/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/safe021_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 01:42:21,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 01:42:21,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 01:42:21,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 01:42:21,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 01:42:21,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 01:42:21,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 01:42:21,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 01:42:21,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 01:42:21,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 01:42:21,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 01:42:21,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 01:42:21,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 01:42:21,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 01:42:21,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 01:42:21,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 01:42:21,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 01:42:21,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 01:42:21,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 01:42:21,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 01:42:21,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 01:42:21,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 01:42:21,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 01:42:21,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 01:42:21,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 01:42:21,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 01:42:21,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 01:42:21,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 01:42:21,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 01:42:21,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 01:42:21,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 01:42:21,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 01:42:21,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 01:42:21,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 01:42:21,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 01:42:21,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 01:42:21,718 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 01:42:21,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 01:42:21,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 01:42:21,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 01:42:21,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 01:42:21,744 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 01:42:21,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 01:42:21,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 01:42:21,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 01:42:21,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 01:42:21,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 01:42:21,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 01:42:21,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 01:42:21,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 01:42:21,745 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 01:42:21,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 01:42:21,746 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 01:42:21,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 01:42:21,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 01:42:21,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 01:42:21,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 01:42:21,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 01:42:21,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 01:42:21,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 01:42:21,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 01:42:21,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 01:42:21,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 01:42:21,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 01:42:21,748 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 01:42:21,748 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 01:42:22,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 01:42:22,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 01:42:22,030 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 01:42:22,031 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 01:42:22,031 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 01:42:22,032 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.oepc.i [2020-10-16 01:42:22,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2782a42e5/2733bf10e95a427a9e0e03840862e9bd/FLAG927c8cbb8 [2020-10-16 01:42:22,587 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 01:42:22,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.oepc.i [2020-10-16 01:42:22,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2782a42e5/2733bf10e95a427a9e0e03840862e9bd/FLAG927c8cbb8 [2020-10-16 01:42:22,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2782a42e5/2733bf10e95a427a9e0e03840862e9bd [2020-10-16 01:42:22,941 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 01:42:22,943 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 01:42:22,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 01:42:22,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 01:42:22,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 01:42:22,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:42:22" (1/1) ... [2020-10-16 01:42:22,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@549273c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:22, skipping insertion in model container [2020-10-16 01:42:22,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:42:22" (1/1) ... [2020-10-16 01:42:22,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 01:42:23,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 01:42:23,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 01:42:23,586 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 01:42:23,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 01:42:23,740 INFO L208 MainTranslator]: Completed translation [2020-10-16 01:42:23,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23 WrapperNode [2020-10-16 01:42:23,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 01:42:23,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 01:42:23,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 01:42:23,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 01:42:23,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23" (1/1) ... [2020-10-16 01:42:23,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23" (1/1) ... [2020-10-16 01:42:23,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 01:42:23,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 01:42:23,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 01:42:23,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 01:42:23,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23" (1/1) ... [2020-10-16 01:42:23,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23" (1/1) ... [2020-10-16 01:42:23,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23" (1/1) ... [2020-10-16 01:42:23,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23" (1/1) ... [2020-10-16 01:42:23,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23" (1/1) ... [2020-10-16 01:42:23,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23" (1/1) ... [2020-10-16 