/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/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 01:44:33,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 01:44:33,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 01:44:33,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 01:44:33,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 01:44:33,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 01:44:33,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 01:44:33,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 01:44:33,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 01:44:33,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 01:44:33,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 01:44:33,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 01:44:33,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 01:44:33,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 01:44:33,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 01:44:33,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 01:44:33,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 01:44:33,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 01:44:33,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 01:44:33,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 01:44:33,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 01:44:33,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 01:44:33,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 01:44:33,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 01:44:33,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 01:44:33,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 01:44:33,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 01:44:33,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 01:44:33,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 01:44:33,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 01:44:33,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 01:44:33,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 01:44:33,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 01:44:33,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 01:44:33,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 01:44:33,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 01:44:33,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2020-10-16 01:44:33,483 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 01:44:33,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 01:44:33,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 01:44:33,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 01:44:33,485 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 01:44:33,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 01:44:33,485 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 01:44:33,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 01:44:33,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 01:44:33,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 01:44:33,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 01:44:33,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 01:44:33,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 01:44:33,487 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 01:44:33,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 01:44:33,487 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 01:44:33,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 01:44:33,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 01:44:33,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 01:44:33,488 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 01:44:33,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 01:44:33,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 01:44:33,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 01:44:33,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 01:44:33,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 01:44:33,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 01:44:33,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 01:44:33,490 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 01:44:33,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 01:44:33,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 01:44:33,800 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 01:44:33,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 01:44:33,805 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 01:44:33,806 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 01:44:33,807 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i [2020-10-16 01:44:33,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c00c7041/e74bd6d1df8d4cc384ce835ba1f010e0/FLAG7e84c4c37 [2020-10-16 01:44:34,436 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 01:44:34,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i [2020-10-16 01:44:34,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c00c7041/e74bd6d1df8d4cc384ce835ba1f010e0/FLAG7e84c4c37 [2020-10-16 01:44:34,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c00c7041/e74bd6d1df8d4cc384ce835ba1f010e0 [2020-10-16 01:44:34,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 01:44:34,760 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 01:44:34,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 01:44:34,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 01:44:34,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 01:44:34,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:44:34" (1/1) ... [2020-10-16 01:44:34,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f060703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:34, skipping insertion in model container [2020-10-16 01:44:34,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:44:34" (1/1) ... [2020-10-16 01:44:34,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 01:44:34,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 01:44:35,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 01:44:35,427 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 01:44:35,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 01:44:35,608 INFO L208 MainTranslator]: Completed translation [2020-10-16 01:44:35,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35 WrapperNode [2020-10-16 01:44:35,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 01:44:35,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 01:44:35,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 01:44:35,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 01:44:35,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35" (1/1) ... [2020-10-16 01:44:35,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35" (1/1) ... [2020-10-16 01:44:35,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 01:44:35,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 01:44:35,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 01:44:35,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 01:44:35,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35" (1/1) ... [2020-10-16 01:44:35,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35" (1/1) ... [2020-10-16 01:44:35,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35" (1/1) ... [2020-10-16 01:44:35,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35" (1/1) ... [2020-10-16 01:44:35,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35" (1/1) ... [2020-10-16 01:44:35,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35" (1/1) ... [2020-10-16 01:44:35,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35" (1/1) ... [2020-10-16 01:44:35,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 01:44:35,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 01:44:35,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 