/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-SemanticLooper.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 03:23:56,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 03:23:56,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 03:23:57,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 03:23:57,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 03:23:57,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 03:23:57,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 03:23:57,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 03:23:57,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 03:23:57,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 03:23:57,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 03:23:57,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 03:23:57,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 03:23:57,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 03:23:57,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 03:23:57,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 03:23:57,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 03:23:57,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 03:23:57,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 03:23:57,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 03:23:57,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 03:23:57,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 03:23:57,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 03:23:57,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 03:23:57,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 03:23:57,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 03:23:57,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 03:23:57,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 03:23:57,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 03:23:57,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 03:23:57,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 03:23:57,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 03:23:57,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 03:23:57,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 03:23:57,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 03:23:57,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 03:23:57,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 03:23:57,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 03:23:57,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 03:23:57,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 03:23:57,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 03:23:57,050 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-SemanticLooper.epf [2020-10-16 03:23:57,102 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 03:23:57,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 03:23:57,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 03:23:57,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 03:23:57,108 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 03:23:57,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 03:23:57,108 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 03:23:57,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 03:23:57,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 03:23:57,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 03:23:57,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 03:23:57,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 03:23:57,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 03:23:57,111 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 03:23:57,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 03:23:57,112 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 03:23:57,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 03:23:57,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 03:23:57,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 03:23:57,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 03:23:57,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 03:23:57,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 03:23:57,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 03:23:57,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 03:23:57,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 03:23:57,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 03:23:57,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 03:23:57,116 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 03:23:57,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 03:23:57,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 03:23:57,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 03:23:57,419 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 03:23:57,423 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 03:23:57,423 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 03:23:57,424 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-10-16 03:23:57,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aa58a2af/29cc0466f7bc4d0bb93e55684a755e1e/FLAGd8e990b30 [2020-10-16 03:23:58,010 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 03:23:58,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-10-16 03:23:58,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aa58a2af/29cc0466f7bc4d0bb93e55684a755e1e/FLAGd8e990b30 [2020-10-16 03:23:58,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aa58a2af/29cc0466f7bc4d0bb93e55684a755e1e [2020-10-16 03:23:58,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 03:23:58,322 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 03:23:58,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 03:23:58,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 03:23:58,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 03:23:58,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:23:58" (1/1) ... [2020-10-16 03:23:58,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba989d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:58, skipping insertion in model container [2020-10-16 03:23:58,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:23:58" (1/1) ... [2020-10-16 03:23:58,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 03:23:58,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 03:23:58,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 03:23:58,883 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 03:23:58,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 03:23:59,017 INFO L208 MainTranslator]: Completed translation [2020-10-16 03:23:59,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59 WrapperNode [2020-10-16 03:23:59,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 03:23:59,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 03:23:59,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 03:23:59,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 03:23:59,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59" (1/1) ... [2020-10-16 03:23:59,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59" (1/1) ... [2020-10-16 03:23:59,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 03:23:59,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 03:23:59,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 03:23:59,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 03:23:59,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59" (1/1) ... [2020-10-16 03:23:59,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59" (1/1) ... [2020-10-16 03:23:59,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59" (1/1) ... [2020-10-16 03:23:59,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59" (1/1) ... [2020-10-16 03:23:59,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59" (1/1) ... [2020-10-16 03:23:59,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59" (1/1) ... [2020-10-16 03:23:59,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59" (1/1) ... [2020-10-16 03:23:59,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 03:23:59,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 03:23:59,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 03:23:59,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 03:23:59,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59" (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 03:23:59,184 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 03:23:59,185 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 03:23:59,185 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 03:23:59,185 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 03:23:59,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 03:23:59,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 03:23:59,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 03:23:59,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 03:23:59,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 03:23:59,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 03:23:59,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 03:23:59,189 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 03:23:59,469 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 03:23:59,469 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 03:23:59,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:23:59 BoogieIcfgContainer [2020-10-16 03:23:59,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 03:23:59,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 03:23:59,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 03:23:59,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 03:23:59,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:23:58" (1/3) ... [2020-10-16 03:23:59,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32245a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:23:59, skipping insertion in model container [2020-10-16 03:23:59,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:23:59" (2/3) ... [2020-10-16 03:23:59,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32245a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:23:59, skipping insertion in model container [2020-10-16 03:23:59,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:23:59" (3/3) ... [2020-10-16 03:23:59,482 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-10-16 03:23:59,498 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 03:23:59,507 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 03:23:59,508 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 03:23:59,540 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,541 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,541 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,541 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,542 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,542 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,543 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,543 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,543 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,544 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,544 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,545 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,546 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,546 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,547 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,547 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,547 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,548 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,548 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,548 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,554 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,555 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,555 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,555 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,556 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,556 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,562 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,563 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,563 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,563 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,563 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,564 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:23:59,584 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 03:23:59,607 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 03:23:59,607 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 03:23:59,608 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 03:23:59,608 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 03:23:59,608 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 03:23:59,608 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 03:23:59,608 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 03:23:59,608 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 03:23:59,622 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 03:23:59,673 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 03:23:59,673 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:23:59,685 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 03:23:59,685 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 03:23:59,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 112 flow [2020-10-16 03:23:59,698 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 03:23:59,701 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions, 112 flow [2020-10-16 03:23:59,704 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 53 transitions, 112 flow [2020-10-16 03:23:59,705 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 112 flow [2020-10-16 03:23:59,724 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 03:23:59,725 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:23:59,725 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 03:23:59,728 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 03:24:00,773 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 03:24:00,989 INFO L132 LiptonReduction]: Checked pairs total: 881 [2020-10-16 03:24:00,990 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 03:24:00,993 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1297 [2020-10-16 03:24:01,000 INFO L129 PetriNetUnfolder]: 2/12 cut-off events. [2020-10-16 03:24:01,001 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:24:01,001 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:01,002 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 03:24:01,002 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:01,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:01,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 03:24:01,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:01,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090819427] [2020-10-16 03:24:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:01,225 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 03:24:01,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090819427] [2020-10-16 03:24:01,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:24:01,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 03:24:01,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403841883] [2020-10-16 03:24:01,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 03:24:01,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:01,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 03:24:01,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 03:24:01,258 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:01,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 32 flow. Second operand 4 states. [2020-10-16 03:24:01,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:01,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:01,263 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:01,339 INFO L129 PetriNetUnfolder]: 29/61 cut-off events. [2020-10-16 03:24:01,340 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:24:01,340 INFO L80 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 61 events. 29/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 148 event pairs, 4 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 106. Up to 28 conditions per place. [2020-10-16 03:24:01,342 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 7 selfloop transitions, 5 changer transitions 3/22 dead transitions. [2020-10-16 03:24:01,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 80 flow [2020-10-16 03:24:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 03:24:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 03:24:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2020-10-16 03:24:01,361 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.684 [2020-10-16 03:24:01,362 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 342 transitions. [2020-10-16 03:24:01,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 342 transitions. [2020-10-16 03:24:01,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:01,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 342 transitions. [2020-10-16 03:24:01,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 03:24:01,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 03:24:01,380 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 03:24:01,383 INFO L185 Difference]: Start difference. First operand has 18 places, 13 transitions, 32 flow. Second operand 5 states and 342 transitions. [2020-10-16 03:24:01,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 80 flow [2020-10-16 03:24:01,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 22 transitions, 78 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 03:24:01,389 INFO L241 Difference]: Finished difference. Result has 23 places, 16 transitions, 65 flow [2020-10-16 03:24:01,392 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=65, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2020-10-16 03:24:01,393 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2020-10-16 03:24:01,393 INFO L481 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 65 flow [2020-10-16 03:24:01,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 03:24:01,393 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:01,393 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:01,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 03:24:01,394 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:01,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:01,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2130400634, now seen corresponding path program 1 times [2020-10-16 03:24:01,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:01,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356357074] [2020-10-16 03:24:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:01,526 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 03:24:01,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356357074] [2020-10-16 03:24:01,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:24:01,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 03:24:01,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013448093] [2020-10-16 03:24:01,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 03:24:01,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:01,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 03:24:01,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 03:24:01,533 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:01,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 65 flow. Second operand 5 states. [2020-10-16 03:24:01,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:01,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:01,535 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:01,573 INFO L129 PetriNetUnfolder]: 17/42 cut-off events. [2020-10-16 03:24:01,574 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2020-10-16 03:24:01,574 INFO L80 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 42 events. 17/42 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 112. Up to 21 conditions per place. [2020-10-16 03:24:01,575 INFO L132 encePairwiseOnDemand]: 96/100 looper letters, 12 selfloop transitions, 6 changer transitions 0/25 dead transitions. [2020-10-16 03:24:01,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 25 transitions, 147 flow [2020-10-16 03:24:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 03:24:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 03:24:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 271 transitions. [2020-10-16 03:24:01,578 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6775 [2020-10-16 03:24:01,578 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 271 transitions. [2020-10-16 03:24:01,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 271 transitions. [2020-10-16 03:24:01,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:01,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 271 transitions. [2020-10-16 03:24:01,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 03:24:01,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 03:24:01,582 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 03:24:01,582 INFO L185 Difference]: Start difference. First operand has 23 places, 16 transitions, 65 flow. Second operand 4 states and 271 transitions. [2020-10-16 03:24:01,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 25 transitions, 147 flow [2020-10-16 03:24:01,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 03:24:01,584 INFO L241 Difference]: Finished difference. Result has 26 places, 21 transitions, 114 flow [2020-10-16 03:24:01,585 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2020-10-16 03:24:01,585 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 8 predicate places. [2020-10-16 03:24:01,586 INFO L481 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 114 flow [2020-10-16 03:24:01,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 03:24:01,586 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:01,586 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:01,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 03:24:01,587 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:01,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:01,587 INFO L82 PathProgramCache]: Analyzing trace with hash 993324059, now seen corresponding path program 1 times [2020-10-16 03:24:01,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:01,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386385420] [2020-10-16 03:24:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:01,657 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 03:24:01,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386385420] [2020-10-16 03:24:01,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:24:01,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 03:24:01,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032085546] [2020-10-16 03:24:01,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 03:24:01,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:01,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 03:24:01,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 03:24:01,662 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:01,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 114 flow. Second operand 6 states. [2020-10-16 03:24:01,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:01,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:01,663 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:01,754 INFO L129 PetriNetUnfolder]: 28/67 cut-off events. [2020-10-16 03:24:01,754 INFO L130 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2020-10-16 03:24:01,755 INFO L80 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 67 events. 28/67 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 157 event pairs, 0 based on Foata normal form. 2/68 useless extension candidates. Maximal degree in co-relation 217. Up to 23 conditions per place. [2020-10-16 03:24:01,756 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 13 selfloop transitions, 17 changer transitions 0/37 dead transitions. [2020-10-16 03:24:01,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 270 flow [2020-10-16 03:24:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 03:24:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 03:24:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 542 transitions. [2020-10-16 03:24:01,760 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6775 [2020-10-16 03:24:01,760 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 542 transitions. [2020-10-16 03:24:01,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 542 transitions. [2020-10-16 03:24:01,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:01,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 542 transitions. [2020-10-16 03:24:01,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 03:24:01,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 03:24:01,765 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 03:24:01,765 INFO L185 Difference]: Start difference. First operand has 26 places, 21 transitions, 114 flow. Second operand 8 states and 542 transitions. [2020-10-16 03:24:01,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 270 flow [2020-10-16 03:24:01,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 268 flow, removed 1 selfloop flow, removed 0 redundant places. [2020-10-16 03:24:01,769 INFO L241 Difference]: Finished difference. Result has 37 places, 31 transitions, 245 flow [2020-10-16 03:24:01,770 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2020-10-16 03:24:01,770 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 19 predicate places. [2020-10-16 03:24:01,770 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 245 flow [2020-10-16 03:24:01,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 03:24:01,771 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:01,771 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:01,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 03:24:01,771 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1383900809, now seen corresponding path program 2 times [2020-10-16 03:24:01,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:01,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531503166] [2020-10-16 03:24:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:01,843 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 03:24:01,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531503166] [2020-10-16 03:24:01,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:24:01,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 03:24:01,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590764501] [2020-10-16 03:24:01,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 03:24:01,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:01,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 03:24:01,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 03:24:01,864 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:01,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 245 flow. Second operand 6 states. [2020-10-16 03:24:01,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:01,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:01,865 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:01,986 INFO L129 PetriNetUnfolder]: 25/61 cut-off events. [2020-10-16 03:24:01,987 INFO L130 PetriNetUnfolder]: For 207/213 co-relation queries the response was YES. [2020-10-16 03:24:01,988 INFO L80 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 61 events. 