01:42:23,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23" (1/1) ... [2020-10-16 01:42:23,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 01:42:23,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 01:42:23,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 01:42:23,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 01:42:23,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23" (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 01:42:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 01:42:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 01:42:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 01:42:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 01:42:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-16 01:42:23,897 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-16 01:42:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-16 01:42:23,898 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-16 01:42:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-16 01:42:23,898 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-16 01:42:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 01:42:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 01:42:23,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 01:42:23,900 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 01:42:24,251 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 01:42:24,251 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-16 01:42:24,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:42:24 BoogieIcfgContainer [2020-10-16 01:42:24,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 01:42:24,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 01:42:24,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 01:42:24,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 01:42:24,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:42:22" (1/3) ... [2020-10-16 01:42:24,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3771a788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:42:24, skipping insertion in model container [2020-10-16 01:42:24,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:23" (2/3) ... [2020-10-16 01:42:24,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3771a788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:42:24, skipping insertion in model container [2020-10-16 01:42:24,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:42:24" (3/3) ... [2020-10-16 01:42:24,262 INFO L111 eAbstractionObserver]: Analyzing ICFG safe021_tso.oepc.i [2020-10-16 01:42:24,273 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 01:42:24,279 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 01:42:24,280 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 01:42:24,306 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,306 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,306 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,306 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,307 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,307 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,308 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,308 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,308 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,308 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,309 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,309 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,309 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,310 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,310 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,311 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,311 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,311 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,316 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,317 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,317 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,318 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,326 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,327 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,327 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,327 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,334 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,334 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,334 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,335 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:24,359 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-16 01:42:24,375 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 01:42:24,375 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 01:42:24,375 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 01:42:24,375 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 01:42:24,376 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 01:42:24,376 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 01:42:24,376 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 01:42:24,376 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 01:42:24,388 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 155 flow [2020-10-16 01:42:24,430 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-10-16 01:42:24,431 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:42:24,435 INFO L80 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 67 events. 2/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-10-16 01:42:24,436 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 70 transitions, 155 flow [2020-10-16 01:42:24,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 121 flow [2020-10-16 01:42:24,443 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 01:42:24,446 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 56 transitions, 121 flow [2020-10-16 01:42:24,449 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 56 transitions, 121 flow [2020-10-16 01:42:24,449 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 56 transitions, 121 flow [2020-10-16 01:42:24,468 INFO L129 PetriNetUnfolder]: 1/56 cut-off events. [2020-10-16 01:42:24,469 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:42:24,469 INFO L80 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 56 events. 1/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2020-10-16 01:42:24,471 INFO L117 LiptonReduction]: Number of co-enabled transitions 864 [2020-10-16 01:42:25,796 INFO L132 LiptonReduction]: Checked pairs total: 1693 [2020-10-16 01:42:25,797 INFO L134 LiptonReduction]: Total number of compositions: 43 [2020-10-16 01:42:25,801 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1360 [2020-10-16 01:42:25,814 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2020-10-16 01:42:25,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:42:25,815 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:25,817 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:25,817 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:25,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:25,826 INFO L82 PathProgramCache]: Analyzing trace with hash 158172579, now seen corresponding path program 1 times [2020-10-16 01:42:25,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:25,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482248106] [2020-10-16 01:42:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:26,099 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 01:42:26,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482248106] [2020-10-16 01:42:26,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:26,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 