01:44:35,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 01:44:35,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35" (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 [2020-10-16 01:44:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 01:44:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 01:44:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 01:44:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 01:44:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-16 01:44:35,768 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-16 01:44:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-16 01:44:35,769 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-16 01:44:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-16 01:44:35,769 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-16 01:44:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 01:44:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 01:44:35,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 01:44:35,771 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 01:44:36,111 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 01:44:36,111 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-16 01:44:36,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:44:36 BoogieIcfgContainer [2020-10-16 01:44:36,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 01:44:36,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 01:44:36,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 01:44:36,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 01:44:36,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:44:34" (1/3) ... [2020-10-16 01:44:36,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad678af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:44:36, skipping insertion in model container [2020-10-16 01:44:36,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:44:35" (2/3) ... [2020-10-16 01:44:36,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad678af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:44:36, skipping insertion in model container [2020-10-16 01:44:36,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:44:36" (3/3) ... [2020-10-16 01:44:36,125 INFO L111 eAbstractionObserver]: Analyzing ICFG safe028_tso.opt.i [2020-10-16 01:44:36,138 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 01:44:36,145 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 01:44:36,146 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 01:44:36,177 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,178 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,178 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,178 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,179 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,179 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,179 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,180 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,180 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,180 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,180 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,180 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,181 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,181 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,181 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,182 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,182 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,182 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,186 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,186 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,187 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,187 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,206 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,206 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,207 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,207 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,210 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,210 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,210 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,211 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:44:36,239 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-16 01:44:36,262 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 01:44:36,262 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 01:44:36,262 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 01:44:36,262 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 01:44:36,262 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 01:44:36,262 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 01:44:36,263 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 01:44:36,264 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 01:44:36,281 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 77 places, 69 transitions, 153 flow [2020-10-16 01:44:36,320 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2020-10-16 01:44:36,321 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:44:36,326 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 45 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2020-10-16 01:44:36,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 69 transitions, 153 flow [2020-10-16 01:44:36,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 55 transitions, 119 flow [2020-10-16 01:44:36,335 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 01:44:36,337 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 55 transitions, 119 flow [2020-10-16 01:44:36,340 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 55 transitions, 119 flow [2020-10-16 01:44:36,341 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 64 places, 55 transitions, 119 flow [2020-10-16 01:44:36,359 INFO L129 PetriNetUnfolder]: 1/55 cut-off events. [2020-10-16 01:44:36,360 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:44:36,361 INFO L80 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 55 events. 1/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-16 01:44:36,363 INFO L117 LiptonReduction]: Number of co-enabled transitions 804 [2020-10-16 01:44:37,741 INFO L132 LiptonReduction]: Checked pairs total: 1634 [2020-10-16 01:44:37,741 INFO L134 LiptonReduction]: Total number of compositions: 44 [2020-10-16 01:44:37,744 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1412 [2020-10-16 01:44:37,753 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2020-10-16 01:44:37,753 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:44:37,753 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:44:37,754 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:44:37,755 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:44:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:44:37,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1926828197, now seen corresponding path program 1 times [2020-10-16 01:44:37,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:44:37,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732506283] [2020-10-16 01:44:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:44:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:44:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:44:38,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732506283] [2020-10-16 01:44:38,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:44:38,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 01:44:38,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017158502] [2020-10-16 01:44:38,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:44:38,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:44:38,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:44:38,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:44:38,053 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 113 [2020-10-16 01:44:38,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 43 flow. Second operand 3 states. [2020-10-16 01:44:38,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:44:38,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 113 [2020-10-16 01:44:38,058 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:44:38,081 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2020-10-16 01:44:38,081 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:44:38,082 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 16 events. 