25/61 cut-off events. For 207/213 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 149 event pairs, 0 based on Foata normal form. 4/64 useless extension candidates. Maximal degree in co-relation 276. Up to 23 conditions per place. [2020-10-16 03:24:01,989 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 12 selfloop transitions, 18 changer transitions 0/37 dead transitions. [2020-10-16 03:24:01,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 371 flow [2020-10-16 03:24:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 03:24:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 03:24:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2020-10-16 03:24:01,994 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6771428571428572 [2020-10-16 03:24:01,996 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2020-10-16 03:24:01,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2020-10-16 03:24:01,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:01,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2020-10-16 03:24:02,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 03:24:02,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 03:24:02,003 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 03:24:02,003 INFO L185 Difference]: Start difference. First operand has 37 places, 31 transitions, 245 flow. Second operand 7 states and 474 transitions. [2020-10-16 03:24:02,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 371 flow [2020-10-16 03:24:02,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 338 flow, removed 9 selfloop flow, removed 3 redundant places. [2020-10-16 03:24:02,009 INFO L241 Difference]: Finished difference. Result has 42 places, 32 transitions, 280 flow [2020-10-16 03:24:02,009 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=280, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2020-10-16 03:24:02,010 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 24 predicate places. [2020-10-16 03:24:02,010 INFO L481 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 280 flow [2020-10-16 03:24:02,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 03:24:02,010 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:02,010 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:02,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 03:24:02,011 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:02,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:02,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1013031689, now seen corresponding path program 3 times [2020-10-16 03:24:02,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:02,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697978656] [2020-10-16 03:24:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:02,063 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 03:24:02,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697978656] [2020-10-16 03:24:02,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:24:02,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 03:24:02,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846752444] [2020-10-16 03:24:02,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 03:24:02,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:02,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 03:24:02,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 03:24:02,067 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:02,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 280 flow. Second operand 6 states. [2020-10-16 03:24:02,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:02,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:02,068 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:02,152 INFO L129 PetriNetUnfolder]: 30/73 cut-off events. [2020-10-16 03:24:02,153 INFO L130 PetriNetUnfolder]: For 319/325 co-relation queries the response was YES. [2020-10-16 03:24:02,153 INFO L80 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 73 events. 30/73 cut-off events. For 319/325 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 207 event pairs, 0 based on Foata normal form. 2/75 useless extension candidates. Maximal degree in co-relation 357. Up to 34 conditions per place. [2020-10-16 03:24:02,155 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 21 selfloop transitions, 16 changer transitions 0/44 dead transitions. [2020-10-16 03:24:02,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 484 flow [2020-10-16 03:24:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 03:24:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 03:24:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2020-10-16 03:24:02,157 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6771428571428572 [2020-10-16 03:24:02,158 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2020-10-16 03:24:02,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2020-10-16 03:24:02,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:02,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2020-10-16 03:24:02,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 03:24:02,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 03:24:02,161 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 03:24:02,161 INFO L185 Difference]: Start difference. First operand has 42 places, 32 transitions, 280 flow. Second operand 7 states and 474 transitions. [2020-10-16 03:24:02,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 484 flow [2020-10-16 03:24:02,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 434 flow, removed 8 selfloop flow, removed 5 redundant places. [2020-10-16 03:24:02,166 INFO L241 Difference]: Finished difference. Result has 46 places, 39 transitions, 370 flow [2020-10-16 03:24:02,167 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2020-10-16 03:24:02,167 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 28 predicate places. [2020-10-16 03:24:02,167 INFO L481 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 370 flow [2020-10-16 03:24:02,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 03:24:02,167 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:02,168 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:02,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 03:24:02,168 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:02,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash 728810004, now seen corresponding path program 4 times [2020-10-16 03:24:02,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:02,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161649237] [2020-10-16 03:24:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:02,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161649237] [2020-10-16 03:24:02,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253961273] [2020-10-16 03:24:02,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:02,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:02,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 03:24:02,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:02,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:02,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:02,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 03:24:02,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37481246] [2020-10-16 03:24:02,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:24:02,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:24:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:24:02,388 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:02,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 370 flow. Second operand 8 states. [2020-10-16 03:24:02,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:02,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:02,389 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:02,524 INFO L129 PetriNetUnfolder]: 33/80 cut-off events. [2020-10-16 03:24:02,524 INFO L130 PetriNetUnfolder]: For 371/376 co-relation queries the response was YES. [2020-10-16 03:24:02,525 INFO L80 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 80 events. 33/80 cut-off events. For 371/376 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 232 event pairs, 0 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 411. Up to 33 conditions per place. [2020-10-16 03:24:02,527 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 13 selfloop transitions, 28 changer transitions 0/48 dead transitions. [2020-10-16 03:24:02,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 566 flow [2020-10-16 03:24:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 03:24:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 03:24:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 541 transitions. [2020-10-16 03:24:02,530 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67625 [2020-10-16 03:24:02,530 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 541 transitions. [2020-10-16 03:24:02,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 541 transitions. [2020-10-16 03:24:02,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:02,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 541 transitions. [2020-10-16 03:24:02,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 03:24:02,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 03:24:02,535 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 03:24:02,535 INFO L185 Difference]: Start difference. First operand has 46 places, 39 transitions, 370 flow. Second operand 8 states and 541 transitions. [2020-10-16 03:24:02,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 566 flow [2020-10-16 03:24:02,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 548 flow, removed 5 selfloop flow, removed 1 redundant places. [2020-10-16 03:24:02,541 INFO L241 Difference]: Finished difference. Result has 54 places, 42 transitions, 474 flow [2020-10-16 03:24:02,542 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=474, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2020-10-16 03:24:02,542 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 36 predicate places. [2020-10-16 03:24:02,542 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 474 flow [2020-10-16 03:24:02,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:24:02,543 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:02,543 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:02,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 03:24:02,757 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:02,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1735406889, now seen corresponding path program 5 times [2020-10-16 03:24:02,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:02,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028964676] [2020-10-16 03:24:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:02,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028964676] [2020-10-16 03:24:02,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608927245] [2020-10-16 03:24:02,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:02,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:02,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 03:24:02,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:02,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:02,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 03:24:02,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535204171] [2020-10-16 03:24:02,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 03:24:02,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:02,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 03:24:02,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 03:24:02,921 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:02,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 474 flow. Second operand 7 states. [2020-10-16 03:24:02,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:02,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:02,922 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:03,011 INFO L129 PetriNetUnfolder]: 35/85 cut-off events. [2020-10-16 03:24:03,011 INFO L130 PetriNetUnfolder]: For 593/602 co-relation queries the response was YES. [2020-10-16 03:24:03,012 INFO L80 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 85 events. 35/85 cut-off events. For 593/602 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 245 event pairs, 0 based on Foata normal form. 11/96 useless extension candidates. Maximal degree in co-relation 490. Up to 44 conditions per place. [2020-10-16 03:24:03,013 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 28 selfloop transitions, 15 changer transitions 0/50 dead transitions. [2020-10-16 03:24:03,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 674 flow [2020-10-16 03:24:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 03:24:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 03:24:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 540 transitions. [2020-10-16 03:24:03,016 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:24:03,016 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 540 transitions. [2020-10-16 03:24:03,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 540 transitions. [2020-10-16 03:24:03,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:03,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 540 transitions. [2020-10-16 03:24:03,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 03:24:03,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 03:24:03,020 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 03:24:03,020 INFO L185 Difference]: Start difference. First operand has 54 places, 42 transitions, 474 flow. Second operand 8 states and 540 transitions. [2020-10-16 03:24:03,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 674 flow [2020-10-16 03:24:03,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 622 flow, removed 8 selfloop flow, removed 5 redundant places. [2020-10-16 03:24:03,028 INFO L241 Difference]: Finished difference. Result has 59 places, 45 transitions, 509 flow [2020-10-16 03:24:03,028 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=509, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2020-10-16 03:24:03,028 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 41 predicate places. [2020-10-16 03:24:03,028 INFO L481 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 509 flow [2020-10-16 03:24:03,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 03:24:03,029 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:03,029 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:03,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:03,244 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:03,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1339228555, now seen corresponding path program 6 times [2020-10-16 03:24:03,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:03,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687751362] [2020-10-16 03:24:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:03,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687751362] [2020-10-16 03:24:03,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839034760] [2020-10-16 03:24:03,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:03,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 03:24:03,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:03,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:24:03,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:03,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:03,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 03:24:03,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587502983] [2020-10-16 03:24:03,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:24:03,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:03,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:24:03,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:24:03,406 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:03,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 509 flow. Second operand 8 states. [2020-10-16 03:24:03,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:03,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:03,408 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:03,655 INFO L129 PetriNetUnfolder]: 39/95 cut-off events. [2020-10-16 03:24:03,655 INFO L130 PetriNetUnfolder]: For 807/809 co-relation queries the response was YES. [2020-10-16 03:24:03,656 INFO L80 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 95 events. 39/95 cut-off events. For 807/809 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 296 event pairs, 0 based on Foata normal form. 4/99 useless extension candidates. Maximal degree in co-relation 579. Up to 43 conditions per place. [2020-10-16 03:24:03,658 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 25 selfloop transitions, 24 changer transitions 0/56 dead transitions. [2020-10-16 03:24:03,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 789 flow [2020-10-16 03:24:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 03:24:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-16 03:24:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 744 transitions. [2020-10-16 03:24:03,662 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6763636363636364 [2020-10-16 03:24:03,662 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 744 transitions. [2020-10-16 03:24:03,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 744 transitions. [2020-10-16 03:24:03,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:03,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 744 transitions. [2020-10-16 03:24:03,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-16 03:24:03,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-16 03:24:03,667 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-16 03:24:03,667 INFO L185 Difference]: Start difference. First operand has 59 places, 45 transitions, 509 flow. Second operand 11 states and 744 transitions. [2020-10-16 03:24:03,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 789 flow [2020-10-16 03:24:03,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 56 transitions, 722 flow, removed 25 selfloop flow, removed 3 redundant places. [2020-10-16 03:24:03,678 INFO L241 Difference]: Finished difference. Result has 69 places, 49 transitions, 594 flow [2020-10-16 03:24:03,678 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=594, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2020-10-16 03:24:03,678 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 51 predicate places. [2020-10-16 03:24:03,678 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 594 flow [2020-10-16 03:24:03,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:24:03,679 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:03,679 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:03,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:03,894 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:03,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:03,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1051578980, now seen corresponding path program 7 times [2020-10-16 03:24:03,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:03,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285838945] [2020-10-16 03:24:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:03,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285838945] [2020-10-16 03:24:03,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884278258] [2020-10-16 03:24:03,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:04,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:24:04,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:04,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:04,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 03:24:04,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145039191] [2020-10-16 03:24:04,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:24:04,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:04,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:24:04,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:24:04,028 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:04,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 594 flow. Second operand 8 states. [2020-10-16 03:24:04,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:04,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:04,029 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:04,157 INFO L129 PetriNetUnfolder]: 41/102 cut-off events. [2020-10-16 03:24:04,158 INFO L130 PetriNetUnfolder]: For 952/961 co-relation queries the response was YES. [2020-10-16 03:24:04,158 INFO L80 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 102 events. 41/102 cut-off events. For 952/961 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 329 event pairs, 0 based on Foata normal form. 7/109 useless extension candidates. Maximal degree in co-relation 656. Up to 47 conditions per place. [2020-10-16 03:24:04,160 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 25 selfloop transitions, 26 changer transitions 0/58 dead transitions. [2020-10-16 03:24:04,160 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 58 transitions, 858 flow [2020-10-16 03:24:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 03:24:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-16 03:24:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 675 transitions. [2020-10-16 03:24:04,163 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:24:04,164 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 675 transitions. [2020-10-16 03:24:04,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 675 transitions. [2020-10-16 03:24:04,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:04,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 675 transitions. [2020-10-16 03:24:04,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-16 03:24:04,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-16 03:24:04,168 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-16 03:24:04,168 INFO L185 Difference]: Start difference. First operand has 69 places, 49 transitions, 594 flow. Second operand 10 states and 675 transitions. [2020-10-16 03:24:04,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 58 transitions, 858 flow [2020-10-16 03:24:04,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 58 transitions, 785 flow, removed 22 selfloop flow, removed 5 redundant places. [2020-10-16 03:24:04,177 INFO L241 Difference]: Finished difference. Result has 75 places, 51 transitions, 632 flow [2020-10-16 03:24:04,177 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=632, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2020-10-16 03:24:04,178 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 57 predicate places. [2020-10-16 03:24:04,178 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 632 flow [2020-10-16 03:24:04,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:24:04,178 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:04,178 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:04,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:04,393 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:04,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:04,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1117784062, now seen corresponding path program 8 times [2020-10-16 03:24:04,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:04,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602394767] [2020-10-16 03:24:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:04,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602394767] [2020-10-16 03:24:04,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979949697] [2020-10-16 03:24:04,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:04,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:04,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:04,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:24:04,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:04,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:04,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:04,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 03:24:04,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117229457] [2020-10-16 03:24:04,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:24:04,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:24:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:24:04,552 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:04,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 632 flow. Second operand 9 states. [2020-10-16 03:24:04,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:04,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:04,553 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:04,730 INFO L129 PetriNetUnfolder]: 45/114 cut-off events. [2020-10-16 03:24:04,731 INFO L130 PetriNetUnfolder]: For 1113/1115 co-relation queries the response was YES. [2020-10-16 03:24:04,731 INFO L80 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 114 events. 