/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/safe011_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:46:13,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:46:13,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:46:13,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:46:13,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:46:13,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:46:13,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:46:13,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:46:13,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:46:13,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:46:13,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:46:13,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:46:13,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:46:13,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:46:13,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:46:13,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:46:13,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:46:13,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:46:13,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:46:13,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:46:13,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:46:13,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:46:13,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:46:13,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:46:13,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:46:13,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:46:13,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:46:13,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:46:13,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:46:13,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:46:13,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:46:13,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:46:13,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:46:13,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:46:13,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:46:13,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:46:13,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:46:13,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:46:13,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:46:13,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:46:13,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:46:13,460 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 17:46:13,482 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:46:13,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:46:13,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:46:13,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:46:13,484 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:46:13,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:46:13,485 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:46:13,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:46:13,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:46:13,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:46:13,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:46:13,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:46:13,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:46:13,486 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:46:13,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:46:13,486 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:46:13,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:46:13,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:46:13,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:46:13,487 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:46:13,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:46:13,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:46:13,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:46:13,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:46:13,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:46:13,488 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:46:13,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:46:13,489 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:46:13,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:46:13,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:46:13,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:46:13,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:46:13,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:46:13,847 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:46:13,848 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:46:13,849 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe011_tso.opt.i [2020-10-09 17:46:13,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36921e051/49ab164990b24f1aa7036740db3d30cf/FLAGfeffd9437 [2020-10-09 17:46:14,442 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:46:14,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe011_tso.opt.i [2020-10-09 17:46:14,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36921e051/49ab164990b24f1aa7036740db3d30cf/FLAGfeffd9437 [2020-10-09 17:46:14,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36921e051/49ab164990b24f1aa7036740db3d30cf [2020-10-09 17:46:14,805 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:46:14,807 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:46:14,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:46:14,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:46:14,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:46:14,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:46:14" (1/1) ... [2020-10-09 17:46:14,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8751d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:14, skipping insertion in model container [2020-10-09 17:46:14,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:46:14" (1/1) ... [2020-10-09 17:46:14,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:46:14,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:46:15,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:46:15,396 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:46:15,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:46:15,549 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:46:15,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15 WrapperNode [2020-10-09 17:46:15,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:46:15,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:46:15,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:46:15,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:46:15,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15" (1/1) ... [2020-10-09 17:46:15,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15" (1/1) ... [2020-10-09 17:46:15,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:46:15,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:46:15,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:46:15,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:46:15,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15" (1/1) ... [2020-10-09 17:46:15,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15" (1/1) ... [2020-10-09 