0/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2020-10-16 01:44:38,083 INFO L132 encePairwiseOnDemand]: 109/113 looper letters, 1 selfloop transitions, 2 changer transitions 0/16 dead transitions. [2020-10-16 01:44:38,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 16 transitions, 47 flow [2020-10-16 01:44:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:44:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:44:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2020-10-16 01:44:38,100 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8495575221238938 [2020-10-16 01:44:38,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2020-10-16 01:44:38,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2020-10-16 01:44:38,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:44:38,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2020-10-16 01:44:38,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:44:38,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:44:38,118 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:44:38,120 INFO L185 Difference]: Start difference. First operand has 26 places, 17 transitions, 43 flow. Second operand 3 states and 288 transitions. [2020-10-16 01:44:38,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 16 transitions, 47 flow [2020-10-16 01:44:38,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 16 transitions, 44 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-16 01:44:38,127 INFO L241 Difference]: Finished difference. Result has 26 places, 16 transitions, 46 flow [2020-10-16 01:44:38,130 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=26, PETRI_TRANSITIONS=16} [2020-10-16 01:44:38,131 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2020-10-16 01:44:38,132 INFO L481 AbstractCegarLoop]: Abstraction has has 26 places, 16 transitions, 46 flow [2020-10-16 01:44:38,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:44:38,132 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:44:38,132 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:44:38,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 01:44:38,133 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:44:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:44:38,133 INFO L82 PathProgramCache]: Analyzing trace with hash 397867617, now seen corresponding path program 1 times [2020-10-16 01:44:38,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:44:38,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218532503] [2020-10-16 01:44:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:44:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:44:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:44:38,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218532503] [2020-10-16 01:44:38,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:44:38,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:44:38,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541765446] [2020-10-16 01:44:38,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:44:38,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:44:38,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:44:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:44:38,249 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 113 [2020-10-16 01:44:38,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 16 transitions, 46 flow. Second operand 4 states. [2020-10-16 01:44:38,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:44:38,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 113 [2020-10-16 01:44:38,252 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:44:38,293 INFO L129 PetriNetUnfolder]: 5/36 cut-off events. [2020-10-16 01:44:38,293 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-10-16 01:44:38,294 INFO L80 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 36 events. 5/36 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 95 event pairs, 1 based on Foata normal form. 4/39 useless extension candidates. Maximal degree in co-relation 64. Up to 7 conditions per place. [2020-10-16 01:44:38,294 INFO L132 encePairwiseOnDemand]: 109/113 looper letters, 4 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2020-10-16 01:44:38,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 19 transitions, 71 flow [2020-10-16 01:44:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 01:44:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 01:44:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2020-10-16 01:44:38,299 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7920353982300885 [2020-10-16 01:44:38,299 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2020-10-16 01:44:38,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2020-10-16 01:44:38,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:44:38,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2020-10-16 01:44:38,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 01:44:38,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 01:44:38,305 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 01:44:38,305 INFO L185 Difference]: Start difference. First operand has 26 places, 16 transitions, 46 flow. Second operand 4 states and 358 transitions. [2020-10-16 01:44:38,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 19 transitions, 71 flow [2020-10-16 01:44:38,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 19 transitions, 65 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 01:44:38,307 INFO L241 Difference]: Finished difference. Result has 29 places, 16 transitions, 56 flow [2020-10-16 01:44:38,307 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=29, PETRI_TRANSITIONS=16} [2020-10-16 01:44:38,308 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2020-10-16 01:44:38,308 INFO L481 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 56 flow [2020-10-16 01:44:38,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:44:38,308 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:44:38,309 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:44:38,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 01:44:38,309 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:44:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:44:38,310 INFO L82 PathProgramCache]: Analyzing trace with hash -902241234, now seen corresponding path program 1 times [2020-10-16 01:44:38,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:44:38,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150319562] [2020-10-16 01:44:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:44:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:44:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:44:38,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150319562] [2020-10-16 01:44:38,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:44:38,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:44:38,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319185530] [2020-10-16 01:44:38,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:44:38,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:44:38,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:44:38,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:44:38,397 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 113 [2020-10-16 01:44:38,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 16 transitions, 56 flow. Second operand 4 states. [2020-10-16 01:44:38,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:44:38,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 113 [2020-10-16 01:44:38,398 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:44:38,463 INFO L129 PetriNetUnfolder]: 28/68 cut-off events. [2020-10-16 01:44:38,464 INFO L130 PetriNetUnfolder]: For 73/78 co-relation queries the response was YES. [2020-10-16 01:44:38,464 INFO L80 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 68 events. 