45/114 cut-off events. For 1113/1115 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 396 event pairs, 0 based on Foata normal form. 4/118 useless extension candidates. Maximal degree in co-relation 756. Up to 55 conditions per place. [2020-10-16 03:24:04,733 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 23 selfloop transitions, 32 changer transitions 0/62 dead transitions. [2020-10-16 03:24:04,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 62 transitions, 936 flow [2020-10-16 03:24:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 03:24:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-16 03:24:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 743 transitions. [2020-10-16 03:24:04,737 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754545454545454 [2020-10-16 03:24:04,737 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 743 transitions. [2020-10-16 03:24:04,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 743 transitions. [2020-10-16 03:24:04,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:04,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 743 transitions. [2020-10-16 03:24:04,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-16 03:24:04,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-16 03:24:04,742 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-16 03:24:04,742 INFO L185 Difference]: Start difference. First operand has 75 places, 51 transitions, 632 flow. Second operand 11 states and 743 transitions. [2020-10-16 03:24:04,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 62 transitions, 936 flow [2020-10-16 03:24:04,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 62 transitions, 857 flow, removed 18 selfloop flow, removed 7 redundant places. [2020-10-16 03:24:04,752 INFO L241 Difference]: Finished difference. Result has 80 places, 55 transitions, 714 flow [2020-10-16 03:24:04,752 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=714, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2020-10-16 03:24:04,753 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 62 predicate places. [2020-10-16 03:24:04,753 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 714 flow [2020-10-16 03:24:04,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:24:04,753 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:04,753 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:04,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 03:24:04,969 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:04,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:04,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1510678266, now seen corresponding path program 9 times [2020-10-16 03:24:04,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:04,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405572969] [2020-10-16 03:24:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:05,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405572969] [2020-10-16 03:24:05,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207565777] [2020-10-16 03:24:05,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:05,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 03:24:05,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:05,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 03:24:05,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:05,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:05,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 03:24:05,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874745529] [2020-10-16 03:24:05,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:24:05,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:05,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:24:05,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:24:05,105 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:05,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 714 flow. Second operand 8 states. [2020-10-16 03:24:05,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:05,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:05,106 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:05,286 INFO L129 PetriNetUnfolder]: 56/139 cut-off events. [2020-10-16 03:24:05,286 INFO L130 PetriNetUnfolder]: For 1641/1643 co-relation queries the response was YES. [2020-10-16 03:24:05,287 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 139 events. 56/139 cut-off events. For 1641/1643 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 496 event pairs, 0 based on Foata normal form. 2/141 useless extension candidates. Maximal degree in co-relation 998. Up to 73 conditions per place. [2020-10-16 03:24:05,289 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 19 selfloop transitions, 47 changer transitions 0/73 dead transitions. [2020-10-16 03:24:05,289 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 73 transitions, 1192 flow [2020-10-16 03:24:05,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:24:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:24:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 812 transitions. [2020-10-16 03:24:05,293 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6766666666666666 [2020-10-16 03:24:05,293 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 812 transitions. [2020-10-16 03:24:05,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 812 transitions. [2020-10-16 03:24:05,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:05,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 812 transitions. [2020-10-16 03:24:05,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:24:05,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:24:05,298 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:24:05,298 INFO L185 Difference]: Start difference. First operand has 80 places, 55 transitions, 714 flow. Second operand 12 states and 812 transitions. [2020-10-16 03:24:05,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 73 transitions, 1192 flow [2020-10-16 03:24:05,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 73 transitions, 1061 flow, removed 38 selfloop flow, removed 9 redundant places. [2020-10-16 03:24:05,310 INFO L241 Difference]: Finished difference. Result has 86 places, 63 transitions, 894 flow [2020-10-16 03:24:05,310 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=894, PETRI_PLACES=86, PETRI_TRANSITIONS=63} [2020-10-16 03:24:05,311 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 68 predicate places. [2020-10-16 03:24:05,311 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 63 transitions, 894 flow [2020-10-16 03:24:05,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:24:05,311 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:05,311 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:05,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:05,528 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:05,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:05,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1118290912, now seen corresponding path program 10 times [2020-10-16 03:24:05,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:05,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597447990] [2020-10-16 03:24:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:05,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597447990] [2020-10-16 03:24:05,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528256509] [2020-10-16 03:24:05,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:05,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:05,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:05,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:24:05,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:05,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:05,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:05,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 03:24:05,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144052077] [2020-10-16 03:24:05,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:24:05,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:05,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:24:05,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:24:05,712 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:05,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 63 transitions, 894 flow. Second operand 9 states. [2020-10-16 03:24:05,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:05,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:05,713 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:05,957 INFO L129 PetriNetUnfolder]: 53/133 cut-off events. [2020-10-16 03:24:05,957 INFO L130 PetriNetUnfolder]: For 1900/1906 co-relation queries the response was YES. [2020-10-16 03:24:05,959 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 133 events. 53/133 cut-off events. For 1900/1906 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 490 event pairs, 0 based on Foata normal form. 8/141 useless extension candidates. Maximal degree in co-relation 1022. Up to 69 conditions per place. [2020-10-16 03:24:05,961 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 16 selfloop transitions, 50 changer transitions 0/73 dead transitions. [2020-10-16 03:24:05,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 73 transitions, 1256 flow [2020-10-16 03:24:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 03:24:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 03:24:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 879 transitions. [2020-10-16 03:24:05,965 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6761538461538461 [2020-10-16 03:24:05,965 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 879 transitions. [2020-10-16 03:24:05,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 879 transitions. [2020-10-16 03:24:05,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:05,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 879 transitions. [2020-10-16 03:24:05,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 03:24:05,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 03:24:05,971 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 03:24:05,971 INFO L185 Difference]: Start difference. First operand has 86 places, 63 transitions, 894 flow. Second operand 13 states and 879 transitions. [2020-10-16 03:24:05,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 73 transitions, 1256 flow [2020-10-16 03:24:05,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 73 transitions, 1123 flow, removed 38 selfloop flow, removed 7 redundant places. [2020-10-16 03:24:05,985 INFO L241 Difference]: Finished difference. Result has 93 places, 64 transitions, 922 flow [2020-10-16 03:24:05,985 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=922, PETRI_PLACES=93, PETRI_TRANSITIONS=64} [2020-10-16 03:24:05,986 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 75 predicate places. [2020-10-16 03:24:05,986 INFO L481 AbstractCegarLoop]: Abstraction has has 93 places, 64 transitions, 922 flow [2020-10-16 03:24:05,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:24:05,986 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:05,986 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:06,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:06,200 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:06,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1433571448, now seen corresponding path program 11 times [2020-10-16 03:24:06,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:06,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098199328] [2020-10-16 03:24:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:06,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098199328] [2020-10-16 03:24:06,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574335133] [2020-10-16 03:24:06,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:06,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:06,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:24:06,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:06,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:06,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:06,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 03:24:06,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93743484] [2020-10-16 03:24:06,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:24:06,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:06,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:24:06,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:24:06,344 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:06,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 64 transitions, 922 flow. Second operand 9 states. [2020-10-16 03:24:06,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:06,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:06,345 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:06,576 INFO L129 PetriNetUnfolder]: 56/139 cut-off events. [2020-10-16 03:24:06,577 INFO L130 PetriNetUnfolder]: For 2179/2181 co-relation queries the response was YES. [2020-10-16 03:24:06,578 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 139 events. 56/139 cut-off events. For 2179/2181 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 517 event pairs, 0 based on Foata normal form. 3/142 useless extension candidates. Maximal degree in co-relation 1093. Up to 69 conditions per place. [2020-10-16 03:24:06,580 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 34 changer transitions 0/76 dead transitions. [2020-10-16 03:24:06,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 76 transitions, 1322 flow [2020-10-16 03:24:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:24:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:24:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 811 transitions. [2020-10-16 03:24:06,584 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 03:24:06,584 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 811 transitions. [2020-10-16 03:24:06,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 811 transitions. [2020-10-16 03:24:06,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:06,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 811 transitions. [2020-10-16 03:24:06,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:24:06,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:24:06,590 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:24:06,590 INFO L185 Difference]: Start difference. First operand has 93 places, 64 transitions, 922 flow. Second operand 12 states and 811 transitions. [2020-10-16 03:24:06,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 76 transitions, 1322 flow [2020-10-16 03:24:06,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 76 transitions, 1162 flow, removed 38 selfloop flow, removed 11 redundant places. [2020-10-16 03:24:06,605 INFO L241 Difference]: Finished difference. Result has 95 places, 67 transitions, 954 flow [2020-10-16 03:24:06,605 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=954, PETRI_PLACES=95, PETRI_TRANSITIONS=67} [2020-10-16 03:24:06,605 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 77 predicate places. [2020-10-16 03:24:06,606 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 954 flow [2020-10-16 03:24:06,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:24:06,606 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:06,606 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:06,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 03:24:06,820 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:06,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1246359991, now seen corresponding path program 12 times [2020-10-16 03:24:06,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:06,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947787936] [2020-10-16 03:24:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:06,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947787936] [2020-10-16 03:24:06,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165617568] [2020-10-16 03:24:06,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:06,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 03:24:06,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:06,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 03:24:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:06,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:06,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:06,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 03:24:06,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151982088] [2020-10-16 03:24:06,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 03:24:06,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:06,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 03:24:06,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 03:24:06,964 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:06,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 954 flow. Second operand 10 states. [2020-10-16 03:24:06,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:06,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:06,967 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:07,212 INFO L129 PetriNetUnfolder]: 59/146 cut-off events. [2020-10-16 03:24:07,213 INFO L130 PetriNetUnfolder]: For 1848/1850 co-relation queries the response was YES. [2020-10-16 03:24:07,214 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 146 events. 59/146 cut-off events. For 1848/1850 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 543 event pairs, 0 based on Foata normal form. 1/147 useless extension candidates. Maximal degree in co-relation 1089. Up to 73 conditions per place. [2020-10-16 03:24:07,216 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 19 selfloop transitions, 54 changer transitions 0/80 dead transitions. [2020-10-16 03:24:07,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 80 transitions, 1380 flow [2020-10-16 03:24:07,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:24:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:24:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 811 transitions. [2020-10-16 03:24:07,220 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 03:24:07,220 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 811 transitions. [2020-10-16 03:24:07,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 811 transitions. [2020-10-16 03:24:07,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:07,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 811 transitions. [2020-10-16 03:24:07,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:24:07,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:24:07,225 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:24:07,225 INFO L185 Difference]: Start difference. First operand has 95 places, 67 transitions, 954 flow. Second operand 12 states and 811 transitions. [2020-10-16 03:24:07,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 80 transitions, 1380 flow [2020-10-16 03:24:07,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 80 transitions, 1310 flow, removed 11 selfloop flow, removed 9 redundant places. [2020-10-16 03:24:07,240 INFO L241 Difference]: Finished difference. Result has 99 places, 70 transitions, 1090 flow [2020-10-16 03:24:07,241 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1090, PETRI_PLACES=99, PETRI_TRANSITIONS=70} [2020-10-16 03:24:07,241 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 81 predicate places. [2020-10-16 03:24:07,241 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 70 transitions, 1090 flow [2020-10-16 03:24:07,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 03:24:07,241 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:07,241 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:07,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:07,456 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1053734124, now seen corresponding path program 13 times [2020-10-16 03:24:07,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:07,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926180289] [2020-10-16 03:24:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:07,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926180289] [2020-10-16 03:24:07,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474593738] [2020-10-16 03:24:07,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:07,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 03:24:07,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:07,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:07,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 03:24:07,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527813130] [2020-10-16 03:24:07,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:24:07,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:07,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:24:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:24:07,619 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:07,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 70 transitions, 1090 flow. Second operand 9 states. [2020-10-16 03:24:07,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:07,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:07,620 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:07,786 INFO L129 PetriNetUnfolder]: 61/151 cut-off events. [2020-10-16 03:24:07,786 INFO L130 PetriNetUnfolder]: For 2363/2369 co-relation queries the response was YES. [2020-10-16 03:24:07,788 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 151 events. 61/151 cut-off events. For 2363/2369 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 571 event pairs, 0 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 1208. Up to 88 conditions per place. [2020-10-16 03:24:07,790 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 55 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2020-10-16 03:24:07,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 79 transitions, 1454 flow [2020-10-16 03:24:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 03:24:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-16 03:24:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 674 transitions. [2020-10-16 03:24:07,793 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 03:24:07,793 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 674 transitions. [2020-10-16 03:24:07,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 674 transitions. [2020-10-16 03:24:07,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:07,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 674 transitions. [2020-10-16 03:24:07,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-16 03:24:07,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-16 03:24:07,799 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-16 03:24:07,799 INFO L185 Difference]: Start difference. First operand has 99 places, 70 transitions, 1090 flow. Second operand 10 states and 674 transitions. [2020-10-16 03:24:07,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 79 transitions, 1454 flow [2020-10-16 03:24:07,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 79 transitions, 1330 flow, removed 21 selfloop flow, removed 9 redundant places. [2020-10-16 03:24:07,817 INFO L241 Difference]: Finished difference. Result has 101 places, 72 transitions, 1060 flow [2020-10-16 03:24:07,818 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1060, PETRI_PLACES=101, PETRI_TRANSITIONS=72} [2020-10-16 03:24:07,818 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 83 predicate places. [2020-10-16 03:24:07,819 INFO L481 AbstractCegarLoop]: Abstraction has has 101 places, 72 transitions, 1060 flow [2020-10-16 03:24:07,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:24:07,819 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:07,819 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:08,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 03:24:08,035 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:08,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1491024660, now seen corresponding path program 14 times [2020-10-16 03:24:08,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:08,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146409210] [2020-10-16 03:24:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:08,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146409210] [2020-10-16 03:24:08,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515012573] [2020-10-16 03:24:08,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:08,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:08,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:08,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 03:24:08,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:08,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:08,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:08,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 03:24:08,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020992779] [2020-10-16 03:24:08,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 03:24:08,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:08,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 03:24:08,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 03:24:08,178 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:08,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 72 transitions, 1060 flow. Second operand 10 states. [2020-10-16 03:24:08,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:08,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:08,178 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:08,460 INFO L129 PetriNetUnfolder]: 65/162 cut-off events. [2020-10-16 03:24:08,461 INFO L130 PetriNetUnfolder]: For 2893/2899 co-relation queries the response was YES. [2020-10-16 03:24:08,462 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1357 conditions, 162 events. 