17:46:15,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15" (1/1) ... [2020-10-09 17:46:15,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15" (1/1) ... [2020-10-09 17:46:15,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15" (1/1) ... [2020-10-09 17:46:15,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15" (1/1) ... [2020-10-09 17:46:15,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15" (1/1) ... [2020-10-09 17:46:15,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:46:15,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:46:15,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:46:15,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:46:15,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15" (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 17:46:15,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:46:15,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:46:15,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:46:15,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:46:15,686 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:46:15,686 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:46:15,686 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:46:15,687 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:46:15,687 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:46:15,687 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:46:15,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:46:15,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:46:15,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:46:15,694 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 17:46:16,101 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:46:16,102 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:46:16,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:46:16 BoogieIcfgContainer [2020-10-09 17:46:16,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:46:16,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:46:16,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:46:16,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:46:16,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:46:14" (1/3) ... [2020-10-09 17:46:16,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7b29d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:46:16, skipping insertion in model container [2020-10-09 17:46:16,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:46:15" (2/3) ... [2020-10-09 17:46:16,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7b29d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:46:16, skipping insertion in model container [2020-10-09 17:46:16,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:46:16" (3/3) ... [2020-10-09 17:46:16,113 INFO L111 eAbstractionObserver]: Analyzing ICFG safe011_tso.opt.i [2020-10-09 17:46:16,124 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:46:16,132 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:46:16,133 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:46:16,158 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,159 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,159 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,159 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,160 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,160 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,160 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,161 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,161 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,161 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,161 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,162 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,162 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,162 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,162 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,163 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,163 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,163 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,167 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,168 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,168 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,168 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,177 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,177 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,178 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,178 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,180 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,181 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,181 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,181 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:46:16,203 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 17:46:16,224 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:46:16,225 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:46:16,225 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:46:16,225 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:46:16,225 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:46:16,225 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:46:16,225 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:46:16,225 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:46:16,238 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 77 places, 69 transitions, 153 flow [2020-10-09 17:46:16,281 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2020-10-09 17:46:16,281 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:46:16,287 INFO L80 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 66 events. 2/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-10-09 17:46:16,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 69 transitions, 153 flow [2020-10-09 17:46:16,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 55 transitions, 119 flow [2020-10-09 17:46:16,311 INFO L129 PetriNetUnfolder]: 1/54 cut-off events. [2020-10-09 17:46:16,312 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:46:16,312 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:16,313 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 17:46:16,314 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 853459722, now seen corresponding path program 1 times [2020-10-09 17:46:16,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:16,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501035101] [2020-10-09 17:46:16,335 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 17:46:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:46:16,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:46:16,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:16,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:16,574 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 17:46:16,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:16,643 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 17:46:16,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501035101] [2020-10-09 17:46:16,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:16,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:46:16,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008383515] [2020-10-09 17:46:16,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:46:16,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:16,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:46:16,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:46:16,915 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 69 [2020-10-09 17:46:16,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 119 flow. Second operand 8 states. [2020-10-09 17:46:16,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:46:16,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 69 [2020-10-09 17:46:16,919 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:46:17,017 INFO L129 PetriNetUnfolder]: 3/69 cut-off events. [2020-10-09 17:46:17,017 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:46:17,018 INFO L80 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 69 events. 