28/68 cut-off events. For 73/78 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 217 event pairs, 12 based on Foata normal form. 10/74 useless extension candidates. Maximal degree in co-relation 153. Up to 45 conditions per place. [2020-10-16 01:44:38,465 INFO L132 encePairwiseOnDemand]: 107/113 looper letters, 5 selfloop transitions, 4 changer transitions 7/26 dead transitions. [2020-10-16 01:44:38,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 108 flow [2020-10-16 01:44:38,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 01:44:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 01:44:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 413 transitions. [2020-10-16 01:44:38,469 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7309734513274336 [2020-10-16 01:44:38,469 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 413 transitions. [2020-10-16 01:44:38,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 413 transitions. [2020-10-16 01:44:38,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:44:38,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 413 transitions. [2020-10-16 01:44:38,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 01:44:38,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 01:44:38,473 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 01:44:38,473 INFO L185 Difference]: Start difference. First operand has 29 places, 16 transitions, 56 flow. Second operand 5 states and 413 transitions. [2020-10-16 01:44:38,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 108 flow [2020-10-16 01:44:38,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 96 flow, removed 2 selfloop flow, removed 4 redundant places. [2020-10-16 01:44:38,475 INFO L241 Difference]: Finished difference. Result has 32 places, 19 transitions, 80 flow [2020-10-16 01:44:38,475 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=32, PETRI_TRANSITIONS=19} [2020-10-16 01:44:38,475 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2020-10-16 01:44:38,476 INFO L481 AbstractCegarLoop]: Abstraction has has 32 places, 19 transitions, 80 flow [2020-10-16 01:44:38,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:44:38,476 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:44:38,476 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:44:38,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 01:44:38,477 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:44:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:44:38,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2095275937, now seen corresponding path program 1 times [2020-10-16 01:44:38,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:44:38,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690306890] [2020-10-16 01:44:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:44:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:44:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:44:38,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690306890] [2020-10-16 01:44:38,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:44:38,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 01:44:38,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923327094] [2020-10-16 01:44:38,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 01:44:38,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:44:38,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 01:44:38,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 01:44:38,546 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 113 [2020-10-16 01:44:38,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 19 transitions, 80 flow. Second operand 5 states. [2020-10-16 01:44:38,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:44:38,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 113 [2020-10-16 01:44:38,547 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:44:38,605 INFO L129 PetriNetUnfolder]: 16/49 cut-off events. [2020-10-16 01:44:38,605 INFO L130 PetriNetUnfolder]: For 66/95 co-relation queries the response was YES. [2020-10-16 01:44:38,606 INFO L80 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 49 events. 16/49 cut-off events. For 66/95 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 128 event pairs, 2 based on Foata normal form. 12/59 useless extension candidates. Maximal degree in co-relation 164. Up to 35 conditions per place. [2020-10-16 01:44:38,607 INFO L132 encePairwiseOnDemand]: 107/113 looper letters, 5 selfloop transitions, 7 changer transitions 7/29 dead transitions. [2020-10-16 01:44:38,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 176 flow [2020-10-16 01:44:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 01:44:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 01:44:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 495 transitions. [2020-10-16 01:44:38,610 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7300884955752213 [2020-10-16 01:44:38,610 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 495 transitions. [2020-10-16 01:44:38,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 495 transitions. [2020-10-16 01:44:38,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:44:38,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 495 transitions. [2020-10-16 01:44:38,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 01:44:38,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 01:44:38,614 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 01:44:38,614 INFO L185 Difference]: Start difference. First operand has 32 places, 19 transitions, 80 flow. Second operand 6 states and 495 transitions. [2020-10-16 01:44:38,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 176 flow [2020-10-16 01:44:38,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 170 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 01:44:38,617 INFO L241 Difference]: Finished difference. Result has 36 places, 22 transitions, 130 flow [2020-10-16 01:44:38,617 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=36, PETRI_TRANSITIONS=22} [2020-10-16 01:44:38,617 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2020-10-16 01:44:38,617 INFO L481 AbstractCegarLoop]: Abstraction has has 36 places, 22 transitions, 130 flow [2020-10-16 01:44:38,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 01:44:38,618 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:44:38,618 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:44:38,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 01:44:38,618 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:44:38,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:44:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash -809571543, now seen corresponding path program 1 times [2020-10-16 01:44:38,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:44:38,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583028611] [2020-10-16 01:44:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:44:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:44:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:44:38,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583028611] [2020-10-16 