01:42:26,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941716588] [2020-10-16 01:42:26,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:42:26,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:26,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:42:26,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:42:26,131 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 113 [2020-10-16 01:42:26,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 45 flow. Second operand 3 states. [2020-10-16 01:42:26,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:26,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 113 [2020-10-16 01:42:26,135 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:26,152 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2020-10-16 01:42:26,153 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:42:26,153 INFO L80 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 3/20 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2020-10-16 01:42:26,154 INFO L132 encePairwiseOnDemand]: 109/113 looper letters, 1 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2020-10-16 01:42:26,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 17 transitions, 49 flow [2020-10-16 01:42:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:42:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:42:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2020-10-16 01:42:26,171 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8849557522123894 [2020-10-16 01:42:26,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2020-10-16 01:42:26,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2020-10-16 01:42:26,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:26,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2020-10-16 01:42:26,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:42:26,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:42:26,187 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:42:26,189 INFO L185 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 3 states and 300 transitions. [2020-10-16 01:42:26,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 17 transitions, 49 flow [2020-10-16 01:42:26,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 17 transitions, 46 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-16 01:42:26,195 INFO L241 Difference]: Finished difference. Result has 27 places, 17 transitions, 48 flow [2020-10-16 01:42:26,198 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2020-10-16 01:42:26,199 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2020-10-16 01:42:26,199 INFO L481 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 48 flow [2020-10-16 01:42:26,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:42:26,200 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:26,200 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:26,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 01:42:26,200 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:26,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:26,201 INFO L82 PathProgramCache]: Analyzing trace with hash 608367391, now seen corresponding path program 1 times [2020-10-16 01:42:26,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:26,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250566202] [2020-10-16 01:42:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:26,287 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 01:42:26,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250566202] [2020-10-16 01:42:26,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:26,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:42:26,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70643976] [2020-10-16 01:42:26,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:42:26,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:26,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:42:26,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:42:26,296 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 113 [2020-10-16 01:42:26,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 48 flow. Second operand 4 states. [2020-10-16 01:42:26,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:26,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 113 [2020-10-16 01:42:26,297 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:26,325 INFO L129 PetriNetUnfolder]: 0/22 cut-off events. [2020-10-16 01:42:26,325 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-10-16 01:42:26,326 INFO L80 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 22 events. 0/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 2/24 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2020-10-16 01:42:26,326 INFO L132 encePairwiseOnDemand]: 109/113 looper letters, 1 selfloop transitions, 3 changer transitions 1/18 dead transitions. [2020-10-16 01:42:26,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 18 transitions, 63 flow [2020-10-16 01:42:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 01:42:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 01:42:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2020-10-16 01:42:26,333 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8296460176991151 [2020-10-16 01:42:26,333 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2020-10-16 01:42:26,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2020-10-16 01:42:26,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:26,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2020-10-16 01:42:26,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 01:42:26,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 01:42:26,338 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 01:42:26,338 INFO L185 Difference]: Start difference. First operand has 27 places, 17 transitions, 48 flow. Second operand 4 states and 375 transitions. [2020-10-16 01:42:26,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 18 transitions, 63 flow [2020-10-16 01:42:26,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 18 transitions, 57 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 01:42:26,340 INFO L241 Difference]: Finished difference. Result has 30 places, 17 transitions, 58 flow [2020-10-16 01:42:26,340 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=17} [2020-10-16 01:42:26,341 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2020-10-16 01:42:26,341 INFO L481 AbstractCegarLoop]: Abstraction has has 30 places, 17 transitions, 58 flow [2020-10-16 01:42:26,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:42:26,342 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:26,342 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:26,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 01:42:26,342 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:26,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:26,343 INFO L82 PathProgramCache]: Analyzing trace with hash 539795068, now seen corresponding path program 1 times [2020-10-16 01:42:26,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:26,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145938129] [2020-10-16 01:42:26,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:26,424 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 01:42:26,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145938129] [2020-10-16 01:42:26,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:26,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:42:26,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549928346] [2020-10-16 01:42:26,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:42:26,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:26,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:42:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:42:26,432 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 113 [2020-10-16 01:42:26,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 17 transitions, 58 flow. Second operand 4 states. [2020-10-16 01:42:26,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:26,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 113 [2020-10-16 01:42:26,434 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:26,488 INFO L129 PetriNetUnfolder]: 28/69 cut-off events. [2020-10-16 01:42:26,488 INFO L130 PetriNetUnfolder]: For 70/75 co-relation queries the response was YES. [2020-10-16 01:42:26,489 INFO L80 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 69 events. 