/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 00:00:48,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 00:00:48,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 00:00:48,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 00:00:48,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 00:00:48,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 00:00:48,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 00:00:48,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 00:00:48,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 00:00:48,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 00:00:48,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 00:00:48,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 00:00:48,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 00:00:48,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 00:00:48,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 00:00:48,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 00:00:48,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 00:00:48,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 00:00:48,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 00:00:48,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 00:00:48,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 00:00:48,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 00:00:48,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 00:00:48,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 00:00:48,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 00:00:48,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 00:00:48,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 00:00:48,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 00:00:48,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 00:00:48,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 00:00:48,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 00:00:48,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 00:00:48,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 00:00:48,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 00:00:48,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 00:00:48,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 00:00:48,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 00:00:48,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 00:00:48,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 00:00:48,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 00:00:48,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 00:00:48,488 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2020-10-16 00:00:48,538 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 00:00:48,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 00:00:48,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 00:00:48,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 00:00:48,541 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 00:00:48,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 00:00:48,542 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 00:00:48,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 00:00:48,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 00:00:48,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 00:00:48,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 00:00:48,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 00:00:48,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 00:00:48,545 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 00:00:48,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 00:00:48,545 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 00:00:48,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 00:00:48,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 00:00:48,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 00:00:48,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 00:00:48,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 00:00:48,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 00:00:48,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 00:00:48,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 00:00:48,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 00:00:48,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 00:00:48,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 00:00:48,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 00:00:48,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 00:00:48,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 00:00:48,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 00:00:48,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 00:00:48,912 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 00:00:48,913 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 00:00:48,914 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-16 00:00:49,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fbce9bdf/d11b4e654ab446bc8a67f06c24784ba6/FLAG0de37c75a [2020-10-16 00:00:49,643 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 00:00:49,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-16 00:00:49,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fbce9bdf/d11b4e654ab446bc8a67f06c24784ba6/FLAG0de37c75a [2020-10-16 00:00:49,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fbce9bdf/d11b4e654ab446bc8a67f06c24784ba6 [2020-10-16 00:00:49,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 00:00:49,896 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 00:00:49,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 00:00:49,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 00:00:49,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 00:00:49,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:00:49" (1/1) ... [2020-10-16 00:00:49,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b98c98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:49, skipping insertion in model container [2020-10-16 00:00:49,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:00:49" (1/1) ... [2020-10-16 00:00:49,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 00:00:49,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 00:00:50,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 00:00:50,601 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 00:00:50,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 00:00:50,756 INFO L208 MainTranslator]: Completed translation [2020-10-16 00:00:50,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50 WrapperNode [2020-10-16 00:00:50,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 00:00:50,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 00:00:50,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 00:00:50,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 00:00:50,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50" (1/1) ... [2020-10-16 00:00:50,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50" (1/1) ... [2020-10-16 00:00:50,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 00:00:50,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 00:00:50,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 00:00:50,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 00:00:50,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50" (1/1) ... [2020-10-16 00:00:50,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50" (1/1) ... [2020-10-16 00:00:50,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50" (1/1) ... [2020-10-16 00:00:50,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50" (1/1) ... [2020-10-16 00:00:50,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50" (1/1) ... [2020-10-16 00:00:50,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50" (1/1) ... [2020-10-16 00:00:50,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50" (1/1) ... [2020-10-16 00:00:50,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 00:00:50,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 00:00:50,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 00:00:50,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 00:00:50,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50" (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 00:00:50,939 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 00:00:50,939 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 00:00:50,939 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 00:00:50,939 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 00:00:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 00:00:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 00:00:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 00:00:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 00:00:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 00:00:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 00:00:50,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 00:00:50,945 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 00:00:51,336 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 00:00:51,337 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 00:00:51,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:00:51 BoogieIcfgContainer [2020-10-16 00:00:51,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 00:00:51,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 00:00:51,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 00:00:51,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 00:00:51,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:00:49" (1/3) ... [2020-10-16 00:00:51,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7703beb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:00:51, skipping insertion in model container [2020-10-16 00:00:51,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:50" (2/3) ... [2020-10-16 00:00:51,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7703beb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:00:51, skipping insertion in model container [2020-10-16 00:00:51,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:00:51" (3/3) ... [2020-10-16 00:00:51,348 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-10-16 00:00:51,362 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 00:00:51,371 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 00:00:51,373 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 00:00:51,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,401 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,401 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,402 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,402 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,403 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,403 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,404 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,404 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,404 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,404 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,407 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,408 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,412 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,412 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,413 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,413 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,413 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,413 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,420 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,421 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,421 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,421 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,422 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,422 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:51,439 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 00:00:51,458 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 00:00:51,458 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 00:00:51,458 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 00:00:51,459 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 00:00:51,459 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 00:00:51,459 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 00:00:51,459 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 00:00:51,459 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 00:00:51,472 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 00:00:51,515 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 00:00:51,516 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 00:00:51,521 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 00:00:51,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 00:00:51,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 112 flow [2020-10-16 00:00:51,531 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 00:00:51,534 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions, 112 flow [2020-10-16 00:00:51,537 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 53 transitions, 112 flow [2020-10-16 00:00:51,538 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 112 flow [2020-10-16 00:00:51,556 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 00:00:51,557 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 00:00:51,558 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 00:00:51,560 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 00:00:52,785 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 00:00:53,055 INFO L132 LiptonReduction]: Checked pairs total: 881 [2020-10-16 00:00:53,055 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 00:00:53,060 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1531 [2020-10-16 00:00:53,070 INFO L129 PetriNetUnfolder]: 2/12 cut-off events. [2020-10-16 00:00:53,071 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 00:00:53,071 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:53,072 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 00:00:53,073 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 00:00:53,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:53,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149174497] [2020-10-16 00:00:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:53,438 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 00:00:53,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149174497] [2020-10-16 00:00:53,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 00:00:53,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 00:00:53,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784673570] [2020-10-16 00:00:53,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 00:00:53,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:53,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 00:00:53,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 00:00:53,491 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:53,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 32 flow. Second operand 4 states. [2020-10-16 00:00:53,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:53,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:53,499 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:53,615 INFO L129 PetriNetUnfolder]: 29/61 cut-off events. [2020-10-16 00:00:53,616 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 00:00:53,617 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 00:00:53,619 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 7 selfloop transitions, 5 changer transitions 3/22 dead transitions. [2020-10-16 00:00:53,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 80 flow [2020-10-16 00:00:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 00:00:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 00:00:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2020-10-16 00:00:53,644 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.684 [2020-10-16 00:00:53,645 