3/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 4/72 useless extension candidates. Maximal degree in co-relation 75. Up to 7 conditions per place. [2020-10-09 17:46:17,019 INFO L132 encePairwiseOnDemand]: 62/69 looper letters, 6 selfloop transitions, 2 changer transitions 11/64 dead transitions. [2020-10-09 17:46:17,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 64 transitions, 173 flow [2020-10-09 17:46:17,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:46:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:46:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 553 transitions. [2020-10-09 17:46:17,039 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8904991948470209 [2020-10-09 17:46:17,040 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 553 transitions. [2020-10-09 17:46:17,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 553 transitions. [2020-10-09 17:46:17,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:46:17,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 553 transitions. [2020-10-09 17:46:17,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:46:17,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:46:17,059 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:46:17,061 INFO L185 Difference]: Start difference. First operand has 64 places, 55 transitions, 119 flow. Second operand 9 states and 553 transitions. [2020-10-09 17:46:17,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 64 transitions, 173 flow [2020-10-09 17:46:17,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 17:46:17,072 INFO L241 Difference]: Finished difference. Result has 76 places, 53 transitions, 132 flow [2020-10-09 17:46:17,075 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=132, PETRI_PLACES=76, PETRI_TRANSITIONS=53} [2020-10-09 17:46:17,076 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 12 predicate places. [2020-10-09 17:46:17,076 INFO L481 AbstractCegarLoop]: Abstraction has has 76 places, 53 transitions, 132 flow [2020-10-09 17:46:17,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:46:17,076 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:17,077 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 17:46:17,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:46:17,290 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:17,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1636534603, now seen corresponding path program 1 times [2020-10-09 17:46:17,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:17,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668087873] [2020-10-09 17:46:17,294 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 17:46:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:46:17,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:46:17,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:17,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:17,396 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 17:46:17,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:17,440 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 17:46:17,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668087873] [2020-10-09 17:46:17,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:17,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:46:17,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898661889] [2020-10-09 17:46:17,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:46:17,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:17,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:46:17,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:46:17,577 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 69 [2020-10-09 17:46:17,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 53 transitions, 132 flow. Second operand 8 states. [2020-10-09 17:46:17,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:46:17,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 69 [2020-10-09 17:46:17,579 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:46:17,735 INFO L129 PetriNetUnfolder]: 18/134 cut-off events. [2020-10-09 17:46:17,735 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2020-10-09 17:46:17,737 INFO L80 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 134 events. 18/134 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 443 event pairs, 0 based on Foata normal form. 5/137 useless extension candidates. Maximal degree in co-relation 226. Up to 15 conditions per place. [2020-10-09 17:46:17,738 INFO L132 encePairwiseOnDemand]: 62/69 looper letters, 10 selfloop transitions, 5 changer transitions 23/82 dead transitions. [2020-10-09 17:46:17,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 82 transitions, 306 flow [2020-10-09 17:46:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:46:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:46:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 795 transitions. [2020-10-09 17:46:17,741 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8862876254180602 [2020-10-09 17:46:17,742 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 795 transitions. [2020-10-09 17:46:17,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 795 transitions. [2020-10-09 17:46:17,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:46:17,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 795 transitions. [2020-10-09 17:46:17,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:46:17,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:46:17,747 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:46:17,747 INFO L185 Difference]: Start difference. First operand has 76 places, 53 transitions, 132 flow. Second operand 13 states and 795 transitions. [2020-10-09 17:46:17,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 82 transitions, 306 flow [2020-10-09 17:46:17,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 82 transitions, 254 flow, removed 24 selfloop flow, removed 8 redundant places. [2020-10-09 17:46:17,751 INFO L241 Difference]: Finished difference. Result has 84 places, 55 transitions, 158 flow [2020-10-09 17:46:17,752 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=158, PETRI_PLACES=84, PETRI_TRANSITIONS=55} [2020-10-09 17:46:17,753 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 20 predicate places. [2020-10-09 17:46:17,753 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 