28/69 cut-off events. For 70/75 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 214 event pairs, 12 based on Foata normal form. 10/75 useless extension candidates. Maximal degree in co-relation 154. Up to 45 conditions per place. [2020-10-16 01:42:26,490 INFO L132 encePairwiseOnDemand]: 107/113 looper letters, 5 selfloop transitions, 4 changer transitions 7/27 dead transitions. [2020-10-16 01:42:26,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 110 flow [2020-10-16 01:42:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 01:42:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 01:42:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 423 transitions. [2020-10-16 01:42:26,494 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7486725663716814 [2020-10-16 01:42:26,494 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 423 transitions. [2020-10-16 01:42:26,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 423 transitions. [2020-10-16 01:42:26,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:26,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 423 transitions. [2020-10-16 01:42:26,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 01:42:26,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 01:42:26,499 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 01:42:26,499 INFO L185 Difference]: Start difference. First operand has 30 places, 17 transitions, 58 flow. Second operand 5 states and 423 transitions. [2020-10-16 01:42:26,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 110 flow [2020-10-16 01:42:26,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 98 flow, removed 2 selfloop flow, removed 4 redundant places. [2020-10-16 01:42:26,501 INFO L241 Difference]: Finished difference. Result has 33 places, 20 transitions, 82 flow [2020-10-16 01:42:26,501 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=33, PETRI_TRANSITIONS=20} [2020-10-16 01:42:26,517 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2020-10-16 01:42:26,517 INFO L481 AbstractCegarLoop]: Abstraction has has 33 places, 20 transitions, 82 flow [2020-10-16 01:42:26,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:42:26,517 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:26,518 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:26,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 01:42:26,518 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:26,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:26,519 INFO L82 PathProgramCache]: Analyzing trace with hash -454159386, now seen corresponding path program 1 times [2020-10-16 01:42:26,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:26,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409964559] [2020-10-16 01:42:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:26,571 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 01:42:26,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409964559] [2020-10-16 01:42:26,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:26,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 01:42:26,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720285137] [2020-10-16 01:42:26,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 01:42:26,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:26,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 01:42:26,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 01:42:26,575 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 113 [2020-10-16 01:42:26,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 20 transitions, 82 flow. Second operand 5 states. [2020-10-16 01:42:26,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:26,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 113 [2020-10-16 01:42:26,576 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:26,636 INFO L129 PetriNetUnfolder]: 16/50 cut-off events. [2020-10-16 01:42:26,636 INFO L130 PetriNetUnfolder]: For 70/109 co-relation queries the response was YES. [2020-10-16 01:42:26,637 INFO L80 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 50 events. 16/50 cut-off events. For 70/109 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 129 event pairs, 2 based on Foata normal form. 14/62 useless extension candidates. Maximal degree in co-relation 165. Up to 35 conditions per place. [2020-10-16 01:42:26,638 INFO L132 encePairwiseOnDemand]: 107/113 looper letters, 5 selfloop transitions, 7 changer transitions 7/30 dead transitions. [2020-10-16 01:42:26,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 178 flow [2020-10-16 01:42:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 01:42:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 01:42:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 507 transitions. [2020-10-16 01:42:26,641 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7477876106194691 [2020-10-16 01:42:26,641 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 507 transitions. [2020-10-16 01:42:26,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 507 transitions. [2020-10-16 01:42:26,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:26,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 507 transitions. [2020-10-16 01:42:26,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 01:42:26,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 01:42:26,645 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 01:42:26,645 INFO L185 Difference]: Start difference. First operand has 33 places, 20 transitions, 82 flow. Second operand 6 states and 507 transitions. [2020-10-16 01:42:26,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 178 flow [2020-10-16 01:42:26,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 172 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 01:42:26,647 INFO L241 Difference]: Finished difference. Result has 37 places, 23 transitions, 132 flow [2020-10-16 01:42:26,648 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=132, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2020-10-16 01:42:26,648 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2020-10-16 01:42:26,648 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 132 flow [2020-10-16 01:42:26,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 01:42:26,648 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:26,649 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:26,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 01:42:26,649 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:26,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1608028988, now seen corresponding path program 1 times [2020-10-16 