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 342 transitions. [2020-10-16 00:00:53,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 342 transitions. [2020-10-16 00:00:53,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:53,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 342 transitions. [2020-10-16 00:00:53,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 00:00:53,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 00:00:53,670 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 00:00:53,673 INFO L185 Difference]: Start difference. First operand has 18 places, 13 transitions, 32 flow. Second operand 5 states and 342 transitions. [2020-10-16 00:00:53,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 80 flow [2020-10-16 00:00:53,679 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 00:00:53,682 INFO L241 Difference]: Finished difference. Result has 23 places, 16 transitions, 65 flow [2020-10-16 00:00:53,686 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 00:00:53,688 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2020-10-16 00:00:53,688 INFO L481 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 65 flow [2020-10-16 00:00:53,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 00:00:53,688 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:53,688 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:53,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 00:00:53,689 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:53,690 INFO L82 PathProgramCache]: Analyzing trace with hash -2130400634, now seen corresponding path program 1 times [2020-10-16 00:00:53,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:53,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425512964] [2020-10-16 00:00:53,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:53,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425512964] [2020-10-16 00:00:53,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 00:00:53,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 00:00:53,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579476479] [2020-10-16 00:00:53,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 00:00:53,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:53,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 00:00:53,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 00:00:53,844 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:53,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 65 flow. Second operand 5 states. [2020-10-16 00:00:53,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:53,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:53,846 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:53,898 INFO L129 PetriNetUnfolder]: 17/42 cut-off events. [2020-10-16 00:00:53,898 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2020-10-16 00:00:53,899 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 00:00:53,900 INFO L132 encePairwiseOnDemand]: 96/100 looper letters, 12 selfloop transitions, 6 changer transitions 0/25 dead transitions. [2020-10-16 00:00:53,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 25 transitions, 147 flow [2020-10-16 00:00:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 00:00:53,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 00:00:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 271 transitions. [2020-10-16 00:00:53,905 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6775 [2020-10-16 00:00:53,905 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 271 transitions. [2020-10-16 00:00:53,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 271 transitions. [2020-10-16 00:00:53,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:53,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 271 transitions. [2020-10-16 00:00:53,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 00:00:53,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 00:00:53,909 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 00:00:53,910 INFO L185 Difference]: Start difference. First operand has 23 places, 16 transitions, 65 flow. Second operand 4 states and 271 transitions. [2020-10-16 00:00:53,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 25 transitions, 147 flow [2020-10-16 00:00:53,911 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 00:00:53,913 INFO L241 Difference]: Finished difference. Result has 26 places, 21 transitions, 114 flow [2020-10-16 00:00:53,914 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 00:00:53,915 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 8 predicate places. [2020-10-16 00:00:53,915 INFO L481 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 114 flow [2020-10-16 00:00:53,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 00:00:53,916 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:53,916 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:53,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 00:00:53,916 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:53,917 INFO L82 PathProgramCache]: Analyzing trace with hash 993324059, now seen corresponding path program 1 times [2020-10-16 00:00:53,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:53,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938674374] [2020-10-16 00:00:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:54,011 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 00:00:54,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938674374] [2020-10-16 00:00:54,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 00:00:54,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 00:00:54,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452491488] [2020-10-16 00:00:54,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 00:00:54,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 00:00:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 00:00:54,015 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:54,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 114 flow. Second operand 6 states. [2020-10-16 00:00:54,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:54,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:54,016 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:54,105 INFO L129 PetriNetUnfolder]: 28/67 cut-off events. [2020-10-16 00:00:54,106 INFO L130 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2020-10-16 00:00:54,107 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 00:00:54,108 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 13 selfloop transitions, 17 changer transitions 0/37 dead transitions. [2020-10-16 00:00:54,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 270 flow [2020-10-16 00:00:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 00:00:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 00:00:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 542 transitions. [2020-10-16 00:00:54,112 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6775 [2020-10-16 00:00:54,112 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 542 transitions. [2020-10-16 00:00:54,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 542 transitions. [2020-10-16 00:00:54,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:54,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 542 transitions. [2020-10-16 00:00:54,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 00:00:54,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 00:00:54,118 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 00:00:54,118 INFO L185 Difference]: Start difference. First operand has 26 places, 21 transitions, 114 flow. Second operand 8 states and 542 transitions. [2020-10-16 00:00:54,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 270 flow [2020-10-16 00:00:54,120 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 00:00:54,127 INFO L241 Difference]: Finished difference. Result has 37 places, 31 transitions, 245 flow [2020-10-16 00:00:54,127 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 00:00:54,127 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 19 predicate places. [2020-10-16 00:00:54,127 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 245 flow [2020-10-16 00:00:54,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 00:00:54,128 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:54,128 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:54,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 00:00:54,128 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:54,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1383900809, now seen corresponding path program 2 times [2020-10-16 00:00:54,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:54,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330853093] [2020-10-16 00:00:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:54,219 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 00:00:54,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330853093] [2020-10-16 00:00:54,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 00:00:54,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 00:00:54,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382072275] [2020-10-16 00:00:54,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 00:00:54,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:54,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 00:00:54,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 00:00:54,224 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:54,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 245 flow. Second operand 6 states. [2020-10-16 00:00:54,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:54,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:54,225 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:54,319 INFO L129 PetriNetUnfolder]: 25/61 cut-off events. [2020-10-16 00:00:54,319 INFO L130 PetriNetUnfolder]: For 207/213 co-relation queries the response was YES. [2020-10-16 00:00:54,320 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 00:00:54,321 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 12 selfloop transitions, 18 changer transitions 0/37 dead transitions. [2020-10-16 00:00:54,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 371 flow [2020-10-16 00:00:54,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 00:00:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 00:00:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2020-10-16 00:00:54,324 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6771428571428572 [2020-10-16 00:00:54,324 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2020-10-16 00:00:54,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2020-10-16 00:00:54,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:54,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2020-10-16 00:00:54,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 00:00:54,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 00:00:54,327 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 00:00:54,328 INFO L185 Difference]: Start difference. First operand has 37 places, 31 transitions, 245 flow. Second operand 7 states and 474 transitions. [2020-10-16 00:00:54,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 371 flow [2020-10-16 00:00:54,332 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 00:00:54,334 INFO L241 Difference]: Finished difference. Result has 42 places, 32 transitions, 280 flow [2020-10-16 00:00:54,334 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 00:00:54,334 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 24 predicate places. [2020-10-16 00:00:54,334 INFO L481 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 280 flow [2020-10-16 00:00:54,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 00:00:54,334 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:54,335 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:54,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 00:00:54,335 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:54,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1013031689, now seen corresponding path program 3 times [2020-10-16 00:00:54,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:54,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621555154] [2020-10-16 00:00:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:54,398 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 00:00:54,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621555154] [2020-10-16 00:00:54,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 00:00:54,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 00:00:54,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782780174] [2020-10-16 00:00:54,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 00:00:54,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:54,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 00:00:54,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 00:00:54,403 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:54,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 280 flow. Second operand 6 states. [2020-10-16 00:00:54,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:54,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:54,404 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:54,487 INFO L129 PetriNetUnfolder]: 30/73 cut-off events. [2020-10-16 00:00:54,488 INFO L130 PetriNetUnfolder]: For 319/325 co-relation queries the response was YES. [2020-10-16 00:00:54,489 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 00:00:54,490 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 21 selfloop transitions, 16 changer transitions 0/44 dead transitions. [2020-10-16 00:00:54,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 484 flow [2020-10-16 00:00:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 00:00:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 00:00:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2020-10-16 00:00:54,493 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6771428571428572 [2020-10-16 00:00:54,493 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2020-10-16 00:00:54,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2020-10-16 00:00:54,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:54,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2020-10-16 00:00:54,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 00:00:54,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 00:00:54,496 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 00:00:54,496 INFO L185 Difference]: Start difference. First operand has 42 places, 32 transitions, 280 flow. Second operand 7 states and 474 transitions. [2020-10-16 00:00:54,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 484 flow [2020-10-16 00:00:54,501 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 00:00:54,502 INFO L241 Difference]: Finished difference. Result has 46 places, 39 transitions, 370 flow [2020-10-16 00:00:54,502 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 00:00:54,503 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 28 predicate places. [2020-10-16 00:00:54,503 INFO L481 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 370 flow [2020-10-16 00:00:54,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 00:00:54,503 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:54,503 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:54,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 00:00:54,504 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:54,504 INFO L82 PathProgramCache]: Analyzing trace with hash 728810004, now seen corresponding path program 4 times [2020-10-16 00:00:54,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:54,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875394154] [2020-10-16 00:00:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:54,560 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 