55 transitions, 158 flow [2020-10-09 17:46:17,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:46:17,753 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:17,753 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 17:46:17,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:46:17,966 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:17,967 INFO L82 PathProgramCache]: Analyzing trace with hash 390483596, now seen corresponding path program 1 times [2020-10-09 17:46:17,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:17,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52959210] [2020-10-09 17:46:17,970 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 17:46:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:46:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:46:18,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:18,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:18,101 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 17:46:18,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:18,143 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 17:46:18,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52959210] [2020-10-09 17:46:18,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:18,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:46:18,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37855959] [2020-10-09 17:46:18,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:46:18,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:46:18,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:46:18,325 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 69 [2020-10-09 17:46:18,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 55 transitions, 158 flow. Second operand 8 states. [2020-10-09 17:46:18,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:46:18,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 69 [2020-10-09 17:46:18,326 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:46:18,496 INFO L129 PetriNetUnfolder]: 36/282 cut-off events. [2020-10-09 17:46:18,496 INFO L130 PetriNetUnfolder]: For 258/270 co-relation queries the response was YES. [2020-10-09 17:46:18,498 INFO L80 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 282 events. 36/282 cut-off events. For 258/270 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1653 event pairs, 0 based on Foata normal form. 10/287 useless extension candidates. Maximal degree in co-relation 541. Up to 30 conditions per place. [2020-10-09 17:46:18,500 INFO L132 encePairwiseOnDemand]: 62/69 looper letters, 10 selfloop transitions, 5 changer transitions 23/84 dead transitions. [2020-10-09 17:46:18,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 358 flow [2020-10-09 17:46:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:46:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:46:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 795 transitions. [2020-10-09 17:46:18,503 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8862876254180602 [2020-10-09 17:46:18,503 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 795 transitions. [2020-10-09 17:46:18,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 795 transitions. [2020-10-09 17:46:18,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:46:18,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 795 transitions. [2020-10-09 17:46:18,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:46:18,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:46:18,507 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:46:18,508 INFO L185 Difference]: Start difference. First operand has 84 places, 55 transitions, 158 flow. Second operand 13 states and 795 transitions. [2020-10-09 17:46:18,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 358 flow [2020-10-09 17:46:18,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 84 transitions, 286 flow, removed 36 selfloop flow, removed 9 redundant places. [2020-10-09 17:46:18,514 INFO L241 Difference]: Finished difference. Result has 89 places, 57 transitions, 182 flow [2020-10-09 17:46:18,514 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=182, PETRI_PLACES=89, PETRI_TRANSITIONS=57} [2020-10-09 17:46:18,514 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 25 predicate places. [2020-10-09 17:46:18,514 INFO L481 AbstractCegarLoop]: Abstraction has has 89 places, 57 transitions, 182 flow [2020-10-09 17:46:18,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:46:18,515 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:18,515 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 17:46:18,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:46:18,731 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:18,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:18,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2105539277, now seen corresponding path program 1 times [2020-10-09 17:46:18,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:18,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145727416] [2020-10-09 17:46:18,734 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 17:46:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:46:18,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:46:18,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:18,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:18,855 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 17:46:18,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:18,921 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 17:46:18,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145727416] [2020-10-09 17:46:18,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:18,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:46:18,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965088129] [2020-10-09 17:46:18,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:46:18,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:46:18,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:46:19,077 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 69 [2020-10-09 17:46:19,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 57 transitions, 182 flow. Second operand 9 states. [2020-10-09 17:46:19,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:46:19,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 69 [2020-10-09 17:46:19,079 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:46:19,217 INFO L129 PetriNetUnfolder]: 16/215 cut-off events. [2020-10-09 17:46:19,217 INFO L130 PetriNetUnfolder]: For 302/343 co-relation queries the response was YES. [2020-10-09 17:46:19,218 INFO L80 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 215 events. 