01:42:26,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:26,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427709363] [2020-10-16 01:42:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:42:26,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427709363] [2020-10-16 01:42:26,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:26,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 01:42:26,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054272566] [2020-10-16 01:42:26,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 01:42:26,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:26,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 01:42:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 01:42:26,727 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 113 [2020-10-16 01:42:26,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 132 flow. Second operand 6 states. [2020-10-16 01:42:26,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:26,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 113 [2020-10-16 01:42:26,728 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:26,785 INFO L129 PetriNetUnfolder]: 7/32 cut-off events. [2020-10-16 01:42:26,785 INFO L130 PetriNetUnfolder]: For 108/148 co-relation queries the response was YES. [2020-10-16 01:42:26,786 INFO L80 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 32 events. 7/32 cut-off events. For 108/148 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 49 event pairs, 0 based on Foata normal form. 16/47 useless extension candidates. Maximal degree in co-relation 123. Up to 20 conditions per place. [2020-10-16 01:42:26,786 INFO L132 encePairwiseOnDemand]: 107/113 looper letters, 2 selfloop transitions, 10 changer transitions 4/27 dead transitions. [2020-10-16 01:42:26,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 27 transitions, 200 flow [2020-10-16 01:42:26,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 01:42:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 01:42:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 585 transitions. [2020-10-16 01:42:26,789 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7395701643489254 [2020-10-16 01:42:26,789 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 585 transitions. [2020-10-16 01:42:26,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 585 transitions. [2020-10-16 01:42:26,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:26,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 585 transitions. [2020-10-16 01:42:26,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 01:42:26,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 01:42:26,793 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 01:42:26,793 INFO L185 Difference]: Start difference. First operand has 37 places, 23 transitions, 132 flow. Second operand 7 states and 585 transitions. [2020-10-16 01:42:26,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 27 transitions, 200 flow [2020-10-16 01:42:26,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 27 transitions, 164 flow, removed 14 selfloop flow, removed 4 redundant places. [2020-10-16 01:42:26,797 INFO L241 Difference]: Finished difference. Result has 40 places, 23 transitions, 134 flow [2020-10-16 01:42:26,797 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=40, PETRI_TRANSITIONS=23} [2020-10-16 01:42:26,797 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2020-10-16 01:42:26,797 INFO L481 AbstractCegarLoop]: Abstraction has has 40 places, 23 transitions, 134 flow [2020-10-16 01:42:26,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 01:42:26,798 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:26,798 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:26,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 01:42:26,798 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:26,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:26,799 INFO L82 PathProgramCache]: Analyzing trace with hash -668416849, now seen corresponding path program 1 times [2020-10-16 01:42:26,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:26,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062997204] [2020-10-16 01:42:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:26,834 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 01:42:26,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062997204] [2020-10-16 01:42:26,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:26,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 01:42:26,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146236637] [2020-10-16 01:42:26,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:42:26,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:26,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:42:26,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:42:26,837 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 113 [2020-10-16 01:42:26,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 23 transitions, 134 flow. Second operand 4 states. [2020-10-16 01:42:26,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:26,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 113 [2020-10-16 01:42:26,838 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:26,858 INFO L129 PetriNetUnfolder]: 10/41 cut-off events. [2020-10-16 01:42:26,858 INFO L130 PetriNetUnfolder]: For 88/96 co-relation queries the response was YES. [2020-10-16 01:42:26,858 INFO L80 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 41 events. 10/41 cut-off events. For 88/96 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 86 event pairs, 0 based on Foata normal form. 2/41 useless extension candidates. Maximal degree in co-relation 130. Up to 21 conditions per place. [2020-10-16 01:42:26,859 INFO L132 encePairwiseOnDemand]: 110/113 looper letters, 3 selfloop transitions, 1 changer transitions 1/24 dead transitions. [2020-10-16 01:42:26,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 24 transitions, 146 flow [2020-10-16 01:42:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 01:42:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 01:42:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 374 transitions. [2020-10-16 01:42:26,861 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.827433628318584 [2020-10-16 01:42:26,861 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 374 transitions. [2020-10-16 01:42:26,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 374 transitions. [2020-10-16 01:42:26,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:26,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 374 transitions. [2020-10-16 01:42:26,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 01:42:26,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 01:42:26,864 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 01:42:26,864 INFO L185 Difference]: Start difference. First operand has 40 places, 23 transitions, 134 flow. Second operand 4 states and 374 transitions. [2020-10-16 01:42:26,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 24 transitions, 146 flow [2020-10-16 01:42:26,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 24 transitions, 104 flow, removed 13 selfloop flow, removed 7 redundant places. [2020-10-16 01:42:26,867 INFO L241 Difference]: Finished difference. Result has 36 places, 23 transitions, 99 flow [2020-10-16 01:42:26,867 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=23} [2020-10-16 01:42:26,867 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2020-10-16 01:42:26,868 INFO L481 AbstractCegarLoop]: Abstraction has has 