00:00:54,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875394154] [2020-10-16 00:00:54,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301437085] [2020-10-16 00:00:54,561 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 00:00:54,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:00:54,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 00:00:54,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:54,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:00:54,669 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 00:00:54,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:54,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 00:00:54,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828324109] [2020-10-16 00:00:54,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 00:00:54,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:54,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 00:00:54,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 00:00:54,673 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:54,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 370 flow. Second operand 8 states. [2020-10-16 00:00:54,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:54,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:54,674 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:54,784 INFO L129 PetriNetUnfolder]: 33/80 cut-off events. [2020-10-16 00:00:54,785 INFO L130 PetriNetUnfolder]: For 371/376 co-relation queries the response was YES. [2020-10-16 00:00:54,786 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 00:00:54,787 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 13 selfloop transitions, 28 changer transitions 0/48 dead transitions. [2020-10-16 00:00:54,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 566 flow [2020-10-16 00:00:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 00:00:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 00:00:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 541 transitions. [2020-10-16 00:00:54,790 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67625 [2020-10-16 00:00:54,790 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 541 transitions. [2020-10-16 00:00:54,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 541 transitions. [2020-10-16 00:00:54,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:54,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 541 transitions. [2020-10-16 00:00:54,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 00:00:54,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 00:00:54,795 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 00:00:54,796 INFO L185 Difference]: Start difference. First operand has 46 places, 39 transitions, 370 flow. Second operand 8 states and 541 transitions. [2020-10-16 00:00:54,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 566 flow [2020-10-16 00:00:54,800 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 00:00:54,802 INFO L241 Difference]: Finished difference. Result has 54 places, 42 transitions, 474 flow [2020-10-16 00:00:54,802 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 00:00:54,803 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 36 predicate places. [2020-10-16 00:00:54,803 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 474 flow [2020-10-16 00:00:54,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 00:00:54,803 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:54,803 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:55,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 00:00:55,018 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:55,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:55,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1735406889, now seen corresponding path program 5 times [2020-10-16 00:00:55,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:55,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687255513] [2020-10-16 00:00:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:55,076 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 00:00:55,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687255513] [2020-10-16 00:00:55,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917125369] [2020-10-16 00:00:55,076 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 00:00:55,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:00:55,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:55,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 00:00:55,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:55,153 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 00:00:55,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:55,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 00:00:55,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928958450] [2020-10-16 00:00:55,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 00:00:55,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 00:00:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 00:00:55,156 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:55,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 474 flow. Second operand 7 states. [2020-10-16 00:00:55,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:55,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:55,157 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:55,244 INFO L129 PetriNetUnfolder]: 35/85 cut-off events. [2020-10-16 00:00:55,244 INFO L130 PetriNetUnfolder]: For 593/602 co-relation queries the response was YES. [2020-10-16 00:00:55,245 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 00:00:55,246 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 28 selfloop transitions, 15 changer transitions 0/50 dead transitions. [2020-10-16 00:00:55,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 674 flow [2020-10-16 00:00:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 00:00:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 00:00:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 540 transitions. [2020-10-16 00:00:55,249 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:00:55,250 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 540 transitions. [2020-10-16 00:00:55,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 540 transitions. [2020-10-16 00:00:55,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:55,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 540 transitions. [2020-10-16 00:00:55,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 00:00:55,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 00:00:55,253 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 00:00:55,253 INFO L185 Difference]: Start difference. First operand has 54 places, 42 transitions, 474 flow. Second operand 8 states and 540 transitions. [2020-10-16 00:00:55,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 674 flow [2020-10-16 00:00:55,258 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 00:00:55,260 INFO L241 Difference]: Finished difference. Result has 59 places, 45 transitions, 509 flow [2020-10-16 00:00:55,261 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 00:00:55,261 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 41 predicate places. [2020-10-16 00:00:55,261 INFO L481 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 509 flow [2020-10-16 00:00:55,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 00:00:55,261 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:55,261 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:55,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:55,476 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:55,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1339228555, now seen corresponding path program 6 times [2020-10-16 00:00:55,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:55,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274579008] [2020-10-16 00:00:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:55,566 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 00:00:55,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274579008] [2020-10-16 00:00:55,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267783247] [2020-10-16 00:00:55,568 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 00:00:55,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 00:00:55,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:55,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 00:00:55,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:55,680 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 00:00:55,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:55,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 00:00:55,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696564453] [2020-10-16 00:00:55,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 00:00:55,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:55,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 00:00:55,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 00:00:55,684 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:55,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 509 flow. Second operand 8 states. [2020-10-16 00:00:55,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:55,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:55,686 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:55,935 INFO L129 PetriNetUnfolder]: 39/95 cut-off events. [2020-10-16 00:00:55,935 INFO L130 PetriNetUnfolder]: For 807/809 co-relation queries the response was YES. [2020-10-16 00:00:55,936 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 00:00:55,937 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 25 selfloop transitions, 24 changer transitions 0/56 dead transitions. [2020-10-16 00:00:55,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 789 flow [2020-10-16 00:00:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 00:00:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-16 00:00:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 744 transitions. [2020-10-16 00:00:55,941 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6763636363636364 [2020-10-16 00:00:55,941 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 744 transitions. [2020-10-16 00:00:55,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 744 transitions. [2020-10-16 00:00:55,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:55,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 744 transitions. [2020-10-16 00:00:55,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-16 00:00:55,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-16 00:00:55,947 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-16 00:00:55,947 INFO L185 Difference]: Start difference. First operand has 59 places, 45 transitions, 509 flow. Second operand 11 states and 744 transitions. [2020-10-16 00:00:55,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 789 flow [2020-10-16 00:00:55,953 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 00:00:55,955 INFO L241 Difference]: Finished difference. Result has 69 places, 49 transitions, 594 flow [2020-10-16 00:00:55,956 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 00:00:55,956 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 51 predicate places. [2020-10-16 00:00:55,956 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 594 flow [2020-10-16 00:00:55,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 00:00:55,956 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:55,956 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:56,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:56,170 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:56,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1051578980, now seen corresponding path program 7 times [2020-10-16 00:00:56,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:56,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4134246] [2020-10-16 00:00:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:56,260 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 00:00:56,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4134246] [2020-10-16 00:00:56,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816215275] [2020-10-16 00:00:56,261 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 00:00:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 00:00:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:56,342 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 00:00:56,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:56,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 00:00:56,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693767619] [2020-10-16 00:00:56,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 00:00:56,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:56,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 00:00:56,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 00:00:56,347 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:56,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 594 flow. Second operand 8 states. [2020-10-16 00:00:56,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:56,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:56,348 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:56,478 INFO L129 PetriNetUnfolder]: 41/102 cut-off events. [2020-10-16 00:00:56,478 INFO L130 PetriNetUnfolder]: For 952/961 co-relation queries the response was YES. [2020-10-16 00:00:56,482 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 00:00:56,484 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 25 selfloop transitions, 26 changer transitions 0/58 dead transitions. [2020-10-16 00:00:56,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 58 transitions, 858 flow [2020-10-16 00:00:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 00:00:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-16 00:00:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 675 transitions. [2020-10-16 00:00:56,488 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:00:56,488 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 675 transitions. [2020-10-16 00:00:56,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 675 transitions. [2020-10-16 00:00:56,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:56,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 675 transitions. [2020-10-16 00:00:56,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-16 00:00:56,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-16 00:00:56,493 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-16 00:00:56,493 INFO L185 Difference]: Start difference. First operand has 69 places, 49 transitions, 594 flow. Second operand 10 states and 675 transitions. [2020-10-16 00:00:56,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 58 transitions, 858 flow [2020-10-16 00:00:56,501 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 00:00:56,504 INFO L241 Difference]: Finished difference. Result has 75 places, 51 transitions, 632 flow [2020-10-16 00:00:56,505 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 00:00:56,505 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 57 predicate places. [2020-10-16 00:00:56,505 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 632 flow [2020-10-16 00:00:56,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 00:00:56,505 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:56,505 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:56,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:56,720 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:56,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:56,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1117784062, now seen corresponding path program 8 times [2020-10-16 00:00:56,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:56,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856854418] [2020-10-16 00:00:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:56,785 