01:44:38,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:44:38,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 01:44:38,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607452517] [2020-10-16 01:44:38,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 01:44:38,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:44:38,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 01:44:38,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 01:44:38,692 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 113 [2020-10-16 01:44:38,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 22 transitions, 130 flow. Second operand 6 states. [2020-10-16 01:44:38,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:44:38,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 113 [2020-10-16 01:44:38,693 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:44:38,756 INFO L129 PetriNetUnfolder]: 7/31 cut-off events. [2020-10-16 01:44:38,756 INFO L130 PetriNetUnfolder]: For 97/137 co-relation queries the response was YES. [2020-10-16 01:44:38,756 INFO L80 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 31 events. 7/31 cut-off events. For 97/137 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 47 event pairs, 0 based on Foata normal form. 12/42 useless extension candidates. Maximal degree in co-relation 122. Up to 20 conditions per place. [2020-10-16 01:44:38,757 INFO L132 encePairwiseOnDemand]: 107/113 looper letters, 2 selfloop transitions, 10 changer transitions 4/26 dead transitions. [2020-10-16 01:44:38,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 26 transitions, 198 flow [2020-10-16 01:44:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 01:44:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 01:44:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 571 transitions. [2020-10-16 01:44:38,760 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7218710493046776 [2020-10-16 01:44:38,760 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 571 transitions. [2020-10-16 01:44:38,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 571 transitions. [2020-10-16 01:44:38,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:44:38,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 571 transitions. [2020-10-16 01:44:38,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 01:44:38,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 01:44:38,764 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 01:44:38,764 INFO L185 Difference]: Start difference. First operand has 36 places, 22 transitions, 130 flow. Second operand 7 states and 571 transitions. [2020-10-16 01:44:38,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 26 transitions, 198 flow [2020-10-16 01:44:38,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 162 flow, removed 14 selfloop flow, removed 4 redundant places. [2020-10-16 01:44:38,768 INFO L241 Difference]: Finished difference. Result has 39 places, 22 transitions, 132 flow [2020-10-16 01:44:38,768 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=132, PETRI_PLACES=39, PETRI_TRANSITIONS=22} [2020-10-16 01:44:38,768 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 13 predicate places. [2020-10-16 01:44:38,768 INFO L481 AbstractCegarLoop]: Abstraction has has 39 places, 22 transitions, 132 flow [2020-10-16 01:44:38,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 01:44:38,769 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:44:38,769 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:44:38,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 01:44:38,769 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:44:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:44:38,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1561429207, now seen corresponding path program 1 times [2020-10-16 01:44:38,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:44:38,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847201219] [2020-10-16 01:44:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:44:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:44:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:44:38,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847201219] [2020-10-16 01:44:38,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:44:38,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 01:44:38,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396439962] [2020-10-16 01:44:38,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:44:38,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:44:38,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:44:38,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:44:38,822 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 113 [2020-10-16 01:44:38,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 22 transitions, 132 flow. Second operand 4 states. [2020-10-16 01:44:38,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:44:38,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 113 [2020-10-16 01:44:38,823 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:44:38,848 INFO L129 PetriNetUnfolder]: 12/47 cut-off events. [2020-10-16 01:44:38,849 INFO L130 PetriNetUnfolder]: For 98/107 co-relation queries the response was YES. [2020-10-16 01:44:38,850 INFO L80 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 47 events. 12/47 cut-off events. For 98/107 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 118 event pairs, 0 based on Foata normal form. 3/49 useless extension candidates. Maximal degree in co-relation 153. Up to 23 conditions per place. [2020-10-16 01:44:38,850 INFO L132 encePairwiseOnDemand]: 110/113 looper letters, 4 selfloop transitions, 1 changer transitions 2/24 dead transitions. [2020-10-16 01:44:38,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 24 transitions, 152 flow [2020-10-16 01:44:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 01:44:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 01:44:38,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 356 transitions. [2020-10-16 01:44:38,852 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7876106194690266 [2020-10-16 01:44:38,852 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 356 transitions. [2020-10-16 01:44:38,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 356 transitions. [2020-10-16 01:44:38,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:44:38,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 356 transitions. [2020-10-16 01:44:38,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 01:44:38,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 01:44:38,855 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 01:44:38,855 INFO L185 Difference]: Start difference. First operand has 39 places, 22 transitions, 132 flow. Second operand 4 states and 356 transitions. [2020-10-16 01:44:38,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 24 transitions, 152 flow [2020-10-16 01:44:38,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 109 flow, removed 13 selfloop flow, removed 7 redundant places. [2020-10-16 01:44:38,858 INFO L241 Difference]: Finished difference. Result has 35 places, 22 transitions, 97 flow [2020-10-16 01:44:38,858 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=22} [2020-10-16 01:44:38,858 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2020-10-16 01:44:38,859 INFO L481 AbstractCegarLoop]: Abstraction has has 35 places, 22 transitions, 97 flow [2020-10-16 01:44:38,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:44:38,859 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:44:38,859 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:44:38,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 