65/162 cut-off events. For 2893/2899 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 625 event pairs, 0 based on Foata normal form. 8/170 useless extension candidates. Maximal degree in co-relation 1309. Up to 83 conditions per place. [2020-10-16 03:24:08,465 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 46 changer transitions 0/88 dead transitions. [2020-10-16 03:24:08,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 88 transitions, 1610 flow [2020-10-16 03:24:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 03:24:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-16 03:24:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1014 transitions. [2020-10-16 03:24:08,468 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 03:24:08,468 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1014 transitions. [2020-10-16 03:24:08,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1014 transitions. [2020-10-16 03:24:08,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:08,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1014 transitions. [2020-10-16 03:24:08,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-16 03:24:08,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-16 03:24:08,473 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-16 03:24:08,474 INFO L185 Difference]: Start difference. First operand has 101 places, 72 transitions, 1060 flow. Second operand 15 states and 1014 transitions. [2020-10-16 03:24:08,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 88 transitions, 1610 flow [2020-10-16 03:24:08,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 88 transitions, 1526 flow, removed 27 selfloop flow, removed 7 redundant places. [2020-10-16 03:24:08,489 INFO L241 Difference]: Finished difference. Result has 111 places, 76 transitions, 1211 flow [2020-10-16 03:24:08,489 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1211, PETRI_PLACES=111, PETRI_TRANSITIONS=76} [2020-10-16 03:24:08,490 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 93 predicate places. [2020-10-16 03:24:08,490 INFO L481 AbstractCegarLoop]: Abstraction has has 111 places, 76 transitions, 1211 flow [2020-10-16 03:24:08,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 03:24:08,490 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:08,490 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:08,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 03:24:08,705 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1389554911, now seen corresponding path program 15 times [2020-10-16 03:24:08,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:08,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704843869] [2020-10-16 03:24:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:08,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704843869] [2020-10-16 03:24:08,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294492068] [2020-10-16 03:24:08,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:08,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 03:24:08,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:08,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:24:08,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:08,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:08,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 03:24:08,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147473844] [2020-10-16 03:24:08,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 03:24:08,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:08,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 03:24:08,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 03:24:08,865 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:08,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 76 transitions, 1211 flow. Second operand 10 states. [2020-10-16 03:24:08,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:08,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:08,865 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:09,049 INFO L129 PetriNetUnfolder]: 67/167 cut-off events. [2020-10-16 03:24:09,049 INFO L130 PetriNetUnfolder]: For 3566/3568 co-relation queries the response was YES. [2020-10-16 03:24:09,053 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1505 conditions, 167 events. 67/167 cut-off events. For 3566/3568 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 640 event pairs, 0 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 1454. Up to 87 conditions per place. [2020-10-16 03:24:09,055 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 50 selfloop transitions, 30 changer transitions 0/87 dead transitions. [2020-10-16 03:24:09,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 87 transitions, 1677 flow [2020-10-16 03:24:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:24:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:24:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 809 transitions. [2020-10-16 03:24:09,060 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741666666666667 [2020-10-16 03:24:09,060 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 809 transitions. [2020-10-16 03:24:09,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 809 transitions. [2020-10-16 03:24:09,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:09,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 809 transitions. [2020-10-16 03:24:09,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:24:09,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:24:09,064 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:24:09,064 INFO L185 Difference]: Start difference. First operand has 111 places, 76 transitions, 1211 flow. Second operand 12 states and 809 transitions. [2020-10-16 03:24:09,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 87 transitions, 1677 flow [2020-10-16 03:24:09,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 87 transitions, 1536 flow, removed 38 selfloop flow, removed 11 redundant places. [2020-10-16 03:24:09,081 INFO L241 Difference]: Finished difference. Result has 113 places, 78 transitions, 1210 flow [2020-10-16 03:24:09,082 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1210, PETRI_PLACES=113, PETRI_TRANSITIONS=78} [2020-10-16 03:24:09,082 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 95 predicate places. [2020-10-16 03:24:09,082 INFO L481 AbstractCegarLoop]: Abstraction has has 113 places, 78 transitions, 1210 flow [2020-10-16 03:24:09,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 03:24:09,082 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:09,082 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:09,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 03:24:09,283 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:09,284 INFO L82 PathProgramCache]: Analyzing trace with hash -470026489, now seen corresponding path program 16 times [2020-10-16 03:24:09,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:09,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792286646] [2020-10-16 03:24:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:09,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792286646] [2020-10-16 03:24:09,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207595408] [2020-10-16 03:24:09,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:09,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:09,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:09,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:24:09,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:09,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:09,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:09,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 03:24:09,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949575673] [2020-10-16 03:24:09,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:09,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:09,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:09,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:09,451 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:09,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 78 transitions, 1210 flow. Second operand 11 states. [2020-10-16 03:24:09,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:09,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:09,453 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:09,749 INFO L129 PetriNetUnfolder]: 71/179 cut-off events. [2020-10-16 03:24:09,749 INFO L130 PetriNetUnfolder]: For 4049/4051 co-relation queries the response was YES. [2020-10-16 03:24:09,751 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1621 conditions, 179 events. 71/179 cut-off events. For 4049/4051 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 714 event pairs, 0 based on Foata normal form. 4/183 useless extension candidates. Maximal degree in co-relation 1568. Up to 95 conditions per place. [2020-10-16 03:24:09,754 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 44 selfloop transitions, 40 changer transitions 0/91 dead transitions. [2020-10-16 03:24:09,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 91 transitions, 1722 flow [2020-10-16 03:24:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 03:24:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 03:24:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 877 transitions. [2020-10-16 03:24:09,757 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6746153846153846 [2020-10-16 03:24:09,757 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 877 transitions. [2020-10-16 03:24:09,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 877 transitions. [2020-10-16 03:24:09,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:09,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 877 transitions. [2020-10-16 03:24:09,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 03:24:09,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 03:24:09,764 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 03:24:09,764 INFO L185 Difference]: Start difference. First operand has 113 places, 78 transitions, 1210 flow. Second operand 13 states and 877 transitions. [2020-10-16 03:24:09,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 91 transitions, 1722 flow [2020-10-16 03:24:09,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 91 transitions, 1616 flow, removed 27 selfloop flow, removed 9 redundant places. [2020-10-16 03:24:09,793 INFO L241 Difference]: Finished difference. Result has 118 places, 82 transitions, 1306 flow [2020-10-16 03:24:09,794 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1306, PETRI_PLACES=118, PETRI_TRANSITIONS=82} [2020-10-16 03:24:09,794 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 100 predicate places. [2020-10-16 03:24:09,794 INFO L481 AbstractCegarLoop]: Abstraction has has 118 places, 82 transitions, 1306 flow [2020-10-16 03:24:09,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:09,794 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:09,794 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:10,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 03:24:10,009 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash 17563211, now seen corresponding path program 17 times [2020-10-16 03:24:10,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:10,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147963111] [2020-10-16 03:24:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:10,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147963111] [2020-10-16 03:24:10,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932910068] [2020-10-16 03:24:10,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:10,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 03:24:10,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:10,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:24:10,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:10,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:10,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:10,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 03:24:10,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646964666] [2020-10-16 03:24:10,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:10,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:10,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:10,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:10,208 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:10,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 82 transitions, 1306 flow. Second operand 11 states. [2020-10-16 03:24:10,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:10,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:10,209 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:10,526 INFO L129 PetriNetUnfolder]: 75/188 cut-off events. [2020-10-16 03:24:10,526 INFO L130 PetriNetUnfolder]: For 4627/4629 co-relation queries the response was YES. [2020-10-16 03:24:10,528 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 188 events. 75/188 cut-off events. For 4627/4629 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 747 event pairs, 0 based on Foata normal form. 4/192 useless extension candidates. Maximal degree in co-relation 1704. Up to 101 conditions per place. [2020-10-16 03:24:10,531 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 20 selfloop transitions, 72 changer transitions 0/99 dead transitions. [2020-10-16 03:24:10,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 99 transitions, 1986 flow [2020-10-16 03:24:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 03:24:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-16 03:24:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1149 transitions. [2020-10-16 03:24:10,534 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758823529411765 [2020-10-16 03:24:10,534 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1149 transitions. [2020-10-16 03:24:10,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1149 transitions. [2020-10-16 03:24:10,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:10,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1149 transitions. [2020-10-16 03:24:10,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-16 03:24:10,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-16 03:24:10,539 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-16 03:24:10,539 INFO L185 Difference]: Start difference. First operand has 118 places, 82 transitions, 1306 flow. Second operand 17 states and 1149 transitions. [2020-10-16 03:24:10,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 99 transitions, 1986 flow [2020-10-16 03:24:10,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 99 transitions, 1838 flow, removed 42 selfloop flow, removed 10 redundant places. [2020-10-16 03:24:10,561 INFO L241 Difference]: Finished difference. Result has 127 places, 86 transitions, 1484 flow [2020-10-16 03:24:10,561 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1484, PETRI_PLACES=127, PETRI_TRANSITIONS=86} [2020-10-16 03:24:10,562 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 109 predicate places. [2020-10-16 03:24:10,562 INFO L481 AbstractCegarLoop]: Abstraction has has 127 places, 86 transitions, 1484 flow [2020-10-16 03:24:10,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:10,562 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:10,562 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:10,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:10,777 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:10,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:10,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1022892103, now seen corresponding path program 18 times [2020-10-16 03:24:10,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:10,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656948194] [2020-10-16 03:24:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:10,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656948194] [2020-10-16 03:24:10,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563220218] [2020-10-16 03:24:10,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:10,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 03:24:10,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:24:10,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:10,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:10,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:10,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 03:24:10,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978360398] [2020-10-16 03:24:10,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:10,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:10,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:10,909 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:10,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 86 transitions, 1484 flow. Second operand 11 states. [2020-10-16 03:24:10,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:10,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:10,910 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:11,256 INFO L129 PetriNetUnfolder]: 78/195 cut-off events. [2020-10-16 03:24:11,257 INFO L130 PetriNetUnfolder]: For 5048/5050 co-relation queries the response was YES. [2020-10-16 03:24:11,260 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 195 events. 78/195 cut-off events. For 5048/5050 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 783 event pairs, 0 based on Foata normal form. 3/198 useless extension candidates. Maximal degree in co-relation 1849. Up to 105 conditions per place. [2020-10-16 03:24:11,265 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 41 selfloop transitions, 54 changer transitions 0/102 dead transitions. [2020-10-16 03:24:11,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 102 transitions, 2138 flow [2020-10-16 03:24:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:24:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:24:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1081 transitions. [2020-10-16 03:24:11,268 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675625 [2020-10-16 03:24:11,268 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1081 transitions. [2020-10-16 03:24:11,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1081 transitions. [2020-10-16 03:24:11,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:11,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1081 transitions. [2020-10-16 03:24:11,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:24:11,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:24:11,282 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:24:11,282 INFO L185 Difference]: Start difference. First operand has 127 places, 86 transitions, 1484 flow. Second operand 16 states and 1081 transitions. [2020-10-16 03:24:11,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 102 transitions, 2138 flow [2020-10-16 03:24:11,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 102 transitions, 1940 flow, removed 45 selfloop flow, removed 13 redundant places. [2020-10-16 03:24:11,318 INFO L241 Difference]: Finished difference. Result has 131 places, 89 transitions, 1520 flow [2020-10-16 03:24:11,318 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1520, PETRI_PLACES=131, PETRI_TRANSITIONS=89} [2020-10-16 03:24:11,319 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 113 predicate places. [2020-10-16 03:24:11,319 INFO L481 AbstractCegarLoop]: Abstraction has has 131 places, 89 transitions, 1520 flow [2020-10-16 03:24:11,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:11,319 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:11,320 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:11,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:11,535 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:11,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:11,535 INFO L82 PathProgramCache]: Analyzing trace with hash 544475848, now seen corresponding path program 19 times [2020-10-16 03:24:11,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:11,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331326122] [2020-10-16 03:24:11,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:11,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331326122] [2020-10-16 03:24:11,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411465434] [2020-10-16 03:24:11,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:11,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:24:11,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:11,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:11,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:11,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 03:24:11,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391086078] [2020-10-16 03:24:11,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:24:11,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:11,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:24:11,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:24:11,811 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:11,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 89 transitions, 1520 flow. Second operand 12 states. [2020-10-16 03:24:11,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:11,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:11,812 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:12,269 INFO L129 PetriNetUnfolder]: 81/202 cut-off events. [2020-10-16 03:24:12,269 INFO L130 PetriNetUnfolder]: For 5395/5397 co-relation queries the response was YES. [2020-10-16 03:24:12,272 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 202 events. 81/202 cut-off events. For 5395/5397 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 816 event pairs, 0 based on Foata normal form. 1/203 useless extension candidates. Maximal degree in co-relation 1933. Up to 109 conditions per place. [2020-10-16 03:24:12,275 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 23 selfloop transitions, 76 changer transitions 0/106 dead transitions. [2020-10-16 03:24:12,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 106 transitions, 2254 flow [2020-10-16 03:24:12,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:24:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:24:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1081 transitions. [2020-10-16 03:24:12,278 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675625 [2020-10-16 03:24:12,278 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1081 transitions. [2020-10-16 03:24:12,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1081 transitions. [2020-10-16 03:24:12,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:12,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1081 transitions. [2020-10-16 03:24:12,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:24:12,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:24:12,284 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:24:12,285 INFO L185 Difference]: Start difference. First operand has 131 places, 89 transitions, 1520 flow. Second operand 16 states and 1081 transitions. [2020-10-16 03:24:12,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 106 transitions, 2254 flow [2020-10-16 03:24:12,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 106 transitions, 2091 flow, removed 39 selfloop flow, removed 13 redundant places. [2020-10-16 03:24:12,321 INFO L241 Difference]: Finished difference. Result has 135 places, 92 transitions, 1647 flow [2020-10-16 03:24:12,322 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1647, PETRI_PLACES=135, PETRI_TRANSITIONS=92} [2020-10-16 03:24:12,322 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 117 predicate places. [2020-10-16 03:24:12,322 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 92 transitions, 1647 flow [2020-10-16 03:24:12,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:24:12,322 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:12,322 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:12,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:12,536 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash 973804627, now seen corresponding path program 20 times [2020-10-16 03:24:12,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:12,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430964562] [2020-10-16 03:24:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:12,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430964562] [2020-10-16 03:24:12,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164080861] [2020-10-16 03:24:12,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:12,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:12,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:12,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:24:12,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:12,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:12,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 03:24:12,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145271868] [2020-10-16 03:24:12,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:12,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:12,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:12,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:12,730 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:12,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 92 transitions, 1647 flow. Second operand 11 states. [2020-10-16 03:24:12,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:12,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:12,731 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:12,914 INFO L129 PetriNetUnfolder]: 83/208 cut-off events. [2020-10-16 03:24:12,914 INFO L130 PetriNetUnfolder]: For 5951/5953 co-relation queries the response was YES. [2020-10-16 03:24:12,916 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 208 events. 