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 00:00:56,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856854418] [2020-10-16 00:00:56,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422062844] [2020-10-16 00:00:56,786 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 00:00:56,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:00:56,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:56,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 00:00:56,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:56,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:56,880 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 00:00:56,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:56,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 00:00:56,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721748846] [2020-10-16 00:00:56,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 00:00:56,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:56,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 00:00:56,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 00:00:56,882 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:56,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 632 flow. Second operand 9 states. [2020-10-16 00:00:56,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:56,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:56,883 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:57,061 INFO L129 PetriNetUnfolder]: 45/114 cut-off events. [2020-10-16 00:00:57,061 INFO L130 PetriNetUnfolder]: For 1113/1115 co-relation queries the response was YES. [2020-10-16 00:00:57,062 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 00:00:57,064 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 23 selfloop transitions, 32 changer transitions 0/62 dead transitions. [2020-10-16 00:00:57,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 62 transitions, 936 flow [2020-10-16 00:00:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 00:00:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-16 00:00:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 743 transitions. [2020-10-16 00:00:57,067 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754545454545454 [2020-10-16 00:00:57,067 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 743 transitions. [2020-10-16 00:00:57,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 743 transitions. [2020-10-16 00:00:57,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:57,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 743 transitions. [2020-10-16 00:00:57,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-16 00:00:57,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-16 00:00:57,072 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-16 00:00:57,072 INFO L185 Difference]: Start difference. First operand has 75 places, 51 transitions, 632 flow. Second operand 11 states and 743 transitions. [2020-10-16 00:00:57,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 62 transitions, 936 flow [2020-10-16 00:00:57,079 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 00:00:57,081 INFO L241 Difference]: Finished difference. Result has 80 places, 55 transitions, 714 flow [2020-10-16 00:00:57,081 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 00:00:57,082 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 62 predicate places. [2020-10-16 00:00:57,082 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 714 flow [2020-10-16 00:00:57,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 00:00:57,082 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:57,082 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:57,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 00:00:57,294 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1510678266, now seen corresponding path program 9 times [2020-10-16 00:00:57,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:57,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126647213] [2020-10-16 00:00:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:57,357 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 00:00:57,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126647213] [2020-10-16 00:00:57,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751897482] [2020-10-16 00:00:57,358 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 00:00:57,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 00:00:57,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:57,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 00:00:57,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:57,432 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 00:00:57,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:57,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 00:00:57,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171885780] [2020-10-16 00:00:57,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 00:00:57,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 00:00:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 00:00:57,435 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:57,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 714 flow. Second operand 8 states. [2020-10-16 00:00:57,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:57,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:57,436 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:57,597 INFO L129 PetriNetUnfolder]: 56/139 cut-off events. [2020-10-16 00:00:57,598 INFO L130 PetriNetUnfolder]: For 1641/1643 co-relation queries the response was YES. [2020-10-16 00:00:57,599 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 00:00:57,601 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 19 selfloop transitions, 47 changer transitions 0/73 dead transitions. [2020-10-16 00:00:57,601 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 73 transitions, 1192 flow [2020-10-16 00:00:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 00:00:57,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 00:00:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 812 transitions. [2020-10-16 00:00:57,604 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6766666666666666 [2020-10-16 00:00:57,604 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 812 transitions. [2020-10-16 00:00:57,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 812 transitions. [2020-10-16 00:00:57,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:57,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 812 transitions. [2020-10-16 00:00:57,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 00:00:57,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 00:00:57,610 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 00:00:57,610 INFO L185 Difference]: Start difference. First operand has 80 places, 55 transitions, 714 flow. Second operand 12 states and 812 transitions. [2020-10-16 00:00:57,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 73 transitions, 1192 flow [2020-10-16 00:00:57,620 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 00:00:57,623 INFO L241 Difference]: Finished difference. Result has 86 places, 63 transitions, 894 flow [2020-10-16 00:00:57,623 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 00:00:57,624 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 68 predicate places. [2020-10-16 00:00:57,624 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 63 transitions, 894 flow [2020-10-16 00:00:57,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 00:00:57,624 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:57,624 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:57,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:57,838 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:57,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1118290912, now seen corresponding path program 10 times [2020-10-16 00:00:57,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:57,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242793730] [2020-10-16 00:00:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:57,902 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 00:00:57,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242793730] [2020-10-16 00:00:57,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307101606] [2020-10-16 00:00:57,903 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 00:00:57,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:00:57,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:57,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 00:00:57,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:57,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:57,989 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 00:00:57,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:57,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 00:00:57,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047897407] [2020-10-16 00:00:57,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 00:00:57,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:57,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 00:00:57,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 00:00:57,993 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:57,994 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 63 transitions, 894 flow. Second operand 9 states. [2020-10-16 00:00:57,994 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:57,994 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:57,994 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:58,232 INFO L129 PetriNetUnfolder]: 53/133 cut-off events. [2020-10-16 00:00:58,232 INFO L130 PetriNetUnfolder]: For 1900/1906 co-relation queries the response was YES. [2020-10-16 00:00:58,233 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 00:00:58,236 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 16 selfloop transitions, 50 changer transitions 0/73 dead transitions. [2020-10-16 00:00:58,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 73 transitions, 1256 flow [2020-10-16 00:00:58,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 00:00:58,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 00:00:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 879 transitions. [2020-10-16 00:00:58,241 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6761538461538461 [2020-10-16 00:00:58,241 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 879 transitions. [2020-10-16 00:00:58,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 879 transitions. [2020-10-16 00:00:58,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:58,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 879 transitions. [2020-10-16 00:00:58,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 00:00:58,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 00:00:58,247 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 00:00:58,247 INFO L185 Difference]: Start difference. First operand has 86 places, 63 transitions, 894 flow. Second operand 13 states and 879 transitions. [2020-10-16 00:00:58,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 73 transitions, 1256 flow [2020-10-16 00:00:58,258 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 00:00:58,264 INFO L241 Difference]: Finished difference. Result has 93 places, 64 transitions, 922 flow [2020-10-16 00:00:58,264 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 00:00:58,265 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 75 predicate places. [2020-10-16 00:00:58,265 INFO L481 AbstractCegarLoop]: Abstraction has has 93 places, 64 transitions, 922 flow [2020-10-16 00:00:58,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 00:00:58,265 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:58,265 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:58,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:58,481 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1433571448, now seen corresponding path program 11 times [2020-10-16 00:00:58,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:58,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670131489] [2020-10-16 00:00:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:58,533 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 00:00:58,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670131489] [2020-10-16 00:00:58,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204250209] [2020-10-16 00:00:58,534 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 00:00:58,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:00:58,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 00:00:58,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:58,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:00:58,612 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 00:00:58,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:58,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 00:00:58,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216012425] [2020-10-16 00:00:58,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 00:00:58,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:58,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 00:00:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 00:00:58,618 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:58,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 64 transitions, 922 flow. Second operand 9 states. [2020-10-16 00:00:58,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:58,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:58,619 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:58,833 INFO L129 PetriNetUnfolder]: 56/139 cut-off events. [2020-10-16 00:00:58,833 INFO L130 PetriNetUnfolder]: For 2179/2181 co-relation queries the response was YES. [2020-10-16 00:00:58,834 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 00:00:58,836 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 34 changer transitions 0/76 dead transitions. [2020-10-16 00:00:58,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 76 transitions, 1322 flow [2020-10-16 00:00:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 00:00:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 00:00:58,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 811 transitions. [2020-10-16 00:00:58,840 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 00:00:58,840 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 811 transitions. [2020-10-16 00:00:58,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 811 transitions. [2020-10-16 00:00:58,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:58,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 811 transitions. [2020-10-16 00:00:58,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 00:00:58,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 00:00:58,845 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 00:00:58,845 INFO L185 Difference]: Start difference. First operand has 93 places, 64 transitions, 922 flow. Second operand 12 states and 811 transitions. [2020-10-16 00:00:58,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 76 transitions, 1322 flow [2020-10-16 00:00:58,858 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 00:00:58,860 INFO L241 Difference]: Finished difference. Result has 95 places, 67 transitions, 954 flow [2020-10-16 00:00:58,860 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 00:00:58,861 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 77 predicate places. [2020-10-16 00:00:58,861 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 954 flow [2020-10-16 00:00:58,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 00:00:58,861 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:58,861 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:59,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 00:00:59,076 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1246359991, now