,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:44:17,102 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:44:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:44:17,103 INFO L82 PathProgramCache]: Analyzing trace with hash 256262898, now seen corresponding path program 1 times [2020-10-09 17:44:17,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:44:17,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220681785] [2020-10-09 17:44:17,105 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 17:44:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:44:17,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:44:17,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:44:17,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:44:17,206 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 17:44:17,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:44:17,249 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 17:44:17,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220681785] [2020-10-09 17:44:17,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:44:17,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:44:17,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708575236] [2020-10-09 17:44:17,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:44:17,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:44:17,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:44:17,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:44:17,351 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 56 [2020-10-09 17:44:17,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 110 flow. Second operand 8 states. [2020-10-09 17:44:17,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:44:17,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 56 [2020-10-09 17:44:17,352 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:44:17,432 INFO L129 PetriNetUnfolder]: 3/58 cut-off events. [2020-10-09 17:44:17,432 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2020-10-09 17:44:17,433 INFO L80 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 58 events. 3/58 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 95. Up to 7 conditions per place. [2020-10-09 17:44:17,433 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 6 selfloop transitions, 2 changer transitions 10/53 dead transitions. [2020-10-09 17:44:17,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 184 flow [2020-10-09 17:44:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:44:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:44:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 434 transitions. [2020-10-09 17:44:17,437 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2020-10-09 17:44:17,437 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 434 transitions. [2020-10-09 17:44:17,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 434 transitions. [2020-10-09 17:44:17,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:44:17,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 434 transitions. [2020-10-09 17:44:17,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:44:17,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:44:17,443 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:44:17,443 INFO L185 Difference]: Start difference. First operand has 64 places, 43 transitions, 110 flow. Second operand 9 states and 434 transitions. [2020-10-09 17:44:17,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 184 flow [2020-10-09 17:44:17,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 53 transitions, 152 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:44:17,447 INFO L241 Difference]: Finished difference. Result has 64 places, 43 transitions, 114 flow [2020-10-09 17:44:17,447 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=114, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2020-10-09 17:44:17,448 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2020-10-09 17:44:17,448 INFO L481 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 114 flow [2020-10-09 17:44:17,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:44:17,448 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:44:17,448 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] [2020-10-09 17:44:17,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:44:17,660 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:44:17,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:44:17,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1419898419, now seen corresponding path program 1 times [2020-10-09 17:44:17,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:44:17,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365811873] [2020-10-09 17:44:17,663 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 17:44:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:44:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:44:17,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:44:17,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:44:17,761 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 17:44:17,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:44:17,811 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 17:44:17,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365811873] [2020-10-09 17:44:17,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:44:17,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:44:17,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482365777] [2020-10-09 17:44:17,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:44:17,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:44:17,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:44:17,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:44:17,975 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 56 [2020-10-09 17:44:17,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 114 flow. Second operand 9 states. [2020-10-09 17:44:17,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:44:17,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 56 [2020-10-09 17:44:17,976 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:44:18,097 INFO L129 PetriNetUnfolder]: 4/64 cut-off events. [2020-10-09 17:44:18,098 INFO L130 PetriNetUnfolder]: For 20/27 co-relation queries the response was YES. [2020-10-09 17:44:18,098 INFO L80 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 64 events. 4/64 cut-off events. For 20/27 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 104 event pairs, 0 based on Foata normal form. 2/65 useless extension candidates. Maximal degree in co-relation 112. Up to 7 conditions per place. [2020-10-09 17:44:18,099 INFO L132 encePairwiseOnDemand]: 48/56 looper letters, 6 selfloop transitions, 4 changer transitions 12/55 dead transitions. [2020-10-09 17:44:18,099 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 207 flow [2020-10-09 17:44:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:44:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:44:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 464 transitions. [2020-10-09 17:44:18,102 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2020-10-09 17:44:18,102 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 464 transitions. [2020-10-09 17:44:18,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 464 transitions. [2020-10-09 17:44:18,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:44:18,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 464 transitions. [2020-10-09 17:44:18,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:44:18,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:44:18,106 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:44:18,106 INFO L185 Difference]: Start difference. First operand has 64 places, 43 transitions, 114 flow. Second operand 10 states and 464 transitions. [2020-10-09 17:44:18,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 207 flow [2020-10-09 17:44:18,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 175 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:44:18,110 INFO L241 Difference]: Finished difference. Result has 67 places, 43 transitions, 128 flow [2020-10-09 17:44:18,110 