83/208 cut-off events. For 5951/5953 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 846 event pairs, 0 based on Foata normal form. 4/212 useless extension candidates. Maximal degree in co-relation 2033. Up to 124 conditions per place. [2020-10-16 03:24:12,920 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 77 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2020-10-16 03:24:12,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 103 transitions, 2207 flow [2020-10-16 03:24:12,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:24:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:24:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 808 transitions. [2020-10-16 03:24:12,922 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2020-10-16 03:24:12,922 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 808 transitions. [2020-10-16 03:24:12,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 808 transitions. [2020-10-16 03:24:12,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:12,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 808 transitions. [2020-10-16 03:24:12,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:24:12,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:24:12,926 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:24:12,926 INFO L185 Difference]: Start difference. First operand has 135 places, 92 transitions, 1647 flow. Second operand 12 states and 808 transitions. [2020-10-16 03:24:12,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 103 transitions, 2207 flow [2020-10-16 03:24:12,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 103 transitions, 2013 flow, removed 32 selfloop flow, removed 13 redundant places. [2020-10-16 03:24:12,957 INFO L241 Difference]: Finished difference. Result has 135 places, 94 transitions, 1569 flow [2020-10-16 03:24:12,957 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1569, PETRI_PLACES=135, PETRI_TRANSITIONS=94} [2020-10-16 03:24:12,957 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 117 predicate places. [2020-10-16 03:24:12,958 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 94 transitions, 1569 flow [2020-10-16 03:24:12,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:12,958 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:12,958 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:13,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 03:24:13,172 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:13,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:13,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1417527963, now seen corresponding path program 21 times [2020-10-16 03:24:13,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:13,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200108228] [2020-10-16 03:24:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:13,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200108228] [2020-10-16 03:24:13,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877376271] [2020-10-16 03:24:13,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:13,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 03:24:13,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:13,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:24:13,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:13,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:13,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 03:24:13,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194545575] [2020-10-16 03:24:13,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:13,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:13,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:13,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:13,316 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:13,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 94 transitions, 1569 flow. Second operand 11 states. [2020-10-16 03:24:13,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:13,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:13,317 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:13,567 INFO L129 PetriNetUnfolder]: 87/218 cut-off events. [2020-10-16 03:24:13,567 INFO L130 PetriNetUnfolder]: For 7106/7108 co-relation queries the response was YES. [2020-10-16 03:24:13,569 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2217 conditions, 218 events. 87/218 cut-off events. For 7106/7108 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 891 event pairs, 0 based on Foata normal form. 4/222 useless extension candidates. Maximal degree in co-relation 2154. Up to 121 conditions per place. [2020-10-16 03:24:13,573 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 66 selfloop transitions, 37 changer transitions 0/110 dead transitions. [2020-10-16 03:24:13,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 110 transitions, 2277 flow [2020-10-16 03:24:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:24:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:24:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1079 transitions. [2020-10-16 03:24:13,580 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674375 [2020-10-16 03:24:13,580 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1079 transitions. [2020-10-16 03:24:13,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1079 transitions. [2020-10-16 03:24:13,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:13,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1079 transitions. [2020-10-16 03:24:13,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:24:13,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:24:13,586 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:24:13,586 INFO L185 Difference]: Start difference. First operand has 135 places, 94 transitions, 1569 flow. Second operand 16 states and 1079 transitions. [2020-10-16 03:24:13,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 110 transitions, 2277 flow [2020-10-16 03:24:13,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 110 transitions, 2171 flow, removed 36 selfloop flow, removed 9 redundant places. [2020-10-16 03:24:13,630 INFO L241 Difference]: Finished difference. Result has 146 places, 99 transitions, 1699 flow [2020-10-16 03:24:13,631 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1699, PETRI_PLACES=146, PETRI_TRANSITIONS=99} [2020-10-16 03:24:13,631 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 128 predicate places. [2020-10-16 03:24:13,631 INFO L481 AbstractCegarLoop]: Abstraction has has 146 places, 99 transitions, 1699 flow [2020-10-16 03:24:13,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:13,632 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:13,632 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:13,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 03:24:13,846 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:13,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:13,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1644884649, now seen corresponding path program 22 times [2020-10-16 03:24:13,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:13,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251994772] [2020-10-16 03:24:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:13,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251994772] [2020-10-16 03:24:13,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142848091] [2020-10-16 03:24:13,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:13,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:13,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:24:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:13,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:13,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 03:24:13,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952524440] [2020-10-16 03:24:13,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:13,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:13,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:13,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:13,995 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:13,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 99 transitions, 1699 flow. Second operand 11 states. [2020-10-16 03:24:13,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:13,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:13,996 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:14,353 INFO L129 PetriNetUnfolder]: 96/239 cut-off events. [2020-10-16 03:24:14,353 INFO L130 PetriNetUnfolder]: For 8833/8835 co-relation queries the response was YES. [2020-10-16 03:24:14,355 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2578 conditions, 239 events. 96/239 cut-off events. For 8833/8835 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 958 event pairs, 0 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 2510. Up to 135 conditions per place. [2020-10-16 03:24:14,359 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 38 selfloop transitions, 76 changer transitions 0/121 dead transitions. [2020-10-16 03:24:14,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 121 transitions, 2717 flow [2020-10-16 03:24:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:24:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:24:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1352 transitions. [2020-10-16 03:24:14,372 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 03:24:14,372 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1352 transitions. [2020-10-16 03:24:14,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1352 transitions. [2020-10-16 03:24:14,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:14,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1352 transitions. [2020-10-16 03:24:14,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:24:14,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:24:14,382 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:24:14,382 INFO L185 Difference]: Start difference. First operand has 146 places, 99 transitions, 1699 flow. Second operand 20 states and 1352 transitions. [2020-10-16 03:24:14,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 121 transitions, 2717 flow [2020-10-16 03:24:14,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 121 transitions, 2559 flow, removed 52 selfloop flow, removed 10 redundant places. [2020-10-16 03:24:14,417 INFO L241 Difference]: Finished difference. Result has 159 places, 105 transitions, 1985 flow [2020-10-16 03:24:14,418 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1985, PETRI_PLACES=159, PETRI_TRANSITIONS=105} [2020-10-16 03:24:14,418 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 141 predicate places. [2020-10-16 03:24:14,418 INFO L481 AbstractCegarLoop]: Abstraction has has 159 places, 105 transitions, 1985 flow [2020-10-16 03:24:14,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:14,418 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:14,418 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:14,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 03:24:14,632 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:14,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1644901389, now seen corresponding path program 23 times [2020-10-16 03:24:14,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:14,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893093777] [2020-10-16 03:24:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893093777] [2020-10-16 03:24:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707781508] [2020-10-16 03:24:14,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:14,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 03:24:14,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:14,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:24:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:14,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:14,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:14,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 03:24:14,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086771357] [2020-10-16 03:24:14,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:24:14,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:14,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:24:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:24:14,803 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:14,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 105 transitions, 1985 flow. Second operand 12 states. [2020-10-16 03:24:14,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:14,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:14,804 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:15,200 INFO L129 PetriNetUnfolder]: 93/234 cut-off events. [2020-10-16 03:24:15,200 INFO L130 PetriNetUnfolder]: For 9769/9775 co-relation queries the response was YES. [2020-10-16 03:24:15,203 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2636 conditions, 234 events. 93/234 cut-off events. For 9769/9775 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 971 event pairs, 0 based on Foata normal form. 8/242 useless extension candidates. Maximal degree in co-relation 2564. Up to 131 conditions per place. [2020-10-16 03:24:15,206 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 38 selfloop transitions, 76 changer transitions 0/121 dead transitions. [2020-10-16 03:24:15,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 121 transitions, 2843 flow [2020-10-16 03:24:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 03:24:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 03:24:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1284 transitions. [2020-10-16 03:24:15,209 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757894736842105 [2020-10-16 03:24:15,209 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1284 transitions. [2020-10-16 03:24:15,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1284 transitions. [2020-10-16 03:24:15,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:15,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1284 transitions. [2020-10-16 03:24:15,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 03:24:15,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 03:24:15,214 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 03:24:15,214 INFO L185 Difference]: Start difference. First operand has 159 places, 105 transitions, 1985 flow. Second operand 19 states and 1284 transitions. [2020-10-16 03:24:15,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 121 transitions, 2843 flow [2020-10-16 03:24:15,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 121 transitions, 2565 flow, removed 80 selfloop flow, removed 17 redundant places. [2020-10-16 03:24:15,256 INFO L241 Difference]: Finished difference. Result has 162 places, 106 transitions, 1941 flow [2020-10-16 03:24:15,257 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1941, PETRI_PLACES=162, PETRI_TRANSITIONS=106} [2020-10-16 03:24:15,257 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 144 predicate places. [2020-10-16 03:24:15,257 INFO L481 AbstractCegarLoop]: Abstraction has has 162 places, 106 transitions, 1941 flow [2020-10-16 03:24:15,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:24:15,257 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:15,257 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:15,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 03:24:15,472 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:15,472 INFO L82 PathProgramCache]: Analyzing trace with hash 372575520, now seen corresponding path program 24 times [2020-10-16 03:24:15,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:15,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880418823] [2020-10-16 03:24:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:15,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880418823] [2020-10-16 03:24:15,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636624805] [2020-10-16 03:24:15,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:15,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 03:24:15,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:24:15,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:15,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:15,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 03:24:15,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509717114] [2020-10-16 03:24:15,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:24:15,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:15,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:24:15,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:24:15,653 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:15,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 106 transitions, 1941 flow. Second operand 12 states. [2020-10-16 03:24:15,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:15,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:15,654 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:15,875 INFO L129 PetriNetUnfolder]: 95/240 cut-off events. [2020-10-16 03:24:15,875 INFO L130 PetriNetUnfolder]: For 10532/10534 co-relation queries the response was YES. [2020-10-16 03:24:15,878 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 240 events. 95/240 cut-off events. For 10532/10534 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1000 event pairs, 0 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 2633. Up to 133 conditions per place. [2020-10-16 03:24:15,881 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 78 selfloop transitions, 34 changer transitions 0/119 dead transitions. [2020-10-16 03:24:15,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 119 transitions, 2681 flow [2020-10-16 03:24:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 03:24:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-16 03:24:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 943 transitions. [2020-10-16 03:24:15,884 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6735714285714286 [2020-10-16 03:24:15,884 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 943 transitions. [2020-10-16 03:24:15,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 943 transitions. [2020-10-16 03:24:15,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:15,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 943 transitions. [2020-10-16 03:24:15,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-16 03:24:15,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-16 03:24:15,887 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-16 03:24:15,887 INFO L185 Difference]: Start difference. First operand has 162 places, 106 transitions, 1941 flow. Second operand 14 states and 943 transitions. [2020-10-16 03:24:15,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 119 transitions, 2681 flow [2020-10-16 03:24:15,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 119 transitions, 2463 flow, removed 41 selfloop flow, removed 17 redundant places. [2020-10-16 03:24:15,927 INFO L241 Difference]: Finished difference. Result has 160 places, 108 transitions, 1919 flow [2020-10-16 03:24:15,928 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1919, PETRI_PLACES=160, PETRI_TRANSITIONS=108} [2020-10-16 03:24:15,928 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 142 predicate places. [2020-10-16 03:24:15,928 INFO L481 AbstractCegarLoop]: Abstraction has has 160 places, 108 transitions, 1919 flow [2020-10-16 03:24:15,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:24:15,928 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:15,928 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:16,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 03:24:16,144 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:16,144 INFO L82 PathProgramCache]: Analyzing trace with hash -723873914, now seen corresponding path program 25 times [2020-10-16 03:24:16,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:16,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754301390] [2020-10-16 03:24:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:16,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754301390] [2020-10-16 03:24:16,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778104710] [2020-10-16 03:24:16,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:16,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:24:16,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:16,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:16,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:16,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:24:16,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867324551] [2020-10-16 03:24:16,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:24:16,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:16,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:24:16,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:24:16,328 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:16,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 108 transitions, 1919 flow. Second operand 13 states. [2020-10-16 03:24:16,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:16,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:16,330 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:16,648 INFO L129 PetriNetUnfolder]: 99/251 cut-off events. [2020-10-16 03:24:16,648 INFO L130 PetriNetUnfolder]: For 10493/10499 co-relation queries the response was YES. [2020-10-16 03:24:16,651 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2772 conditions, 251 events. 99/251 cut-off events. For 10493/10499 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1068 event pairs, 0 based on Foata normal form. 8/259 useless extension candidates. Maximal degree in co-relation 2698. Up to 141 conditions per place. [2020-10-16 03:24:16,655 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 68 selfloop transitions, 48 changer transitions 0/123 dead transitions. [2020-10-16 03:24:16,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 123 transitions, 2688 flow [2020-10-16 03:24:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 03:24:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-16 03:24:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1011 transitions. [2020-10-16 03:24:16,657 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 03:24:16,657 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1011 transitions. [2020-10-16 03:24:16,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1011 transitions. [2020-10-16 03:24:16,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:16,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1011 transitions. [2020-10-16 03:24:16,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-16 03:24:16,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-16 03:24:16,661 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-16 03:24:16,662 INFO L185 Difference]: Start difference. First operand has 160 places, 108 transitions, 1919 flow. Second operand 15 states and 1011 transitions. [2020-10-16 03:24:16,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 123 transitions, 2688 flow [2020-10-16 03:24:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 123 transitions, 2556 flow, removed 36 selfloop flow, removed 11 redundant places. [2020-10-16 03:24:16,711 INFO L241 Difference]: Finished difference. Result has 165 places, 112 transitions, 2032 flow [2020-10-16 03:24:16,711 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2032, PETRI_PLACES=165, PETRI_TRANSITIONS=112} [2020-10-16 03:24:16,712 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 147 predicate places. [2020-10-16 03:24:16,712 INFO L481 AbstractCegarLoop]: Abstraction has has 165 places, 112 transitions, 2032 flow [2020-10-16 03:24:16,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:24:16,712 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:16,712 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:16,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:16,927 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:16,928 INFO L82 PathProgramCache]: Analyzing trace with hash -301607478, now seen corresponding path program 26 times [2020-10-16 03:24:16,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:16,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184778125] [2020-10-16 03:24:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:17,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184778125] [2020-10-16 03:24:17,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018338918] [2020-10-16 03:24:17,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:17,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:17,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:24:17,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:17,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:17,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:17,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:24:17,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488107000] [2020-10-16 03:24:17,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:24:17,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:17,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:24:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:24:17,136 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:17,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 112 transitions, 2032 flow. Second operand 13 states. [2020-10-16 03:24:17,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:17,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:17,138 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:17,570 INFO L129 PetriNetUnfolder]: 103/263 cut-off events. [2020-10-16 03:24:17,571 INFO L130 PetriNetUnfolder]: For 11578/11584 co-relation queries the response was YES. [2020-10-16 03:24:17,573 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2967 conditions, 263 events. 