seen corresponding path program 12 times [2020-10-16 00:00:59,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:59,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803149171] [2020-10-16 00:00:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:59,149 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 00:00:59,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803149171] [2020-10-16 00:00:59,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670476937] [2020-10-16 00:00:59,150 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 00:00:59,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 00:00:59,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:59,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 00:00:59,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:59,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:00:59,250 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 00:00:59,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:59,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 00:00:59,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847305815] [2020-10-16 00:00:59,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 00:00:59,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:59,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 00:00:59,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 00:00:59,254 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:59,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 954 flow. Second operand 10 states. [2020-10-16 00:00:59,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:59,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:59,255 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:59,485 INFO L129 PetriNetUnfolder]: 59/146 cut-off events. [2020-10-16 00:00:59,485 INFO L130 PetriNetUnfolder]: For 1848/1850 co-relation queries the response was YES. [2020-10-16 00:00:59,487 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 00:00:59,489 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 19 selfloop transitions, 54 changer transitions 0/80 dead transitions. [2020-10-16 00:00:59,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 80 transitions, 1380 flow [2020-10-16 00:00:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 00:00:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 00:00:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 811 transitions. [2020-10-16 00:00:59,492 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 00:00:59,493 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 811 transitions. [2020-10-16 00:00:59,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 811 transitions. [2020-10-16 00:00:59,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:59,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 811 transitions. [2020-10-16 00:00:59,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 00:00:59,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 00:00:59,497 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 00:00:59,497 INFO L185 Difference]: Start difference. First operand has 95 places, 67 transitions, 954 flow. Second operand 12 states and 811 transitions. [2020-10-16 00:00:59,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 80 transitions, 1380 flow [2020-10-16 00:00:59,509 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 00:00:59,512 INFO L241 Difference]: Finished difference. Result has 99 places, 70 transitions, 1090 flow [2020-10-16 00:00:59,512 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 00:00:59,512 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 81 predicate places. [2020-10-16 00:00:59,512 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 70 transitions, 1090 flow [2020-10-16 00:00:59,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 00:00:59,513 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:59,513 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:59,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:59,726 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1053734124, now seen corresponding path program 13 times [2020-10-16 00:00:59,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:59,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41068142] [2020-10-16 00:00:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:59,802 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 00:00:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41068142] [2020-10-16 00:00:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871742414] [2020-10-16 00:00:59,803 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 00:00:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:59,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 00:00:59,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:59,891 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 00:00:59,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:59,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 00:00:59,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793514784] [2020-10-16 00:00:59,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 00:00:59,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:59,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 00:00:59,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 00:00:59,896 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:59,897 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 70 transitions, 1090 flow. Second operand 9 states. [2020-10-16 00:00:59,897 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:59,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:59,897 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:00,045 INFO L129 PetriNetUnfolder]: 61/151 cut-off events. [2020-10-16 00:01:00,046 INFO L130 PetriNetUnfolder]: For 2363/2369 co-relation queries the response was YES. [2020-10-16 00:01:00,047 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 00:01:00,049 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 55 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2020-10-16 00:01:00,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 79 transitions, 1454 flow [2020-10-16 00:01:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 00:01:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-16 00:01:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 674 transitions. [2020-10-16 00:01:00,052 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 00:01:00,052 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 674 transitions. [2020-10-16 00:01:00,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 674 transitions. [2020-10-16 00:01:00,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:00,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 674 transitions. [2020-10-16 00:01:00,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-16 00:01:00,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-16 00:01:00,056 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-16 00:01:00,057 INFO L185 Difference]: Start difference. First operand has 99 places, 70 transitions, 1090 flow. Second operand 10 states and 674 transitions. [2020-10-16 00:01:00,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 79 transitions, 1454 flow [2020-10-16 00:01:00,071 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 00:01:00,074 INFO L241 Difference]: Finished difference. Result has 101 places, 72 transitions, 1060 flow [2020-10-16 00:01:00,074 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 00:01:00,074 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 83 predicate places. [2020-10-16 00:01:00,074 INFO L481 AbstractCegarLoop]: Abstraction has has 101 places, 72 transitions, 1060 flow [2020-10-16 00:01:00,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 00:01:00,075 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:00,075 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:00,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 00:01:00,289 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:00,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1491024660, now seen corresponding path program 14 times [2020-10-16 00:01:00,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:00,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902813847] [2020-10-16 00:01:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:00,359 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 00:01:00,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902813847] [2020-10-16 00:01:00,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928190470] [2020-10-16 00:01:00,361 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 00:01:00,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:01:00,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:00,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 00:01:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:00,430 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 00:01:00,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:00,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 00:01:00,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657869714] [2020-10-16 00:01:00,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 00:01:00,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:00,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 00:01:00,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 00:01:00,433 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:00,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 72 transitions, 1060 flow. Second operand 10 states. [2020-10-16 00:01:00,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:00,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:00,434 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:00,725 INFO L129 PetriNetUnfolder]: 65/162 cut-off events. [2020-10-16 00:01:00,725 INFO L130 PetriNetUnfolder]: For 2893/2899 co-relation queries the response was YES. [2020-10-16 00:01:00,727 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 00:01:00,729 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 46 changer transitions 0/88 dead transitions. [2020-10-16 00:01:00,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 88 transitions, 1610 flow [2020-10-16 00:01:00,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 00:01:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-16 00:01:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1014 transitions. [2020-10-16 00:01:00,732 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 00:01:00,732 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1014 transitions. [2020-10-16 00:01:00,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1014 transitions. [2020-10-16 00:01:00,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:00,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1014 transitions. [2020-10-16 00:01:00,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-16 00:01:00,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-16 00:01:00,737 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-16 00:01:00,737 INFO L185 Difference]: Start difference. First operand has 101 places, 72 transitions, 1060 flow. Second operand 15 states and 1014 transitions. [2020-10-16 00:01:00,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 88 transitions, 1610 flow [2020-10-16 00:01:00,751 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 00:01:00,754 INFO L241 Difference]: Finished difference. Result has 111 places, 76 transitions, 1211 flow [2020-10-16 00:01:00,755 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 00:01:00,755 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 93 predicate places. [2020-10-16 00:01:00,755 INFO L481 AbstractCegarLoop]: Abstraction has has 111 places, 76 transitions, 1211 flow [2020-10-16 00:01:00,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 00:01:00,756 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:00,756 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:00,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 00:01:00,970 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:00,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:00,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1389554911, now seen corresponding path program 15 times [2020-10-16 00:01:00,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:00,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136064766] [2020-10-16 00:01:00,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:01,066 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 00:01:01,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136064766] [2020-10-16 00:01:01,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650654478] [2020-10-16 00:01:01,067 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 00:01:01,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 00:01:01,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:01,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 00:01:01,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:01,154 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 00:01:01,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:01,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 00:01:01,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192412528] [2020-10-16 00:01:01,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 00:01:01,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:01,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 00:01:01,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 00:01:01,157 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:01,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 76 transitions, 1211 flow. Second operand 10 states. [2020-10-16 00:01:01,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:01,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:01,157 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:01,327 INFO L129 PetriNetUnfolder]: 67/167 cut-off events. [2020-10-16 00:01:01,328 INFO L130 PetriNetUnfolder]: For 3566/3568 co-relation queries the response was YES. [2020-10-16 00:01:01,329 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 00:01:01,332 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 50 selfloop transitions, 30 changer transitions 0/87 dead transitions. [2020-10-16 00:01:01,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 87 transitions, 1677 flow [2020-10-16 00:01:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 00:01:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 00:01:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 809 transitions. [2020-10-16 00:01:01,335 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741666666666667 [2020-10-16 00:01:01,335 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 809 transitions. [2020-10-16 00:01:01,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 809 transitions. [2020-10-16 00:01:01,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:01,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 809 transitions. [2020-10-16 00:01:01,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 00:01:01,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 00:01:01,338 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 00:01:01,339 INFO L185 Difference]: Start difference. First operand has 111 places, 76 transitions, 1211 flow. Second operand 12 states and 809 transitions. [2020-10-16 00:01:01,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 87 transitions, 1677 flow [2020-10-16 00:01:01,355 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 00:01:01,358 INFO L241 Difference]: Finished difference. Result has 113 places, 78 transitions, 1210 flow [2020-10-16 00:01:01,358 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 00:01:01,358 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 95 predicate places. [2020-10-16 00:01:01,358 INFO L481 AbstractCegarLoop]: Abstraction has has 113 places, 78 