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=128, PETRI_PLACES=67, PETRI_TRANSITIONS=43} [2020-10-09 17:44:18,110 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2020-10-09 17:44:18,111 INFO L481 AbstractCegarLoop]: Abstraction has has 67 places, 43 transitions, 128 flow [2020-10-09 17:44:18,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:44:18,111 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:44:18,111 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 17:44:18,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:44:18,323 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:44:18,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:44:18,324 INFO L82 PathProgramCache]: Analyzing trace with hash 444884423, now seen corresponding path program 1 times [2020-10-09 17:44:18,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:44:18,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909994672] [2020-10-09 17:44:18,326 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 17:44:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:44:18,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:44:18,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:44:18,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:44:18,430 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 17:44:18,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:44:18,471 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 17:44:18,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909994672] [2020-10-09 17:44:18,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:44:18,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:44:18,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300099040] [2020-10-09 17:44:18,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:44:18,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:44:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:44:18,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:44:18,595 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 56 [2020-10-09 17:44:18,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 43 transitions, 128 flow. Second operand 9 states. [2020-10-09 17:44:18,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:44:18,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 56 [2020-10-09 17:44:18,596 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:44:18,711 INFO L129 PetriNetUnfolder]: 4/49 cut-off events. [2020-10-09 17:44:18,711 INFO L130 PetriNetUnfolder]: For 33/36 co-relation queries the response was YES. [2020-10-09 17:44:18,711 INFO L80 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 49 events. 4/49 cut-off events. For 33/36 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 95. Up to 5 conditions per place. [2020-10-09 17:44:18,712 INFO L132 encePairwiseOnDemand]: 49/56 looper letters, 0 selfloop transitions, 0 changer transitions 48/48 dead transitions. [2020-10-09 17:44:18,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 48 transitions, 182 flow [2020-10-09 17:44:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:44:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:44:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 458 transitions. [2020-10-09 17:44:18,715 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8178571428571428 [2020-10-09 17:44:18,715 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 458 transitions. [2020-10-09 17:44:18,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 458 transitions. [2020-10-09 17:44:18,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:44:18,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 458 transitions. [2020-10-09 17:44:18,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:44:18,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:44:18,727 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:44:18,728 INFO L185 Difference]: Start difference. First operand has 67 places, 43 transitions, 128 flow. Second operand 10 states and 458 transitions. [2020-10-09 17:44:18,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 48 transitions, 182 flow [2020-10-09 17:44:18,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 48 transitions, 142 flow, removed 14 selfloop flow, removed 9 redundant places. [2020-10-09 17:44:18,731 INFO L241 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2020-10-09 17:44:18,731 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2020-10-09 17:44:18,731 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2020-10-09 17:44:18,732 INFO L481 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2020-10-09 17:44:18,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:44:18,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:44:18,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:44:18 BasicIcfg [2020-10-09 17:44:18,952 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:44:18,954 INFO L168 Benchmark]: Toolchain (without parser) took 4304.88 ms. Allocated memory was 249.6 MB in the beginning and 370.7 MB in the end (delta: 121.1 MB). Free memory was 203.4 MB in the beginning and 290.2 MB in the end (delta: -86.8 MB). Peak memory consumption was 34.3 MB. Max. memory is 14.2 GB. [2020-10-09 17:44:18,955 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 249.6 MB. Free memory is still 225.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:44:18,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 739.26 ms. Allocated memory was 249.6 MB in the beginning and 309.3 MB in the end (delta: 59.8 MB). Free memory was 203.4 MB in the beginning and 260.9 MB in the end (delta: -57.5 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. [2020-10-09 17:44:18,957 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.59 ms. Allocated memory is still 309.3 MB. Free memory was 260.9 MB in the beginning and 258.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:44:18,957 INFO L168 Benchmark]: Boogie Preprocessor took 25.52 ms. Allocated memory is still 309.3 MB. Free memory is still 258.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:44:18,958 INFO L168 Benchmark]: RCFGBuilder took 370.36 ms. Allocated memory is still 309.3 MB. Free memory was 258.4 MB in the beginning and 236.6 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:44:18,959 INFO L168 Benchmark]: TraceAbstraction took 3117.30 ms. Allocated memory was 309.3 MB in the beginning and 370.7 MB in the end (delta: 61.3 MB). Free memory was 236.6 MB in the beginning and 290.2 MB in the end (delta: -53.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.2 GB. [2020-10-09 17:44:18,963 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 249.6 MB. Free memory is still 225.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 739.26 ms. Allocated memory was 249.6 MB in the beginning and 309.3 MB in the end (delta: 59.8 MB). Free memory was 203.4 MB in the beginning and 260.9 MB in the end (delta: -57.5 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 47.59 ms. Allocated memory is still 309.3 MB. Free memory was 260.9 MB in the beginning and 258.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 25.52 ms. Allocated memory is still 309.3 MB. Free memory is still 258.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 370.36 ms. Allocated memory is still 309.3 MB. Free memory was 258.4 MB in the beginning and 236.6 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 3117.30 ms. Allocated memory was 309.3 MB in the beginning and 370.7 MB in the end (delta: 61.3 MB). Free memory was 236.6 MB in the beginning and 290.2 MB in the end (delta: -53.6 MB). Peak memory consumption was 7.7 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 3 procedures, 55 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: 2.9s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 176 SDslu, 261 SDs, 0 SdLazy, 223 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 286 GetRequests, 226 SyntacticMatches, 10 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=3, 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, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 23985 SizeOfPredicates, 26 NumberOfNonLiveVariables, 328 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...