103/263 cut-off events. For 11578/11584 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1136 event pairs, 0 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 2891. Up to 149 conditions per place. [2020-10-16 03:24:17,577 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 36 selfloop transitions, 88 changer transitions 0/131 dead transitions. [2020-10-16 03:24:17,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 131 transitions, 2989 flow [2020-10-16 03:24:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 03:24:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 03:24:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1283 transitions. [2020-10-16 03:24:17,578 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752631578947368 [2020-10-16 03:24:17,579 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1283 transitions. [2020-10-16 03:24:17,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1283 transitions. [2020-10-16 03:24:17,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:17,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1283 transitions. [2020-10-16 03:24:17,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 03:24:17,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 03:24:17,583 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 03:24:17,583 INFO L185 Difference]: Start difference. First operand has 165 places, 112 transitions, 2032 flow. Second operand 19 states and 1283 transitions. [2020-10-16 03:24:17,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 131 transitions, 2989 flow [2020-10-16 03:24:17,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 131 transitions, 2811 flow, removed 49 selfloop flow, removed 12 redundant places. [2020-10-16 03:24:17,628 INFO L241 Difference]: Finished difference. Result has 173 places, 116 transitions, 2211 flow [2020-10-16 03:24:17,628 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2211, PETRI_PLACES=173, PETRI_TRANSITIONS=116} [2020-10-16 03:24:17,628 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 155 predicate places. [2020-10-16 03:24:17,628 INFO L481 AbstractCegarLoop]: Abstraction has has 173 places, 116 transitions, 2211 flow [2020-10-16 03:24:17,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:24:17,628 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:17,628 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:17,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 03:24:17,829 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:17,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:17,830 INFO L82 PathProgramCache]: Analyzing trace with hash -301117368, now seen corresponding path program 27 times [2020-10-16 03:24:17,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:17,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871663609] [2020-10-16 03:24:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:17,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871663609] [2020-10-16 03:24:17,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349742469] [2020-10-16 03:24:17,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:17,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 03:24:17,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:17,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:24:17,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:18,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:18,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 03:24:18,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037683045] [2020-10-16 03:24:18,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:24:18,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:18,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:24:18,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:24:18,016 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:18,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 116 transitions, 2211 flow. Second operand 12 states. [2020-10-16 03:24:18,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:18,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:18,017 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:18,365 INFO L129 PetriNetUnfolder]: 112/285 cut-off events. [2020-10-16 03:24:18,365 INFO L130 PetriNetUnfolder]: For 12865/12871 co-relation queries the response was YES. [2020-10-16 03:24:18,368 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3343 conditions, 285 events. 112/285 cut-off events. For 12865/12871 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1236 event pairs, 0 based on Foata normal form. 5/290 useless extension candidates. Maximal degree in co-relation 3265. Up to 163 conditions per place. [2020-10-16 03:24:18,373 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 29 selfloop transitions, 104 changer transitions 0/140 dead transitions. [2020-10-16 03:24:18,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 140 transitions, 3429 flow [2020-10-16 03:24:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:24:18,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:24:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1352 transitions. [2020-10-16 03:24:18,375 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 03:24:18,375 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1352 transitions. [2020-10-16 03:24:18,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1352 transitions. [2020-10-16 03:24:18,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:18,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1352 transitions. [2020-10-16 03:24:18,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:24:18,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:24:18,380 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:24:18,380 INFO L185 Difference]: Start difference. First operand has 173 places, 116 transitions, 2211 flow. Second operand 20 states and 1352 transitions. [2020-10-16 03:24:18,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 140 transitions, 3429 flow [2020-10-16 03:24:18,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 140 transitions, 3165 flow, removed 58 selfloop flow, removed 16 redundant places. [2020-10-16 03:24:18,426 INFO L241 Difference]: Finished difference. Result has 180 places, 122 transitions, 2485 flow [2020-10-16 03:24:18,427 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2485, PETRI_PLACES=180, PETRI_TRANSITIONS=122} [2020-10-16 03:24:18,427 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 162 predicate places. [2020-10-16 03:24:18,427 INFO L481 AbstractCegarLoop]: Abstraction has has 180 places, 122 transitions, 2485 flow [2020-10-16 03:24:18,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:24:18,427 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:18,428 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:18,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 03:24:18,641 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2103231458, now seen corresponding path program 28 times [2020-10-16 03:24:18,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:18,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585274582] [2020-10-16 03:24:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:18,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585274582] [2020-10-16 03:24:18,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885715911] [2020-10-16 03:24:18,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:18,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:18,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:24:18,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:18,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:18,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:18,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:24:18,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371301520] [2020-10-16 03:24:18,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:24:18,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:24:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:24:18,816 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:18,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 122 transitions, 2485 flow. Second operand 13 states. [2020-10-16 03:24:18,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:18,816 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:18,817 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:19,284 INFO L129 PetriNetUnfolder]: 109/279 cut-off events. [2020-10-16 03:24:19,284 INFO L130 PetriNetUnfolder]: For 14260/14262 co-relation queries the response was YES. [2020-10-16 03:24:19,287 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3394 conditions, 279 events. 109/279 cut-off events. For 14260/14262 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1241 event pairs, 0 based on Foata normal form. 4/283 useless extension candidates. Maximal degree in co-relation 3312. Up to 159 conditions per place. [2020-10-16 03:24:19,290 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 27 selfloop transitions, 106 changer transitions 0/140 dead transitions. [2020-10-16 03:24:19,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 140 transitions, 3525 flow [2020-10-16 03:24:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 03:24:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 03:24:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1419 transitions. [2020-10-16 03:24:19,293 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757142857142857 [2020-10-16 03:24:19,293 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1419 transitions. [2020-10-16 03:24:19,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1419 transitions. [2020-10-16 03:24:19,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:19,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1419 transitions. [2020-10-16 03:24:19,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 03:24:19,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 03:24:19,297 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 03:24:19,297 INFO L185 Difference]: Start difference. First operand has 180 places, 122 transitions, 2485 flow. Second operand 21 states and 1419 transitions. [2020-10-16 03:24:19,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 140 transitions, 3525 flow [2020-10-16 03:24:19,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 140 transitions, 3197 flow, removed 85 selfloop flow, removed 15 redundant places. [2020-10-16 03:24:19,339 INFO L241 Difference]: Finished difference. Result has 187 places, 123 transitions, 2463 flow [2020-10-16 03:24:19,339 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2463, PETRI_PLACES=187, PETRI_TRANSITIONS=123} [2020-10-16 03:24:19,339 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 169 predicate places. [2020-10-16 03:24:19,340 INFO L481 AbstractCegarLoop]: Abstraction has has 187 places, 123 transitions, 2463 flow [2020-10-16 03:24:19,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:24:19,340 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:19,340 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:19,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:19,547 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:19,548 INFO L82 PathProgramCache]: Analyzing trace with hash -547648186, now seen corresponding path program 29 times [2020-10-16 03:24:19,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:19,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108017571] [2020-10-16 03:24:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:19,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108017571] [2020-10-16 03:24:19,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333021061] [2020-10-16 03:24:19,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:19,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 03:24:19,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:19,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:24:19,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:19,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:19,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:19,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:24:19,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192370091] [2020-10-16 03:24:19,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:24:19,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:19,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:24:19,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:24:19,705 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:19,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 123 transitions, 2463 flow. Second operand 13 states. [2020-10-16 03:24:19,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:19,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:19,706 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:20,152 INFO L129 PetriNetUnfolder]: 112/284 cut-off events. [2020-10-16 03:24:20,152 INFO L130 PetriNetUnfolder]: For 15335/15337 co-relation queries the response was YES. [2020-10-16 03:24:20,155 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3505 conditions, 284 events. 112/284 cut-off events. For 15335/15337 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1256 event pairs, 0 based on Foata normal form. 3/287 useless extension candidates. Maximal degree in co-relation 3421. Up to 161 conditions per place. [2020-10-16 03:24:20,163 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 49 selfloop transitions, 86 changer transitions 0/142 dead transitions. [2020-10-16 03:24:20,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 142 transitions, 3559 flow [2020-10-16 03:24:20,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:24:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:24:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2020-10-16 03:24:20,165 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 03:24:20,165 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2020-10-16 03:24:20,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2020-10-16 03:24:20,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:20,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2020-10-16 03:24:20,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:24:20,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:24:20,171 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:24:20,171 INFO L185 Difference]: Start difference. First operand has 187 places, 123 transitions, 2463 flow. Second operand 20 states and 1351 transitions. [2020-10-16 03:24:20,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 142 transitions, 3559 flow [2020-10-16 03:24:20,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 142 transitions, 3275 flow, removed 50 selfloop flow, removed 18 redundant places. [2020-10-16 03:24:20,233 INFO L241 Difference]: Finished difference. Result has 190 places, 126 transitions, 2559 flow [2020-10-16 03:24:20,233 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2235, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2559, PETRI_PLACES=190, PETRI_TRANSITIONS=126} [2020-10-16 03:24:20,233 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 172 predicate places. [2020-10-16 03:24:20,233 INFO L481 AbstractCegarLoop]: Abstraction has has 190 places, 126 transitions, 2559 flow [2020-10-16 03:24:20,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:24:20,234 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:20,234 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:20,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:20,449 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:20,449 INFO L82 PathProgramCache]: Analyzing trace with hash -744168569, now seen corresponding path program 30 times [2020-10-16 03:24:20,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:20,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151690747] [2020-10-16 03:24:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:20,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151690747] [2020-10-16 03:24:20,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105403563] [2020-10-16 03:24:20,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:20,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 03:24:20,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:20,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:24:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:20,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:20,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:20,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 03:24:20,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293866313] [2020-10-16 03:24:20,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:24:20,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:20,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:24:20,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:24:20,637 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:20,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 126 transitions, 2559 flow. Second operand 14 states. [2020-10-16 03:24:20,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:20,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:20,638 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:21,165 INFO L129 PetriNetUnfolder]: 115/291 cut-off events. [2020-10-16 03:24:21,165 INFO L130 PetriNetUnfolder]: For 14738/14740 co-relation queries the response was YES. [2020-10-16 03:24:21,167 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3553 conditions, 291 events. 115/291 cut-off events. For 14738/14740 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1295 event pairs, 0 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 3467. Up to 165 conditions per place. [2020-10-16 03:24:21,172 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 30 selfloop transitions, 110 changer transitions 0/147 dead transitions. [2020-10-16 03:24:21,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 147 transitions, 3731 flow [2020-10-16 03:24:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:24:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:24:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2020-10-16 03:24:21,174 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 03:24:21,174 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2020-10-16 03:24:21,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2020-10-16 03:24:21,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:21,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2020-10-16 03:24:21,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:24:21,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:24:21,178 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:24:21,178 INFO L185 Difference]: Start difference. First operand has 190 places, 126 transitions, 2559 flow. Second operand 20 states and 1351 transitions. [2020-10-16 03:24:21,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 147 transitions, 3731 flow [2020-10-16 03:24:21,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 147 transitions, 3515 flow, removed 37 selfloop flow, removed 17 redundant places. [2020-10-16 03:24:21,232 INFO L241 Difference]: Finished difference. Result has 194 places, 129 transitions, 2727 flow [2020-10-16 03:24:21,233 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2727, PETRI_PLACES=194, PETRI_TRANSITIONS=129} [2020-10-16 03:24:21,233 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 176 predicate places. [2020-10-16 03:24:21,233 INFO L481 AbstractCegarLoop]: Abstraction has has 194 places, 129 transitions, 2727 flow [2020-10-16 03:24:21,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:24:21,233 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:21,233 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:21,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 03:24:21,434 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:21,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:21,435 INFO L82 PathProgramCache]: Analyzing trace with hash -476608046, now seen corresponding path program 31 times [2020-10-16 03:24:21,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:21,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080310023] [2020-10-16 03:24:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:21,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080310023] [2020-10-16 03:24:21,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254599187] [2020-10-16 03:24:21,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:21,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:24:21,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:21,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:21,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 03:24:21,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871193465] [2020-10-16 03:24:21,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:24:21,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:21,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:24:21,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:24:21,596 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:21,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 129 transitions, 2727 flow. Second operand 13 states. [2020-10-16 03:24:21,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:21,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:21,597 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:21,832 INFO L129 PetriNetUnfolder]: 117/298 cut-off events. [2020-10-16 03:24:21,832 INFO L130 PetriNetUnfolder]: For 16631/16633 co-relation queries the response was YES. [2020-10-16 03:24:21,835 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3744 conditions, 298 events. 117/298 cut-off events. For 16631/16633 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1329 event pairs, 0 based on Foata normal form. 4/302 useless extension candidates. Maximal degree in co-relation 3656. Up to 184 conditions per place. [2020-10-16 03:24:21,842 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 114 selfloop transitions, 21 changer transitions 0/142 dead transitions. [2020-10-16 03:24:21,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 142 transitions, 3587 flow [2020-10-16 03:24:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 03:24:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-16 03:24:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 942 transitions. [2020-10-16 03:24:21,843 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6728571428571428 [2020-10-16 03:24:21,843 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 942 transitions. [2020-10-16 03:24:21,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 942 transitions. [2020-10-16 03:24:21,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:21,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 942 transitions. [2020-10-16 03:24:21,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-16 03:24:21,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-16 03:24:21,846 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-16 03:24:21,846 INFO L185 Difference]: Start difference. First operand has 194 places, 129 transitions, 2727 flow. Second operand 14 states and 942 transitions. [2020-10-16 03:24:21,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 142 transitions, 3587 flow [2020-10-16 03:24:21,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 142 transitions, 3315 flow, removed 42 selfloop flow, removed 17 redundant places. [2020-10-16 03:24:21,903 INFO L241 Difference]: Finished difference. Result has 192 places, 131 transitions, 2599 flow [2020-10-16 03:24:21,904 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2599, PETRI_PLACES=192, PETRI_TRANSITIONS=131} [2020-10-16 03:24:21,904 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 174 predicate places. [2020-10-16 03:24:21,904 INFO L481 AbstractCegarLoop]: Abstraction has has 192 places, 131 transitions, 2599 flow [2020-10-16 03:24:21,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:24:21,904 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:21,904 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:22,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:22,113 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash -219980600, now seen corresponding path program 32 times [2020-10-16 03:24:22,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:22,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376422577] [2020-10-16 03:24:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:22,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376422577] [2020-10-16 03:24:22,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352650778] [2020-10-16 03:24:22,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:22,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:22,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:22,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:24:22,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:22,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:22,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:22,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 03:24:22,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327607980] [2020-10-16 03:24:22,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:24:22,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:22,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:24:22,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:24:22,308 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:22,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 131 transitions, 2599 flow. Second operand 14 states. [2020-10-16 03:24:22,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:22,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:22,309 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:22,663 INFO L129 PetriNetUnfolder]: 129/332 cut-off events. [2020-10-16 03:24:22,664 INFO L130 PetriNetUnfolder]: For 20515/20521 co-relation queries the response was YES. [2020-10-16 03:24:22,667 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4209 conditions, 332 events. 