transitions, 1210 flow [2020-10-16 00:01:01,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 00:01:01,359 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:01,359 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:01,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 00:01:01,572 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:01,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:01,573 INFO L82 PathProgramCache]: Analyzing trace with hash -470026489, now seen corresponding path program 16 times [2020-10-16 00:01:01,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:01,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758264451] [2020-10-16 00:01:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:01,651 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 00:01:01,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758264451] [2020-10-16 00:01:01,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943601770] [2020-10-16 00:01:01,652 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 00:01:01,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:01:01,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 00:01:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:01,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:01,752 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 00:01:01,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:01,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 00:01:01,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347725291] [2020-10-16 00:01:01,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:01:01,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:01,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:01:01,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:01:01,755 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:01,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 78 transitions, 1210 flow. Second operand 11 states. [2020-10-16 00:01:01,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:01,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:01,756 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:02,050 INFO L129 PetriNetUnfolder]: 71/179 cut-off events. [2020-10-16 00:01:02,053 INFO L130 PetriNetUnfolder]: For 4049/4051 co-relation queries the response was YES. [2020-10-16 00:01:02,054 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 00:01:02,057 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 44 selfloop transitions, 40 changer transitions 0/91 dead transitions. [2020-10-16 00:01:02,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 91 transitions, 1722 flow [2020-10-16 00:01:02,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 00:01:02,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 00:01:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 877 transitions. [2020-10-16 00:01:02,059 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6746153846153846 [2020-10-16 00:01:02,060 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 877 transitions. [2020-10-16 00:01:02,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 877 transitions. [2020-10-16 00:01:02,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:02,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 877 transitions. [2020-10-16 00:01:02,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 00:01:02,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 00:01:02,063 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 00:01:02,063 INFO L185 Difference]: Start difference. First operand has 113 places, 78 transitions, 1210 flow. Second operand 13 states and 877 transitions. [2020-10-16 00:01:02,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 91 transitions, 1722 flow [2020-10-16 00:01:02,080 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 00:01:02,083 INFO L241 Difference]: Finished difference. Result has 118 places, 82 transitions, 1306 flow [2020-10-16 00:01:02,083 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 00:01:02,083 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 100 predicate places. [2020-10-16 00:01:02,083 INFO L481 AbstractCegarLoop]: Abstraction has has 118 places, 82 transitions, 1306 flow [2020-10-16 00:01:02,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:01:02,083 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:02,084 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:02,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 00:01:02,296 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:02,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:02,297 INFO L82 PathProgramCache]: Analyzing trace with hash 17563211, now seen corresponding path program 17 times [2020-10-16 00:01:02,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:02,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135202981] [2020-10-16 00:01:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:02,365 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 00:01:02,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135202981] [2020-10-16 00:01:02,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126608455] [2020-10-16 00:01:02,366 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 00:01:02,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 00:01:02,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:02,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 00:01:02,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:02,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:02,482 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 00:01:02,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:02,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 00:01:02,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468630225] [2020-10-16 00:01:02,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:01:02,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:02,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:01:02,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:01:02,486 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:02,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 82 transitions, 1306 flow. Second operand 11 states. [2020-10-16 00:01:02,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:02,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:02,486 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:02,816 INFO L129 PetriNetUnfolder]: 75/188 cut-off events. [2020-10-16 00:01:02,816 INFO L130 PetriNetUnfolder]: For 4627/4629 co-relation queries the response was YES. [2020-10-16 00:01:02,818 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 00:01:02,821 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 20 selfloop transitions, 72 changer transitions 0/99 dead transitions. [2020-10-16 00:01:02,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 99 transitions, 1986 flow [2020-10-16 00:01:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 00:01:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-16 00:01:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1149 transitions. [2020-10-16 00:01:02,824 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758823529411765 [2020-10-16 00:01:02,824 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1149 transitions. [2020-10-16 00:01:02,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1149 transitions. [2020-10-16 00:01:02,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:02,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1149 transitions. [2020-10-16 00:01:02,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-16 00:01:02,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-16 00:01:02,828 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-16 00:01:02,828 INFO L185 Difference]: Start difference. First operand has 118 places, 82 transitions, 1306 flow. Second operand 17 states and 1149 transitions. [2020-10-16 00:01:02,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 99 transitions, 1986 flow [2020-10-16 00:01:02,846 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 00:01:02,849 INFO L241 Difference]: Finished difference. Result has 127 places, 86 transitions, 1484 flow [2020-10-16 00:01:02,849 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 00:01:02,850 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 109 predicate places. [2020-10-16 00:01:02,850 INFO L481 AbstractCegarLoop]: Abstraction has has 127 places, 86 transitions, 1484 flow [2020-10-16 00:01:02,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:01:02,850 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:02,850 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:03,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:03,063 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:03,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:03,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1022892103, now seen corresponding path program 18 times [2020-10-16 00:01:03,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:03,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321753386] [2020-10-16 00:01:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:03,123 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 00:01:03,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321753386] [2020-10-16 00:01:03,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135546366] [2020-10-16 00:01:03,123 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 00:01:03,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 00:01:03,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 00:01:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:03,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:01:03,207 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 00:01:03,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:03,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 00:01:03,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660232906] [2020-10-16 00:01:03,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:01:03,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:03,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:01:03,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:01:03,209 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:03,210 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 86 transitions, 1484 flow. Second operand 11 states. [2020-10-16 00:01:03,210 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:03,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:03,210 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:03,501 INFO L129 PetriNetUnfolder]: 78/195 cut-off events. [2020-10-16 00:01:03,501 INFO L130 PetriNetUnfolder]: For 5048/5050 co-relation queries the response was YES. [2020-10-16 00:01:03,503 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 00:01:03,507 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 41 selfloop transitions, 54 changer transitions 0/102 dead transitions. [2020-10-16 00:01:03,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 102 transitions, 2138 flow [2020-10-16 00:01:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 00:01:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 00:01:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1081 transitions. [2020-10-16 00:01:03,510 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675625 [2020-10-16 00:01:03,510 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1081 transitions. [2020-10-16 00:01:03,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1081 transitions. [2020-10-16 00:01:03,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:03,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1081 transitions. [2020-10-16 00:01:03,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 00:01:03,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 00:01:03,514 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 00:01:03,514 INFO L185 Difference]: Start difference. First operand has 127 places, 86 transitions, 1484 flow. Second operand 16 states and 1081 transitions. [2020-10-16 00:01:03,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 102 transitions, 2138 flow [2020-10-16 00:01:03,537 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 00:01:03,541 INFO L241 Difference]: Finished difference. Result has 131 places, 89 transitions, 1520 flow [2020-10-16 00:01:03,541 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 00:01:03,541 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 113 predicate places. [2020-10-16 00:01:03,541 INFO L481 AbstractCegarLoop]: Abstraction has has 131 places, 89 transitions, 1520 flow [2020-10-16 00:01:03,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:01:03,542 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:03,542 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:03,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:03,756 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:03,756 INFO L82 PathProgramCache]: Analyzing trace with hash 544475848, now seen corresponding path program 19 times [2020-10-16 00:01:03,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:03,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195543902] [2020-10-16 00:01:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:03,843 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 00:01:03,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195543902] [2020-10-16 00:01:03,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897766874] [2020-10-16 00:01:03,844 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 00:01:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:03,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 00:01:03,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:03,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:01:03,939 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 00:01:03,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:03,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 00:01:03,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070615683] [2020-10-16 00:01:03,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 00:01:03,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:03,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 00:01:03,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 00:01:03,941 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:03,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 89 transitions, 1520 flow. Second operand 12 states. [2020-10-16 00:01:03,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:03,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:03,943 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:04,271 INFO L129 PetriNetUnfolder]: 81/202 cut-off events. [2020-10-16 00:01:04,271 INFO L130 PetriNetUnfolder]: For 5395/5397 co-relation queries the response was YES. [2020-10-16 00:01:04,273 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 00:01:04,277 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 23 selfloop transitions, 76 changer transitions 0/106 dead transitions. [2020-10-16 00:01:04,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 106 transitions, 2254 flow [2020-10-16 00:01:04,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 00:01:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 00:01:04,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1081 transitions. [2020-10-16 00:01:04,280 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675625 [2020-10-16 00:01:04,280 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1081 transitions. [2020-10-16 00:01:04,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1081 transitions. [2020-10-16 00:01:04,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:04,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1081 transitions. [2020-10-16 00:01:04,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 00:01:04,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 00:01:04,287 