36 places, 23 transitions, 99 flow [2020-10-16 01:42:26,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:42:26,868 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:26,868 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:26,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 01:42:26,868 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1730857545, now seen corresponding path program 2 times [2020-10-16 01:42:26,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:26,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317459939] [2020-10-16 01:42:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:26,894 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 01:42:26,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317459939] [2020-10-16 01:42:26,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:26,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:42:26,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204319539] [2020-10-16 01:42:26,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:42:26,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:26,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:42:26,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:42:26,898 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 113 [2020-10-16 01:42:26,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 23 transitions, 99 flow. Second operand 3 states. [2020-10-16 01:42:26,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:26,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 113 [2020-10-16 01:42:26,898 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:26,908 INFO L129 PetriNetUnfolder]: 7/38 cut-off events. [2020-10-16 01:42:26,909 INFO L130 PetriNetUnfolder]: For 24/25 co-relation queries the response was YES. [2020-10-16 01:42:26,909 INFO L80 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 38 events. 7/38 cut-off events. For 24/25 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 2/39 useless extension candidates. Maximal degree in co-relation 94. Up to 12 conditions per place. [2020-10-16 01:42:26,909 INFO L132 encePairwiseOnDemand]: 110/113 looper letters, 0 selfloop transitions, 0 changer transitions 23/23 dead transitions. [2020-10-16 01:42:26,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 23 transitions, 105 flow [2020-10-16 01:42:26,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:42:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:42:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2020-10-16 01:42:26,911 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8466076696165191 [2020-10-16 01:42:26,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2020-10-16 01:42:26,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2020-10-16 01:42:26,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:26,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2020-10-16 01:42:26,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:42:26,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:42:26,914 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:42:26,914 INFO L185 Difference]: Start difference. First operand has 36 places, 23 transitions, 99 flow. Second operand 3 states and 287 transitions. [2020-10-16 01:42:26,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 23 transitions, 105 flow [2020-10-16 01:42:26,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 23 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 01:42:26,916 INFO L241 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2020-10-16 01:42:26,916 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2020-10-16 01:42:26,916 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 8 predicate places. [2020-10-16 01:42:26,916 INFO L481 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2020-10-16 01:42:26,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:42:26,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 01:42:26,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 01:42:26 BasicIcfg [2020-10-16 01:42:26,921 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 01:42:26,923 INFO L168 Benchmark]: Toolchain (without parser) took 3979.91 ms. Allocated memory was 245.9 MB in the beginning and 364.4 MB in the end (delta: 118.5 MB). Free memory was 201.0 MB in the beginning and 267.8 MB in the end (delta: -66.8 MB). Peak memory consumption was 51.7 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:26,924 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 245.9 MB. Free memory is still 222.3 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 01:42:26,925 INFO L168 Benchmark]: CACSL2BoogieTranslator took 797.45 ms. Allocated memory was 245.9 MB in the beginning and 298.3 MB in the end (delta: 52.4 MB). Free memory was 201.0 MB in the beginning and 249.2 MB in the end (delta: -48.2 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:26,926 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.13 ms. Allocated memory is still 298.3 MB. Free memory was 249.2 MB in the beginning and 246.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:26,927 INFO L168 Benchmark]: Boogie Preprocessor took 23.15 ms. Allocated memory is still 298.3 MB. Free memory was 246.7 MB in the beginning and 244.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:26,927 INFO L168 Benchmark]: RCFGBuilder took 425.88 ms. Allocated memory is still 298.3 MB. Free memory was 244.2 MB in the beginning and 222.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:26,928 INFO L168 Benchmark]: TraceAbstraction took 2666.00 ms. Allocated memory was 298.3 MB in the beginning and 364.4 MB in the end (delta: 66.1 MB). Free memory was 222.4 MB in the beginning and 267.8 MB in the end (delta: -45.4 MB). Peak memory consumption was 20.6 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:26,932 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 245.9 MB. Free memory is still 222.3 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 797.45 ms. Allocated memory was 245.9 MB in the beginning and 298.3 MB in the end (delta: 52.4 MB). Free memory was 201.0 MB in the beginning and 249.2 MB in the end (delta: -48.2 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 62.13 ms. Allocated memory is still 298.3 MB. Free memory was 249.2 MB in the beginning and 246.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 23.15 ms. Allocated memory is still 298.3 MB. Free memory was 246.7 MB in the beginning and 244.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 425.88 ms. Allocated memory is still 298.3 MB. Free memory was 244.2 MB in the beginning and 222.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2666.00 ms. Allocated memory was 298.3 MB in the beginning and 364.4 MB in the end (delta: 66.1 MB). Free memory was 222.4 MB in the beginning and 267.8 MB in the end (delta: -45.4 MB). Peak memory consumption was 20.6 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 605 VarBasedMoverChecksPositive, 46 VarBasedMoverChecksNegative, 7 SemBasedMoverChecksPositive, 39 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 92 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 65 PlacesBefore, 27 PlacesAfterwards, 56 TransitionsBefore, 18 TransitionsAfterwards, 864 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 43 TotalNumberOfCompositions, 1693 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, 69 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 23 SDtfs, 12 SDslu, 12 SDs, 0 SdLazy, 107 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 2405 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...