16/215 cut-off events. For 302/343 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1204 event pairs, 0 based on Foata normal form. 8/219 useless extension candidates. Maximal degree in co-relation 450. Up to 21 conditions per place. [2020-10-09 17:46:19,219 INFO L132 encePairwiseOnDemand]: 61/69 looper letters, 6 selfloop transitions, 4 changer transitions 12/69 dead transitions. [2020-10-09 17:46:19,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 69 transitions, 295 flow [2020-10-09 17:46:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:46:19,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:46:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 594 transitions. [2020-10-09 17:46:19,222 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8608695652173913 [2020-10-09 17:46:19,222 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 594 transitions. [2020-10-09 17:46:19,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 594 transitions. [2020-10-09 17:46:19,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:46:19,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 594 transitions. [2020-10-09 17:46:19,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:46:19,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:46:19,226 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:46:19,226 INFO L185 Difference]: Start difference. First operand has 89 places, 57 transitions, 182 flow. Second operand 10 states and 594 transitions. [2020-10-09 17:46:19,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 69 transitions, 295 flow [2020-10-09 17:46:19,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 69 transitions, 253 flow, removed 21 selfloop flow, removed 9 redundant places. [2020-10-09 17:46:19,232 INFO L241 Difference]: Finished difference. Result has 88 places, 57 transitions, 194 flow [2020-10-09 17:46:19,232 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=194, PETRI_PLACES=88, PETRI_TRANSITIONS=57} [2020-10-09 17:46:19,232 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 24 predicate places. [2020-10-09 17:46:19,232 INFO L481 AbstractCegarLoop]: Abstraction has has 88 places, 57 transitions, 194 flow [2020-10-09 17:46:19,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:46:19,233 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:19,233 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] [2020-10-09 17:46:19,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:46:19,455 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:19,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:19,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1667894051, now seen corresponding path program 1 times [2020-10-09 17:46:19,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:19,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686450765] [2020-10-09 17:46:19,457 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 17:46:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:46:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:46:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:19,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:19,540 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 17:46:19,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:19,579 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 17:46:19,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686450765] [2020-10-09 17:46:19,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:19,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:46:19,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174786106] [2020-10-09 17:46:19,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:46:19,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:19,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:46:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:46:19,665 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 69 [2020-10-09 17:46:19,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 57 transitions, 194 flow. Second operand 8 states. [2020-10-09 17:46:19,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:46:19,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 69 [2020-10-09 17:46:19,666 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:46:19,906 INFO L129 PetriNetUnfolder]: 188/535 cut-off events. [2020-10-09 17:46:19,907 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2020-10-09 17:46:19,909 INFO L80 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 535 events. 188/535 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3517 event pairs, 0 based on Foata normal form. 21/525 useless extension candidates. Maximal degree in co-relation 948. Up to 108 conditions per place. [2020-10-09 17:46:19,910 INFO L132 encePairwiseOnDemand]: 60/69 looper letters, 6 selfloop transitions, 9 changer transitions 33/95 dead transitions. [2020-10-09 17:46:19,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 95 transitions, 366 flow [2020-10-09 17:46:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:46:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:46:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 723 transitions. [2020-10-09 17:46:19,914 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8731884057971014 [2020-10-09 17:46:19,914 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 723 transitions. [2020-10-09 17:46:19,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 723 transitions. [2020-10-09 17:46:19,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:46:19,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 723 transitions. [2020-10-09 17:46:19,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:46:19,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:46:19,919 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:46:19,919 INFO L185 Difference]: Start difference. First operand has 88 places, 57 transitions, 194 flow. Second operand 12 states and 723 transitions. [2020-10-09 17:46:19,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 95 transitions, 366 flow [2020-10-09 17:46:19,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 330 flow, removed 10 selfloop flow, removed 12 redundant places. [2020-10-09 17:46:19,923 INFO L241 Difference]: Finished difference. Result has 90 places, 62 transitions, 222 flow [2020-10-09 17:46:19,924 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=222, PETRI_PLACES=90, PETRI_TRANSITIONS=62} [2020-10-09 17:46:19,924 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 26 predicate places. [2020-10-09 17:46:19,924 INFO L481 AbstractCegarLoop]: Abstraction has has 90 places, 62 transitions, 222 flow [2020-10-09 17:46:19,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:46:19,924 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:46:19,924 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 17:46:20,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:46:20,136 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:46:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:46:20,137 INFO L82 PathProgramCache]: Analyzing trace with hash -637317183, now seen corresponding path program 1 times [2020-10-09 17:46:20,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:46:20,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894765718] [2020-10-09 17:46:20,138 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 17:46:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:46:20,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:46:20,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:46:20,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:46:20,250 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 17:46:20,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:46:20,276 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 17:46:20,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894765718] [2020-10-09 