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 00:01:04,287 INFO L185 Difference]: Start difference. First operand has 131 places, 89 transitions, 1520 flow. Second operand 16 states and 1081 transitions. [2020-10-16 00:01:04,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 106 transitions, 2254 flow [2020-10-16 00:01:04,311 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 00:01:04,315 INFO L241 Difference]: Finished difference. Result has 135 places, 92 transitions, 1647 flow [2020-10-16 00:01:04,315 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 00:01:04,316 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 117 predicate places. [2020-10-16 00:01:04,316 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 92 transitions, 1647 flow [2020-10-16 00:01:04,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 00:01:04,316 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:04,316 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:04,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:04,530 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:04,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash 973804627, now seen corresponding path program 20 times [2020-10-16 00:01:04,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:04,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221547038] [2020-10-16 00:01:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:04,624 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 00:01:04,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221547038] [2020-10-16 00:01:04,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704548094] [2020-10-16 00:01:04,625 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 00:01:04,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:01:04,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:04,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 00:01:04,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:04,689 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 00:01:04,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:04,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 00:01:04,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925209618] [2020-10-16 00:01:04,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:01:04,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:04,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:01:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:01:04,691 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:04,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 92 transitions, 1647 flow. Second operand 11 states. [2020-10-16 00:01:04,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:04,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:04,692 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:04,879 INFO L129 PetriNetUnfolder]: 83/208 cut-off events. [2020-10-16 00:01:04,879 INFO L130 PetriNetUnfolder]: For 5951/5953 co-relation queries the response was YES. [2020-10-16 00:01:04,881 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 00:01:04,886 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 77 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2020-10-16 00:01:04,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 103 transitions, 2207 flow [2020-10-16 00:01:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 00:01:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 00:01:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 808 transitions. [2020-10-16 00:01:04,888 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2020-10-16 00:01:04,889 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 808 transitions. [2020-10-16 00:01:04,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 808 transitions. [2020-10-16 00:01:04,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:04,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 808 transitions. [2020-10-16 00:01:04,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 00:01:04,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 00:01:04,892 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 00:01:04,893 INFO L185 Difference]: Start difference. First operand has 135 places, 92 transitions, 1647 flow. Second operand 12 states and 808 transitions. [2020-10-16 00:01:04,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 103 transitions, 2207 flow [2020-10-16 00:01:04,923 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 00:01:04,927 INFO L241 Difference]: Finished difference. Result has 135 places, 94 transitions, 1569 flow [2020-10-16 00:01:04,927 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 00:01:04,927 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 117 predicate places. [2020-10-16 00:01:04,927 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 94 transitions, 1569 flow [2020-10-16 00:01:04,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:01:04,928 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:04,928 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:05,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 00:01:05,141 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:05,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:05,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1417527963, now seen corresponding path program 21 times [2020-10-16 00:01:05,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:05,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889912899] [2020-10-16 00:01:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:05,220 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 00:01:05,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889912899] [2020-10-16 00:01:05,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982286210] [2020-10-16 00:01:05,220 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 00:01:05,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 00:01:05,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:05,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 00:01:05,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:05,279 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 00:01:05,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:05,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 00:01:05,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70617971] [2020-10-16 00:01:05,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:01:05,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:05,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:01:05,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:01:05,282 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:05,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 94 transitions, 1569 flow. Second operand 11 states. [2020-10-16 00:01:05,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:05,283 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:05,283 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:05,523 INFO L129 PetriNetUnfolder]: 87/218 cut-off events. [2020-10-16 00:01:05,523 INFO L130 PetriNetUnfolder]: For 7106/7108 co-relation queries the response was YES. [2020-10-16 00:01:05,527 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 00:01:05,531 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 66 selfloop transitions, 37 changer transitions 0/110 dead transitions. [2020-10-16 00:01:05,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 110 transitions, 2277 flow [2020-10-16 00:01:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 00:01:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 00:01:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1079 transitions. [2020-10-16 00:01:05,533 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674375 [2020-10-16 00:01:05,534 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1079 transitions. [2020-10-16 00:01:05,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1079 transitions. [2020-10-16 00:01:05,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:05,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1079 transitions. [2020-10-16 00:01:05,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 00:01:05,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 00:01:05,538 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 00:01:05,538 INFO L185 Difference]: Start difference. First operand has 135 places, 94 transitions, 1569 flow. Second operand 16 states and 1079 transitions. [2020-10-16 00:01:05,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 110 transitions, 2277 flow [2020-10-16 00:01:05,566 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 00:01:05,569 INFO L241 Difference]: Finished difference. Result has 146 places, 99 transitions, 1699 flow [2020-10-16 00:01:05,569 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 00:01:05,569 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 128 predicate places. [2020-10-16 00:01:05,570 INFO L481 AbstractCegarLoop]: Abstraction has has 146 places, 99 transitions, 1699 flow [2020-10-16 00:01:05,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:01:05,570 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:05,570 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:05,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 00:01:05,785 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:05,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:05,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1644884649, now seen corresponding path program 22 times [2020-10-16 00:01:05,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:05,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533622210] [2020-10-16 00:01:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:05,849 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 00:01:05,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533622210] [2020-10-16 00:01:05,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300113626] [2020-10-16 00:01:05,850 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 00:01:05,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:01:05,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:05,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 00:01:05,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:05,930 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 00:01:05,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:05,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 00:01:05,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563436074] [2020-10-16 00:01:05,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:01:05,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:05,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:01:05,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:01:05,932 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:05,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 99 transitions, 1699 flow. Second operand 11 states. [2020-10-16 00:01:05,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:05,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:05,933 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:06,259 INFO L129 PetriNetUnfolder]: 96/239 cut-off events. [2020-10-16 00:01:06,260 INFO L130 PetriNetUnfolder]: For 8833/8835 co-relation queries the response was YES. [2020-10-16 00:01:06,265 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 00:01:06,269 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 38 selfloop transitions, 76 changer transitions 0/121 dead transitions. [2020-10-16 00:01:06,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 121 transitions, 2717 flow [2020-10-16 00:01:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 00:01:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 00:01:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1352 transitions. [2020-10-16 00:01:06,279 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 00:01:06,280 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1352 transitions. [2020-10-16 00:01:06,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1352 transitions. [2020-10-16 00:01:06,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:06,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1352 transitions. [2020-10-16 00:01:06,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 00:01:06,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 00:01:06,284 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 00:01:06,284 INFO L185 Difference]: Start difference. First operand has 146 places, 99 transitions, 1699 flow. Second operand 20 states and 1352 transitions. [2020-10-16 00:01:06,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 121 transitions, 2717 flow [2020-10-16 00:01:06,307 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 00:01:06,310 INFO L241 Difference]: Finished difference. Result has 159 places, 105 transitions, 1985 flow [2020-10-16 00:01:06,310 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 00:01:06,311 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 141 predicate places. [2020-10-16 00:01:06,311 INFO L481 AbstractCegarLoop]: Abstraction has has 159 places, 105 transitions, 1985 flow [2020-10-16 00:01:06,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:01:06,311 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:06,311 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:06,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 00:01:06,513 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:06,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:06,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1644901389, now seen corresponding path program 23 times [2020-10-16 00:01:06,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:06,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494228572] [2020-10-16 00:01:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:06,584 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 00:01:06,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494228572] [2020-10-16 00:01:06,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423172205] [2020-10-16 00:01:06,585 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 00:01:06,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 00:01:06,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:06,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 00:01:06,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:06,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:06,665 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 00:01:06,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:06,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 00:01:06,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721205923] [2020-10-16 00:01:06,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 00:01:06,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:06,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 00:01:06,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 00:01:06,668 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:06,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 105 transitions, 1985 flow. Second operand 12 states. [2020-10-16 00:01:06,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:06,668 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:06,668 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:07,061 INFO L129 PetriNetUnfolder]: 93/234 cut-off events. [2020-10-16 00:01:07,061 INFO L130 PetriNetUnfolder]: For 9769/9775 co-relation queries the response was YES. [2020-10-16 00:01:07,063 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 00:01:07,066 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 38 selfloop transitions, 76 changer transitions 0/121 dead transitions. [2020-10-16 00:01:07,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 121 transitions, 2843 flow [2020-10-16 00:01:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 00:01:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 