129/332 cut-off events. For 20515/20521 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1561 event pairs, 0 based on Foata normal form. 8/340 useless extension candidates. Maximal degree in co-relation 4119. Up to 191 conditions per place. [2020-10-16 03:24:22,672 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 95 selfloop transitions, 54 changer transitions 0/156 dead transitions. [2020-10-16 03:24:22,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 156 transitions, 3849 flow [2020-10-16 03:24:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 03:24:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-16 03:24:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1146 transitions. [2020-10-16 03:24:22,675 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741176470588235 [2020-10-16 03:24:22,675 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1146 transitions. [2020-10-16 03:24:22,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1146 transitions. [2020-10-16 03:24:22,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:22,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1146 transitions. [2020-10-16 03:24:22,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-16 03:24:22,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-16 03:24:22,679 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-16 03:24:22,679 INFO L185 Difference]: Start difference. First operand has 192 places, 131 transitions, 2599 flow. Second operand 17 states and 1146 transitions. [2020-10-16 03:24:22,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 156 transitions, 3849 flow [2020-10-16 03:24:22,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 156 transitions, 3721 flow, removed 45 selfloop flow, removed 11 redundant places. [2020-10-16 03:24:22,744 INFO L241 Difference]: Finished difference. Result has 203 places, 143 transitions, 3011 flow [2020-10-16 03:24:22,745 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3011, PETRI_PLACES=203, PETRI_TRANSITIONS=143} [2020-10-16 03:24:22,745 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 185 predicate places. [2020-10-16 03:24:22,745 INFO L481 AbstractCegarLoop]: Abstraction has has 203 places, 143 transitions, 3011 flow [2020-10-16 03:24:22,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:24:22,745 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:22,745 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:22,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 03:24:22,947 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:22,948 INFO L82 PathProgramCache]: Analyzing trace with hash 202792686, now seen corresponding path program 33 times [2020-10-16 03:24:22,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:22,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54008328] [2020-10-16 03:24:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:23,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54008328] [2020-10-16 03:24:23,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907507828] [2020-10-16 03:24:23,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:23,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 03:24:23,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:23,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:24:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:23,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:23,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:23,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 03:24:23,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355198944] [2020-10-16 03:24:23,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:24:23,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:24:23,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:24:23,123 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:23,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 143 transitions, 3011 flow. Second operand 14 states. [2020-10-16 03:24:23,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:23,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:23,124 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:23,671 INFO L129 PetriNetUnfolder]: 133/342 cut-off events. [2020-10-16 03:24:23,671 INFO L130 PetriNetUnfolder]: For 22559/22565 co-relation queries the response was YES. [2020-10-16 03:24:23,675 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4482 conditions, 342 events. 133/342 cut-off events. For 22559/22565 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1607 event pairs, 0 based on Foata normal form. 8/350 useless extension candidates. Maximal degree in co-relation 4386. Up to 197 conditions per place. [2020-10-16 03:24:23,680 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 47 selfloop transitions, 112 changer transitions 0/166 dead transitions. [2020-10-16 03:24:23,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 166 transitions, 4419 flow [2020-10-16 03:24:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 03:24:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 03:24:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1554 transitions. [2020-10-16 03:24:23,683 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6756521739130434 [2020-10-16 03:24:23,683 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1554 transitions. [2020-10-16 03:24:23,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1554 transitions. [2020-10-16 03:24:23,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:23,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1554 transitions. [2020-10-16 03:24:23,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 03:24:23,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 03:24:23,688 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 03:24:23,688 INFO L185 Difference]: Start difference. First operand has 203 places, 143 transitions, 3011 flow. Second operand 23 states and 1554 transitions. [2020-10-16 03:24:23,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 166 transitions, 4419 flow [2020-10-16 03:24:23,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 166 transitions, 4237 flow, removed 64 selfloop flow, removed 10 redundant places. [2020-10-16 03:24:23,760 INFO L241 Difference]: Finished difference. Result has 218 places, 147 transitions, 3320 flow [2020-10-16 03:24:23,761 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3320, PETRI_PLACES=218, PETRI_TRANSITIONS=147} [2020-10-16 03:24:23,761 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 200 predicate places. [2020-10-16 03:24:23,761 INFO L481 AbstractCegarLoop]: Abstraction has has 218 places, 147 transitions, 3320 flow [2020-10-16 03:24:23,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:24:23,761 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:23,761 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:23,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:23,975 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:23,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1115003167, now seen corresponding path program 34 times [2020-10-16 03:24:23,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:23,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107408970] [2020-10-16 03:24:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:24,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107408970] [2020-10-16 03:24:24,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884738389] [2020-10-16 03:24:24,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:24,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:24,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:24,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:24:24,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:24,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:24,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 03:24:24,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385620207] [2020-10-16 03:24:24,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:24:24,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:24:24,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:24:24,163 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:24,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 147 transitions, 3320 flow. Second operand 14 states. [2020-10-16 03:24:24,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:24,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:24,163 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:24,453 INFO L129 PetriNetUnfolder]: 135/349 cut-off events. [2020-10-16 03:24:24,454 INFO L130 PetriNetUnfolder]: For 23865/23871 co-relation queries the response was YES. [2020-10-16 03:24:24,457 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4715 conditions, 349 events. 135/349 cut-off events. For 23865/23871 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1647 event pairs, 0 based on Foata normal form. 5/354 useless extension candidates. Maximal degree in co-relation 4616. Up to 201 conditions per place. [2020-10-16 03:24:24,461 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 111 selfloop transitions, 44 changer transitions 0/162 dead transitions. [2020-10-16 03:24:24,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 162 transitions, 4362 flow [2020-10-16 03:24:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:24:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:24:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1077 transitions. [2020-10-16 03:24:24,464 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.673125 [2020-10-16 03:24:24,465 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1077 transitions. [2020-10-16 03:24:24,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1077 transitions. [2020-10-16 03:24:24,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:24,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1077 transitions. [2020-10-16 03:24:24,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:24:24,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:24:24,468 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:24:24,468 INFO L185 Difference]: Start difference. First operand has 218 places, 147 transitions, 3320 flow. Second operand 16 states and 1077 transitions. [2020-10-16 03:24:24,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 162 transitions, 4362 flow [2020-10-16 03:24:24,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 162 transitions, 4045 flow, removed 71 selfloop flow, removed 18 redundant places. [2020-10-16 03:24:24,563 INFO L241 Difference]: Finished difference. Result has 217 places, 149 transitions, 3217 flow [2020-10-16 03:24:24,563 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3017, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3217, PETRI_PLACES=217, PETRI_TRANSITIONS=149} [2020-10-16 03:24:24,563 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 199 predicate places. [2020-10-16 03:24:24,563 INFO L481 AbstractCegarLoop]: Abstraction has has 217 places, 149 transitions, 3217 flow [2020-10-16 03:24:24,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:24:24,563 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:24,563 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:24,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 03:24:24,764 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:24,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2146415779, now seen corresponding path program 35 times [2020-10-16 03:24:24,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:24,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610442605] [2020-10-16 03:24:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:24,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610442605] [2020-10-16 03:24:24,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884694335] [2020-10-16 03:24:24,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:24,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 03:24:24,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:24,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:24:24,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:24,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:24,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:24,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 03:24:24,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014358618] [2020-10-16 03:24:24,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 03:24:24,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:24,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 03:24:24,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-16 03:24:24,965 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:24,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 149 transitions, 3217 flow. Second operand 15 states. [2020-10-16 03:24:24,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:24,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:24,966 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:25,420 INFO L129 PetriNetUnfolder]: 141/366 cut-off events. [2020-10-16 03:24:25,420 INFO L130 PetriNetUnfolder]: For 26136/26138 co-relation queries the response was YES. [2020-10-16 03:24:25,424 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4938 conditions, 366 events. 141/366 cut-off events. For 26136/26138 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1769 event pairs, 0 based on Foata normal form. 4/370 useless extension candidates. Maximal degree in co-relation 4837. Up to 213 conditions per place. [2020-10-16 03:24:25,430 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 71 selfloop transitions, 92 changer transitions 0/170 dead transitions. [2020-10-16 03:24:25,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 170 transitions, 4473 flow [2020-10-16 03:24:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 03:24:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 03:24:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1281 transitions. [2020-10-16 03:24:25,432 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742105263157895 [2020-10-16 03:24:25,432 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1281 transitions. [2020-10-16 03:24:25,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1281 transitions. [2020-10-16 03:24:25,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:25,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1281 transitions. [2020-10-16 03:24:25,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 03:24:25,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 03:24:25,436 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 03:24:25,437 INFO L185 Difference]: Start difference. First operand has 217 places, 149 transitions, 3217 flow. Second operand 19 states and 1281 transitions. [2020-10-16 03:24:25,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 170 transitions, 4473 flow [2020-10-16 03:24:25,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 170 transitions, 4277 flow, removed 58 selfloop flow, removed 13 redundant places. [2020-10-16 03:24:25,542 INFO L241 Difference]: Finished difference. Result has 228 places, 155 transitions, 3514 flow [2020-10-16 03:24:25,542 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3514, PETRI_PLACES=228, PETRI_TRANSITIONS=155} [2020-10-16 03:24:25,543 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 210 predicate places. [2020-10-16 03:24:25,543 INFO L481 AbstractCegarLoop]: Abstraction has has 228 places, 155 transitions, 3514 flow [2020-10-16 03:24:25,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 03:24:25,543 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:25,543 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:25,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 03:24:25,752 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:25,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1610965881, now seen corresponding path program 36 times [2020-10-16 03:24:25,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:25,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997150888] [2020-10-16 03:24:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:25,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997150888] [2020-10-16 03:24:25,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198342112] [2020-10-16 03:24:25,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:25,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 03:24:25,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:25,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:24:25,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:25,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:25,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 03:24:25,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285395769] [2020-10-16 03:24:25,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:24:25,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:25,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:24:25,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:24:25,916 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:25,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 155 transitions, 3514 flow. Second operand 14 states. [2020-10-16 03:24:25,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:25,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:25,917 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:26,348 INFO L129 PetriNetUnfolder]: 145/378 cut-off events. [2020-10-16 03:24:26,349 INFO L130 PetriNetUnfolder]: For 27306/27308 co-relation queries the response was YES. [2020-10-16 03:24:26,353 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5178 conditions, 378 events. 145/378 cut-off events. For 27306/27308 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1828 event pairs, 0 based on Foata normal form. 2/380 useless extension candidates. Maximal degree in co-relation 5071. Up to 221 conditions per place. [2020-10-16 03:24:26,358 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 41 selfloop transitions, 130 changer transitions 0/178 dead transitions. [2020-10-16 03:24:26,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 178 transitions, 4938 flow [2020-10-16 03:24:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 03:24:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 03:24:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1485 transitions. [2020-10-16 03:24:26,361 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:24:26,361 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1485 transitions. [2020-10-16 03:24:26,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1485 transitions. [2020-10-16 03:24:26,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:26,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1485 transitions. [2020-10-16 03:24:26,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 03:24:26,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 03:24:26,366 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 03:24:26,366 INFO L185 Difference]: Start difference. First operand has 228 places, 155 transitions, 3514 flow. Second operand 22 states and 1485 transitions. [2020-10-16 03:24:26,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 178 transitions, 4938 flow [2020-10-16 03:24:26,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 178 transitions, 4709 flow, removed 63 selfloop flow, removed 12 redundant places. [2020-10-16 03:24:26,497 INFO L241 Difference]: Finished difference. Result has 239 places, 159 transitions, 3758 flow [2020-10-16 03:24:26,498 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3327, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3758, PETRI_PLACES=239, PETRI_TRANSITIONS=159} [2020-10-16 03:24:26,498 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 221 predicate places. [2020-10-16 03:24:26,498 INFO L481 AbstractCegarLoop]: Abstraction has has 239 places, 159 transitions, 3758 flow [2020-10-16 03:24:26,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:24:26,498 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:26,498 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:26,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 03:24:26,699 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:26,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1594878741, now seen corresponding path program 37 times [2020-10-16 03:24:26,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:26,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131934559] [2020-10-16 03:24:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:26,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131934559] [2020-10-16 03:24:26,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481676592] [2020-10-16 03:24:26,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:26,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:24:26,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:26,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:26,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:26,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 03:24:26,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702899756] [2020-10-16 03:24:26,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 03:24:26,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:26,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 03:24:26,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 03:24:26,873 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:26,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 159 transitions, 3758 flow. Second operand 15 states. [2020-10-16 03:24:26,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:26,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:26,874 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:27,441 INFO L129 PetriNetUnfolder]: 149/391 cut-off events. [2020-10-16 03:24:27,441 INFO L130 PetriNetUnfolder]: For 27860/27862 co-relation queries the response was YES. [2020-10-16 03:24:27,444 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5417 conditions, 391 events. 149/391 cut-off events. For 27860/27862 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1935 event pairs, 0 based on Foata normal form. 4/395 useless extension candidates. Maximal degree in co-relation 5308. Up to 229 conditions per place. [2020-10-16 03:24:27,447 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 39 selfloop transitions, 136 changer transitions 0/182 dead transitions. [2020-10-16 03:24:27,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 182 transitions, 5194 flow [2020-10-16 03:24:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 03:24:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 03:24:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1553 transitions. [2020-10-16 03:24:27,450 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752173913043479 [2020-10-16 03:24:27,450 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1553 transitions. [2020-10-16 03:24:27,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1553 transitions. [2020-10-16 03:24:27,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:27,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1553 transitions. [2020-10-16 03:24:27,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 03:24:27,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 03:24:27,455 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 03:24:27,456 INFO L185 Difference]: Start difference. First operand has 239 places, 159 transitions, 3758 flow. Second operand 23 states and 1553 transitions. [2020-10-16 03:24:27,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 182 transitions, 5194 flow [2020-10-16 03:24:27,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 182 transitions, 4841 flow, removed 61 selfloop flow, removed 19 redundant places. [2020-10-16 03:24:27,566 INFO L241 Difference]: Finished difference. Result has 244 places, 163 transitions, 3902 flow [2020-10-16 03:24:27,566 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3902, PETRI_PLACES=244, PETRI_TRANSITIONS=163} [2020-10-16 03:24:27,567 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 226 predicate places. [2020-10-16 03:24:27,567 INFO L481 AbstractCegarLoop]: Abstraction has has 244 places, 163 transitions, 3902 flow [2020-10-16 03:24:27,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 03:24:27,567 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:27,567 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:27,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 03:24:27,768 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:27,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:27,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1594388631, now seen corresponding path program 38 times [2020-10-16 03:24:27,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:27,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426443788] [2020-10-16 03:24:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:27,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426443788] [2020-10-16 03:24:27,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973467258] [2020-10-16 03:24:27,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:27,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:27,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:27,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:24:27,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:27,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:27,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 03:24:27,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80563255] [2020-10-16 03:24:27,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:24:27,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:27,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:24:27,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:24:27,939 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:27,940 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 163 transitions, 3902 flow. Second operand 14 states. [2020-10-16 03:24:27,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:27,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:27,941 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:28,408 INFO L129 PetriNetUnfolder]: 160/417 cut-off events. [2020-10-16 03:24:28,408 INFO L130 PetriNetUnfolder]: For 30206/30212 co-relation queries the response was YES. [2020-10-16 03:24:28,412 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5916 conditions, 417 events. 