01:44:38,859 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:44:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:44:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1120662827, now seen corresponding path program 2 times [2020-10-16 01:44:38,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:44:38,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803629884] [2020-10-16 01:44:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:44:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:44:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:44:38,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803629884] [2020-10-16 01:44:38,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:44:38,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 01:44:38,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797365182] [2020-10-16 01:44:38,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:44:38,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:44:38,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:44:38,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:44:38,909 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 113 [2020-10-16 01:44:38,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 22 transitions, 97 flow. Second operand 4 states. [2020-10-16 01:44:38,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:44:38,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 113 [2020-10-16 01:44:38,910 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:44:38,925 INFO L129 PetriNetUnfolder]: 7/36 cut-off events. [2020-10-16 01:44:38,925 INFO L130 PetriNetUnfolder]: For 26/29 co-relation queries the response was YES. [2020-10-16 01:44:38,926 INFO L80 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 36 events. 7/36 cut-off events. For 26/29 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 71 event pairs, 0 based on Foata normal form. 2/37 useless extension candidates. Maximal degree in co-relation 92. Up to 12 conditions per place. [2020-10-16 01:44:38,926 INFO L132 encePairwiseOnDemand]: 110/113 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2020-10-16 01:44:38,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 22 transitions, 103 flow [2020-10-16 01:44:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 01:44:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 01:44:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 369 transitions. [2020-10-16 01:44:38,928 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8163716814159292 [2020-10-16 01:44:38,928 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 369 transitions. [2020-10-16 01:44:38,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 369 transitions. [2020-10-16 01:44:38,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:44:38,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 369 transitions. [2020-10-16 01:44:38,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 01:44:38,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 01:44:38,931 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 01:44:38,931 INFO L185 Difference]: Start difference. First operand has 35 places, 22 transitions, 97 flow. Second operand 4 states and 369 transitions. [2020-10-16 01:44:38,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 22 transitions, 103 flow [2020-10-16 01:44:38,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 22 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 01:44:38,932 INFO L241 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2020-10-16 01:44:38,933 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2020-10-16 01:44:38,933 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2020-10-16 01:44:38,933 INFO L481 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2020-10-16 01:44:38,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:44:38,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 01:44:38,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 01:44:38 BasicIcfg [2020-10-16 01:44:38,938 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 01:44:38,941 INFO L168 Benchmark]: Toolchain (without parser) took 4179.48 ms. Allocated memory was 248.0 MB in the beginning and 367.5 MB in the end (delta: 119.5 MB). Free memory was 201.2 MB in the beginning and 258.2 MB in the end (delta: -57.0 MB). Peak memory consumption was 62.6 MB. Max. memory is 14.2 GB. [2020-10-16 01:44:38,941 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 248.0 MB. Free memory is still 221.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 01:44:38,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 848.10 ms. Allocated memory was 248.0 MB in the beginning and 304.6 MB in the end (delta: 56.6 MB). Free memory was 201.2 MB in the beginning and 255.3 MB in the end (delta: -54.1 MB). Peak memory consumption was 27.3 MB. Max. memory is 14.2 GB. [2020-10-16 01:44:38,943 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.15 ms. Allocated memory is still 304.6 MB. Free memory was 255.3 MB in the beginning and 252.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 01:44:38,944 INFO L168 Benchmark]: Boogie Preprocessor took 26.54 ms. Allocated memory is still 304.6 MB. Free memory was 252.8 MB in the beginning and 250.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 01:44:38,945 INFO L168 Benchmark]: RCFGBuilder took 420.45 ms. Allocated memory is still 304.6 MB. Free memory was 250.3 MB in the beginning and 228.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-16 01:44:38,946 INFO L168 Benchmark]: TraceAbstraction took 2823.44 ms. Allocated memory was 304.6 MB in the beginning and 367.5 MB in the end (delta: 62.9 MB). Free memory was 228.4 MB in the beginning and 258.2 MB in the end (delta: -29.8 MB). Peak memory consumption was 33.1 MB. Max. memory is 14.2 GB. [2020-10-16 01:44:38,950 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 248.0 MB. Free memory is still 221.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 848.10 ms. Allocated memory was 248.0 MB in the beginning and 304.6 MB in the end (delta: 56.6 MB). Free memory was 201.2 MB in the beginning and 255.3 MB in the end (delta: -54.1 MB). Peak memory consumption was 27.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 56.15 ms. Allocated memory is still 304.6 MB. Free memory was 255.3 MB in the beginning and 252.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.54 ms. Allocated memory is still 304.6 MB. Free memory was 252.8 MB in the beginning and 250.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 420.45 ms. Allocated memory is still 304.6 MB. Free memory was 250.3 MB in the beginning and 228.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2823.44 ms. Allocated memory was 304.6 MB in the beginning and 367.5 MB in the end (delta: 62.9 MB). Free memory was 228.4 MB in the beginning and 258.2 MB in the end (delta: -29.8 MB). Peak memory consumption was 33.1 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 617 VarBasedMoverChecksPositive, 49 VarBasedMoverChecksNegative, 7 SemBasedMoverChecksPositive, 42 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 81 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.4s, 64 PlacesBefore, 26 PlacesAfterwards, 55 TransitionsBefore, 17 TransitionsAfterwards, 804 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 44 TotalNumberOfCompositions, 1634 MoverChecksTotal - 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: 2.6s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 21 SDtfs, 17 SDslu, 14 SDs, 0 SdLazy, 113 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred 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, 0.3s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 2428 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...