17:46:20,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:46:20,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:46:20,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095965657] [2020-10-09 17:46:20,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:46:20,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:46:20,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:46:20,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:46:20,438 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 69 [2020-10-09 17:46:20,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 62 transitions, 222 flow. Second operand 10 states. [2020-10-09 17:46:20,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:46:20,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 69 [2020-10-09 17:46:20,439 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:46:20,588 INFO L129 PetriNetUnfolder]: 30/176 cut-off events. [2020-10-09 17:46:20,589 INFO L130 PetriNetUnfolder]: For 190/235 co-relation queries the response was YES. [2020-10-09 17:46:20,590 INFO L80 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 176 events. 30/176 cut-off events. For 190/235 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 825 event pairs, 0 based on Foata normal form. 30/203 useless extension candidates. Maximal degree in co-relation 466. Up to 34 conditions per place. [2020-10-09 17:46:20,590 INFO L132 encePairwiseOnDemand]: 61/69 looper letters, 0 selfloop transitions, 0 changer transitions 62/62 dead transitions. [2020-10-09 17:46:20,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 62 transitions, 272 flow [2020-10-09 17:46:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 17:46:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-09 17:46:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 639 transitions. [2020-10-09 17:46:20,594 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.841897233201581 [2020-10-09 17:46:20,595 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 639 transitions. [2020-10-09 17:46:20,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 639 transitions. [2020-10-09 17:46:20,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:46:20,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 639 transitions. [2020-10-09 17:46:20,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-09 17:46:20,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-09 17:46:20,601 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-09 17:46:20,601 INFO L185 Difference]: Start difference. First operand has 90 places, 62 transitions, 222 flow. Second operand 11 states and 639 transitions. [2020-10-09 17:46:20,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 62 transitions, 272 flow [2020-10-09 17:46:20,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 62 transitions, 224 flow, removed 12 selfloop flow, removed 10 redundant places. [2020-10-09 17:46:20,605 INFO L241 Difference]: Finished difference. Result has 77 places, 0 transitions, 0 flow [2020-10-09 17:46:20,605 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=77, PETRI_TRANSITIONS=0} [2020-10-09 17:46:20,606 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 13 predicate places. [2020-10-09 17:46:20,606 INFO L481 AbstractCegarLoop]: Abstraction has has 77 places, 0 transitions, 0 flow [2020-10-09 17:46:20,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:46:20,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:46:20,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:46:20 BasicIcfg [2020-10-09 17:46:20,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:46:20,831 INFO L168 Benchmark]: Toolchain (without parser) took 6023.16 ms. Allocated memory was 248.5 MB in the beginning and 429.4 MB in the end (delta: 180.9 MB). Free memory was 204.2 MB in the beginning and 301.1 MB in the end (delta: -97.0 MB). Peak memory consumption was 83.9 MB. Max. memory is 14.2 GB. [2020-10-09 17:46:20,831 INFO L168 Benchmark]: CDTParser took 1.37 ms. Allocated memory is still 248.5 MB. Free memory is still 224.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:46:20,832 INFO L168 Benchmark]: CACSL2BoogieTranslator took 743.58 ms. Allocated memory was 248.5 MB in the beginning and 306.2 MB in the end (delta: 57.7 MB). Free memory was 204.2 MB in the beginning and 257.1 MB in the end (delta: -52.9 MB). Peak memory consumption was 27.0 MB. Max. memory is 14.2 GB. [2020-10-09 17:46:20,833 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.18 ms. Allocated memory is still 306.2 MB. Free memory was 257.1 MB in the beginning and 254.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:46:20,834 INFO L168 Benchmark]: Boogie Preprocessor took 26.18 ms. Allocated memory is still 306.2 MB. Free memory was 254.5 MB in the beginning and 252.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:46:20,835 INFO L168 Benchmark]: RCFGBuilder took 484.93 ms. Allocated memory is still 306.2 MB. Free memory was 252.0 MB in the beginning and 229.8 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 14.2 GB. [2020-10-09 17:46:20,836 INFO L168 Benchmark]: TraceAbstraction took 4722.36 ms. Allocated memory was 306.2 MB in the beginning and 429.4 MB in the end (delta: 123.2 MB). Free memory was 229.8 MB in the beginning and 301.1 MB in the end (delta: -71.3 MB). Peak memory consumption was 51.9 MB. Max. memory is 14.2 GB. [2020-10-09 17:46:20,841 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.37 ms. Allocated memory is still 248.5 MB. Free memory is still 224.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 743.58 ms. Allocated memory was 248.5 MB in the beginning and 306.2 MB in the end (delta: 57.7 MB). Free memory was 204.2 MB in the beginning and 257.1 MB in the end (delta: -52.9 MB). Peak memory consumption was 27.0 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 41.18 ms. Allocated memory is still 306.2 MB. Free memory was 257.1 MB in the beginning and 254.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.18 ms. Allocated memory is still 306.2 MB. Free memory was 254.5 MB in the beginning and 252.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 484.93 ms. Allocated memory is still 306.2 MB. Free memory was 252.0 MB in the beginning and 229.8 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 14.2 GB. * TraceAbstraction took 4722.36 ms. Allocated memory was 306.2 MB in the beginning and 429.4 MB in the end (delta: 123.2 MB). Free memory was 229.8 MB in the beginning and 301.1 MB in the end (delta: -71.3 MB). Peak memory consumption was 51.9 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, 68 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: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 58 SDtfs, 262 SDslu, 365 SDs, 0 SdLazy, 380 SolverSat, 91 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 509 GetRequests, 416 SyntacticMatches, 11 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=222occurred 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, 239 NumberOfCodeBlocks, 239 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 466 ConstructedInterpolants, 0 QuantifiedInterpolants, 51214 SizeOfPredicates, 39 NumberOfNonLiveVariables, 622 ConjunctsInSsa, 43 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...