160/417 cut-off events. For 30206/30212 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2062 event pairs, 0 based on Foata normal form. 5/422 useless extension candidates. Maximal degree in co-relation 5805. Up to 247 conditions per place. [2020-10-16 03:24:28,416 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 151 changer transitions 0/193 dead transitions. [2020-10-16 03:24:28,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 193 transitions, 5706 flow [2020-10-16 03:24:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 03:24:28,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 03:24:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1622 transitions. [2020-10-16 03:24:28,418 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 03:24:28,418 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1622 transitions. [2020-10-16 03:24:28,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1622 transitions. [2020-10-16 03:24:28,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:28,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1622 transitions. [2020-10-16 03:24:28,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 03:24:28,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 03:24:28,424 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 03:24:28,424 INFO L185 Difference]: Start difference. First operand has 244 places, 163 transitions, 3902 flow. Second operand 24 states and 1622 transitions. [2020-10-16 03:24:28,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 193 transitions, 5706 flow [2020-10-16 03:24:28,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 193 transitions, 5327 flow, removed 72 selfloop flow, removed 20 redundant places. [2020-10-16 03:24:28,537 INFO L241 Difference]: Finished difference. Result has 251 places, 171 transitions, 4272 flow [2020-10-16 03:24:28,537 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3583, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4272, PETRI_PLACES=251, PETRI_TRANSITIONS=171} [2020-10-16 03:24:28,537 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 233 predicate places. [2020-10-16 03:24:28,537 INFO L481 AbstractCegarLoop]: Abstraction has has 251 places, 171 transitions, 4272 flow [2020-10-16 03:24:28,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:24:28,538 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:28,538 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:28,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 03:24:28,738 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:28,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1723642493, now seen corresponding path program 39 times [2020-10-16 03:24:28,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:28,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257180919] [2020-10-16 03:24:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:28,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257180919] [2020-10-16 03:24:28,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49876307] [2020-10-16 03:24:28,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:28,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 03:24:28,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:24:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:28,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:28,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:28,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 03:24:28,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124721951] [2020-10-16 03:24:28,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 03:24:28,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:28,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 03:24:28,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 03:24:28,936 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:28,937 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 171 transitions, 4272 flow. Second operand 15 states. [2020-10-16 03:24:28,937 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:28,937 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:28,937 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:29,551 INFO L129 PetriNetUnfolder]: 157/410 cut-off events. [2020-10-16 03:24:29,552 INFO L130 PetriNetUnfolder]: For 33246/33248 co-relation queries the response was YES. [2020-10-16 03:24:29,556 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6005 conditions, 410 events. 157/410 cut-off events. For 33246/33248 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2059 event pairs, 0 based on Foata normal form. 4/414 useless extension candidates. Maximal degree in co-relation 5890. Up to 243 conditions per place. [2020-10-16 03:24:29,563 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 32 selfloop transitions, 154 changer transitions 0/193 dead transitions. [2020-10-16 03:24:29,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 193 transitions, 5810 flow [2020-10-16 03:24:29,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 03:24:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 03:24:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1689 transitions. [2020-10-16 03:24:29,566 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6756 [2020-10-16 03:24:29,566 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1689 transitions. [2020-10-16 03:24:29,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1689 transitions. [2020-10-16 03:24:29,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:29,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1689 transitions. [2020-10-16 03:24:29,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 03:24:29,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 03:24:29,574 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 03:24:29,574 INFO L185 Difference]: Start difference. First operand has 251 places, 171 transitions, 4272 flow. Second operand 25 states and 1689 transitions. [2020-10-16 03:24:29,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 193 transitions, 5810 flow [2020-10-16 03:24:29,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 193 transitions, 5341 flow, removed 115 selfloop flow, removed 18 redundant places. [2020-10-16 03:24:29,723 INFO L241 Difference]: Finished difference. Result has 259 places, 172 transitions, 4224 flow [2020-10-16 03:24:29,723 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4224, PETRI_PLACES=259, PETRI_TRANSITIONS=172} [2020-10-16 03:24:29,724 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 241 predicate places. [2020-10-16 03:24:29,724 INFO L481 AbstractCegarLoop]: Abstraction has has 259 places, 172 transitions, 4224 flow [2020-10-16 03:24:29,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 03:24:29,724 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:29,724 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:29,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 03:24:29,932 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1991622277, now seen corresponding path program 40 times [2020-10-16 03:24:29,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:29,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92100278] [2020-10-16 03:24:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:30,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92100278] [2020-10-16 03:24:30,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377101654] [2020-10-16 03:24:30,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:30,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:30,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:30,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:24:30,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:30,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:30,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:30,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 03:24:30,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196998317] [2020-10-16 03:24:30,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 03:24:30,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:30,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 03:24:30,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 03:24:30,125 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:30,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 172 transitions, 4224 flow. Second operand 15 states. [2020-10-16 03:24:30,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:30,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:30,126 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:30,729 INFO L129 PetriNetUnfolder]: 160/415 cut-off events. [2020-10-16 03:24:30,729 INFO L130 PetriNetUnfolder]: For 35098/35100 co-relation queries the response was YES. [2020-10-16 03:24:30,734 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6116 conditions, 415 events. 160/415 cut-off events. For 35098/35100 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2076 event pairs, 0 based on Foata normal form. 3/418 useless extension candidates. Maximal degree in co-relation 5999. Up to 243 conditions per place. [2020-10-16 03:24:30,740 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 63 selfloop transitions, 126 changer transitions 0/196 dead transitions. [2020-10-16 03:24:30,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 196 transitions, 5838 flow [2020-10-16 03:24:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 03:24:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 03:24:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1621 transitions. [2020-10-16 03:24:30,743 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754166666666667 [2020-10-16 03:24:30,743 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1621 transitions. [2020-10-16 03:24:30,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1621 transitions. [2020-10-16 03:24:30,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:30,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1621 transitions. [2020-10-16 03:24:30,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 03:24:30,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 03:24:30,748 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 03:24:30,748 INFO L185 Difference]: Start difference. First operand has 259 places, 172 transitions, 4224 flow. Second operand 24 states and 1621 transitions. [2020-10-16 03:24:30,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 196 transitions, 5838 flow [2020-10-16 03:24:30,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 196 transitions, 5432 flow, removed 61 selfloop flow, removed 23 redundant places. [2020-10-16 03:24:30,876 INFO L241 Difference]: Finished difference. Result has 261 places, 175 transitions, 4320 flow [2020-10-16 03:24:30,876 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4320, PETRI_PLACES=261, PETRI_TRANSITIONS=175} [2020-10-16 03:24:30,877 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 243 predicate places. [2020-10-16 03:24:30,877 INFO L481 AbstractCegarLoop]: Abstraction has has 261 places, 175 transitions, 4320 flow [2020-10-16 03:24:30,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 03:24:30,877 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:30,877 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:31,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 03:24:31,078 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:31,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:31,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1893293424, now seen corresponding path program 41 times [2020-10-16 03:24:31,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:31,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451631865] [2020-10-16 03:24:31,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:31,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451631865] [2020-10-16 03:24:31,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094558562] [2020-10-16 03:24:31,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:31,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 03:24:31,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:31,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 03:24:31,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:31,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 03:24:31,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-10-16 03:24:31,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034130776] [2020-10-16 03:24:31,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:24:31,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:24:31,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-16 03:24:31,235 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 100 [2020-10-16 03:24:31,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 175 transitions, 4320 flow. Second operand 8 states. [2020-10-16 03:24:31,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:31,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 100 [2020-10-16 03:24:31,236 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:31,609 INFO L129 PetriNetUnfolder]: 384/949 cut-off events. [2020-10-16 03:24:31,609 INFO L130 PetriNetUnfolder]: For 84986/85066 co-relation queries the response was YES. [2020-10-16 03:24:31,637 INFO L80 FinitePrefix]: Finished finitePrefix Result has 12408 conditions, 949 events. 384/949 cut-off events. For 84986/85066 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6283 event pairs, 8 based on Foata normal form. 192/1141 useless extension candidates. Maximal degree in co-relation 12289. Up to 498 conditions per place. [2020-10-16 03:24:31,651 INFO L132 encePairwiseOnDemand]: 97/100 looper letters, 2 selfloop transitions, 75 changer transitions 98/235 dead transitions. [2020-10-16 03:24:31,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 235 transitions, 6156 flow [2020-10-16 03:24:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 03:24:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 03:24:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 646 transitions. [2020-10-16 03:24:31,653 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8075 [2020-10-16 03:24:31,654 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 646 transitions. [2020-10-16 03:24:31,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 646 transitions. [2020-10-16 03:24:31,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:31,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 646 transitions. [2020-10-16 03:24:31,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 03:24:31,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 03:24:31,657 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 03:24:31,657 INFO L185 Difference]: Start difference. First operand has 261 places, 175 transitions, 4320 flow. Second operand 8 states and 646 transitions. [2020-10-16 03:24:31,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 235 transitions, 6156 flow [2020-10-16 03:24:32,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 235 transitions, 5683 flow, removed 74 selfloop flow, removed 26 redundant places. [2020-10-16 03:24:32,113 INFO L241 Difference]: Finished difference. Result has 242 places, 137 transitions, 3449 flow [2020-10-16 03:24:32,113 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3659, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3449, PETRI_PLACES=242, PETRI_TRANSITIONS=137} [2020-10-16 03:24:32,113 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 224 predicate places. [2020-10-16 03:24:32,114 INFO L481 AbstractCegarLoop]: Abstraction has has 242 places, 137 transitions, 3449 flow [2020-10-16 03:24:32,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:24:32,114 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:32,114 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:32,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:32,329 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1541184401, now seen corresponding path program 42 times [2020-10-16 03:24:32,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:32,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545156747] [2020-10-16 03:24:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:32,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545156747] [2020-10-16 03:24:32,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184173424] [2020-10-16 03:24:32,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:32,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 03:24:32,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:32,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 03:24:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:32,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 03:24:32,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2020-10-16 03:24:32,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814953632] [2020-10-16 03:24:32,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:24:32,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:32,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:24:32,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 03:24:32,691 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 100 [2020-10-16 03:24:32,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 137 transitions, 3449 flow. Second operand 8 states. [2020-10-16 03:24:32,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:32,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 100 [2020-10-16 03:24:32,692 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:33,259 INFO L129 PetriNetUnfolder]: 674/1424 cut-off events. [2020-10-16 03:24:33,259 INFO L130 PetriNetUnfolder]: For 107291/107405 co-relation queries the response was YES. [2020-10-16 03:24:33,291 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17471 conditions, 1424 events. 674/1424 cut-off events. For 107291/107405 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9457 event pairs, 20 based on Foata normal form. 291/1715 useless extension candidates. Maximal degree in co-relation 17359. Up to 702 conditions per place. [2020-10-16 03:24:33,295 INFO L132 encePairwiseOnDemand]: 97/100 looper letters, 0 selfloop transitions, 0 changer transitions 172/172 dead transitions. [2020-10-16 03:24:33,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 172 transitions, 4374 flow [2020-10-16 03:24:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 03:24:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 03:24:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 646 transitions. [2020-10-16 03:24:33,297 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8075 [2020-10-16 03:24:33,298 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 646 transitions. [2020-10-16 03:24:33,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 646 transitions. [2020-10-16 03:24:33,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:33,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 646 transitions. [2020-10-16 03:24:33,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 03:24:33,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 03:24:33,300 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 03:24:33,300 INFO L185 Difference]: Start difference. First operand has 242 places, 137 transitions, 3449 flow. Second operand 8 states and 646 transitions. [2020-10-16 03:24:33,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 172 transitions, 4374 flow [2020-10-16 03:24:33,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 172 transitions, 2831 flow, removed 242 selfloop flow, removed 84 redundant places. [2020-10-16 03:24:33,681 INFO L241 Difference]: Finished difference. Result has 162 places, 0 transitions, 0 flow [2020-10-16 03:24:33,681 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=162, PETRI_TRANSITIONS=0} [2020-10-16 03:24:33,681 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 144 predicate places. [2020-10-16 03:24:33,681 INFO L481 AbstractCegarLoop]: Abstraction has has 162 places, 0 transitions, 0 flow [2020-10-16 03:24:33,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:24:33,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 03:24:33,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:24:33 BasicIcfg [2020-10-16 03:24:33,903 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 03:24:33,905 INFO L168 Benchmark]: Toolchain (without parser) took 35584.04 ms. Allocated memory was 250.6 MB in the beginning and 618.7 MB in the end (delta: 368.1 MB). Free memory was 206.4 MB in the beginning and 443.5 MB in the end (delta: -237.1 MB). Peak memory consumption was 414.7 MB. Max. memory is 14.2 GB. [2020-10-16 03:24:33,906 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 03:24:33,906 INFO L168 Benchmark]: CACSL2BoogieTranslator took 695.59 ms. Allocated memory was 250.6 MB in the beginning and 314.6 MB in the end (delta: 64.0 MB). Free memory was 206.4 MB in the beginning and 270.6 MB in the end (delta: -64.2 MB). Peak memory consumption was 32.9 MB. Max. memory is 14.2 GB. [2020-10-16 03:24:33,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.65 ms. Allocated memory is still 314.6 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 03:24:33,907 INFO L168 Benchmark]: Boogie Preprocessor took 42.94 ms. Allocated memory is still 314.6 MB. Free memory was 270.6 MB in the beginning and 268.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 03:24:33,908 INFO L168 Benchmark]: RCFGBuilder took 349.55 ms. Allocated memory is still 314.6 MB. Free memory was 268.1 MB in the beginning and 246.2 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-16 03:24:33,908 INFO L168 Benchmark]: TraceAbstraction took 34430.06 ms. Allocated memory was 314.6 MB in the beginning and 618.7 MB in the end (delta: 304.1 MB). Free memory was 246.2 MB in the beginning and 443.5 MB in the end (delta: -197.3 MB). Peak memory consumption was 390.6 MB. Max. memory is 14.2 GB. [2020-10-16 03:24:33,912 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 695.59 ms. Allocated memory was 250.6 MB in the beginning and 314.6 MB in the end (delta: 64.0 MB). Free memory was 206.4 MB in the beginning and 270.6 MB in the end (delta: -64.2 MB). Peak memory consumption was 32.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 59.65 ms. Allocated memory is still 314.6 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 42.94 ms. Allocated memory is still 314.6 MB. Free memory was 270.6 MB in the beginning and 268.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 349.55 ms. Allocated memory is still 314.6 MB. Free memory was 268.1 MB in the beginning and 246.2 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 34430.06 ms. Allocated memory was 314.6 MB in the beginning and 618.7 MB in the end (delta: 304.1 MB). Free memory was 246.2 MB in the beginning and 443.5 MB in the end (delta: -197.3 MB). Peak memory consumption was 390.6 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 55 PlacesBefore, 18 PlacesAfterwards, 53 TransitionsBefore, 13 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 881 MoverChecksTotal - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 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: 34.2s, OverallIterations: 44, TraceHistogramMax: 6, AutomataDifference: 17.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 96 SDtfs, 597 SDslu, 91 SDs, 0 SdLazy, 2505 SolverSat, 1323 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1376 GetRequests, 486 SyntacticMatches, 37 SemanticMatches, 853 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 10.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4320occurred in iteration=42, 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: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1226 NumberOfCodeBlocks, 1226 NumberOfCodeBlocksAsserted, 153 NumberOfCheckSat, 1143 ConstructedInterpolants, 0 QuantifiedInterpolants, 68187 SizeOfPredicates, 257 NumberOfNonLiveVariables, 3891 ConjunctsInSsa, 422 ConjunctsInUnsatCore, 83 InterpolantComputations, 7 PerfectInterpolantSequences, 62/840 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...