00:01:07,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1284 transitions. [2020-10-16 00:01:07,072 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757894736842105 [2020-10-16 00:01:07,072 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1284 transitions. [2020-10-16 00:01:07,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1284 transitions. [2020-10-16 00:01:07,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:07,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1284 transitions. [2020-10-16 00:01:07,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 00:01:07,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 00:01:07,077 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 00:01:07,077 INFO L185 Difference]: Start difference. First operand has 159 places, 105 transitions, 1985 flow. Second operand 19 states and 1284 transitions. [2020-10-16 00:01:07,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 121 transitions, 2843 flow [2020-10-16 00:01:07,119 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 00:01:07,123 INFO L241 Difference]: Finished difference. Result has 162 places, 106 transitions, 1941 flow [2020-10-16 00:01:07,123 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 00:01:07,123 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 144 predicate places. [2020-10-16 00:01:07,123 INFO L481 AbstractCegarLoop]: Abstraction has has 162 places, 106 transitions, 1941 flow [2020-10-16 00:01:07,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 00:01:07,124 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:07,124 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:07,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 00:01:07,340 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash 372575520, now seen corresponding path program 24 times [2020-10-16 00:01:07,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:07,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592160114] [2020-10-16 00:01:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:07,436 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 00:01:07,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592160114] [2020-10-16 00:01:07,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17700676] [2020-10-16 00:01:07,436 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 00:01:07,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 00:01:07,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:07,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 00:01:07,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:07,494 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 00:01:07,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:07,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 00:01:07,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944254760] [2020-10-16 00:01:07,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 00:01:07,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:07,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 00:01:07,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 00:01:07,497 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:07,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 106 transitions, 1941 flow. Second operand 12 states. [2020-10-16 00:01:07,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:07,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:07,497 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:07,719 INFO L129 PetriNetUnfolder]: 95/240 cut-off events. [2020-10-16 00:01:07,719 INFO L130 PetriNetUnfolder]: For 10532/10534 co-relation queries the response was YES. [2020-10-16 00:01:07,722 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 00:01:07,726 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 78 selfloop transitions, 34 changer transitions 0/119 dead transitions. [2020-10-16 00:01:07,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 119 transitions, 2681 flow [2020-10-16 00:01:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 00:01:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-16 00:01:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 943 transitions. [2020-10-16 00:01:07,728 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6735714285714286 [2020-10-16 00:01:07,728 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 943 transitions. [2020-10-16 00:01:07,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 943 transitions. [2020-10-16 00:01:07,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:07,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 943 transitions. [2020-10-16 00:01:07,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-16 00:01:07,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-16 00:01:07,731 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-16 00:01:07,731 INFO L185 Difference]: Start difference. First operand has 162 places, 106 transitions, 1941 flow. Second operand 14 states and 943 transitions. [2020-10-16 00:01:07,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 119 transitions, 2681 flow [2020-10-16 00:01:07,762 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 00:01:07,765 INFO L241 Difference]: Finished difference. Result has 160 places, 108 transitions, 1919 flow [2020-10-16 00:01:07,765 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 00:01:07,766 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 142 predicate places. [2020-10-16 00:01:07,766 INFO L481 AbstractCegarLoop]: Abstraction has has 160 places, 108 transitions, 1919 flow [2020-10-16 00:01:07,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 00:01:07,766 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:07,766 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:07,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 00:01:07,980 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:07,980 INFO L82 PathProgramCache]: Analyzing trace with hash -723873914, now seen corresponding path program 25 times [2020-10-16 00:01:07,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:07,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130830521] [2020-10-16 00:01:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:08,100 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 00:01:08,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130830521] [2020-10-16 00:01:08,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083505395] [2020-10-16 00:01:08,100 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 00:01:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:08,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 00:01:08,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:08,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:08,184 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 00:01:08,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:08,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 00:01:08,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447797851] [2020-10-16 00:01:08,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 00:01:08,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:08,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 00:01:08,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 00:01:08,186 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:08,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 108 transitions, 1919 flow. Second operand 13 states. [2020-10-16 00:01:08,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:08,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:08,186 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:08,463 INFO L129 PetriNetUnfolder]: 99/251 cut-off events. [2020-10-16 00:01:08,463 INFO L130 PetriNetUnfolder]: For 10493/10499 co-relation queries the response was YES. [2020-10-16 00:01:08,465 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 00:01:08,468 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 68 selfloop transitions, 48 changer transitions 0/123 dead transitions. [2020-10-16 00:01:08,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 123 transitions, 2688 flow [2020-10-16 00:01:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 00:01:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-16 00:01:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1011 transitions. [2020-10-16 00:01:08,470 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 00:01:08,470 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1011 transitions. [2020-10-16 00:01:08,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1011 transitions. [2020-10-16 00:01:08,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:08,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1011 transitions. [2020-10-16 00:01:08,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-16 00:01:08,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-16 00:01:08,473 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-16 00:01:08,473 INFO L185 Difference]: Start difference. First operand has 160 places, 108 transitions, 1919 flow. Second operand 15 states and 1011 transitions. [2020-10-16 00:01:08,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 123 transitions, 2688 flow [2020-10-16 00:01:08,502 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 00:01:08,505 INFO L241 Difference]: Finished difference. Result has 165 places, 112 transitions, 2032 flow [2020-10-16 00:01:08,505 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 00:01:08,505 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 147 predicate places. [2020-10-16 00:01:08,505 INFO L481 AbstractCegarLoop]: Abstraction has has 165 places, 112 transitions, 2032 flow [2020-10-16 00:01:08,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 00:01:08,506 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:08,506 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:08,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:08,707 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:08,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:08,707 INFO L82 PathProgramCache]: Analyzing trace with hash -301607478, now seen corresponding path program 26 times [2020-10-16 00:01:08,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:08,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209761776] [2020-10-16 00:01:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:08,800 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 00:01:08,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209761776] [2020-10-16 00:01:08,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539519164] [2020-10-16 00:01:08,803 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 00:01:08,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:01:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:08,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 00:01:08,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:08,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:08,887 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 00:01:08,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:08,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 00:01:08,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866333243] [2020-10-16 00:01:08,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 00:01:08,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:08,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 00:01:08,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 00:01:08,889 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:08,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 112 transitions, 2032 flow. Second operand 13 states. [2020-10-16 00:01:08,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:08,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:08,890 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:09,309 INFO L129 PetriNetUnfolder]: 103/263 cut-off events. [2020-10-16 00:01:09,310 INFO L130 PetriNetUnfolder]: For 11578/11584 co-relation queries the response was YES. [2020-10-16 00:01:09,311 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 00:01:09,315 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 36 selfloop transitions, 88 changer transitions 0/131 dead transitions. [2020-10-16 00:01:09,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 131 transitions, 2989 flow [2020-10-16 00:01:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 00:01:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 00:01:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1283 transitions. [2020-10-16 00:01:09,317 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752631578947368 [2020-10-16 00:01:09,317 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1283 transitions. [2020-10-16 00:01:09,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1283 transitions. [2020-10-16 00:01:09,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:09,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1283 transitions. [2020-10-16 00:01:09,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 00:01:09,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 00:01:09,319 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 00:01:09,320 INFO L185 Difference]: Start difference. First operand has 165 places, 112 transitions, 2032 flow. Second operand 19 states and 1283 transitions. [2020-10-16 00:01:09,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 131 transitions, 2989 flow [2020-10-16 00:01:09,350 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 00:01:09,354 INFO L241 Difference]: Finished difference. Result has 173 places, 116 transitions, 2211 flow [2020-10-16 00:01:09,354 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 00:01:09,355 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 155 predicate places. [2020-10-16 00:01:09,355 INFO L481 AbstractCegarLoop]: Abstraction has has 173 places, 116 transitions, 2211 flow [2020-10-16 00:01:09,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 00:01:09,355 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:09,355 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:09,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 00:01:09,568 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:09,568 INFO L82 PathProgramCache]: Analyzing trace with hash -301117368, now seen corresponding path program 27 times [2020-10-16 00:01:09,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:09,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078576794] [2020-10-16 00:01:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:09,649 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 00:01:09,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078576794] [2020-10-16 00:01:09,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510774796] [2020-10-16 00:01:09,651 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 00:01:09,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 00:01:09,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:09,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 00:01:09,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:09,712 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 00:01:09,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:09,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 00:01:09,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401196990] [2020-10-16 00:01:09,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 00:01:09,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 00:01:09,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 00:01:09,715 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:09,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 116 transitions, 2211 flow. Second operand 12 states. [2020-10-16 00:01:09,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:09,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:09,715 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:10,067 INFO L129 PetriNetUnfolder]: 112/285 cut-off events. [2020-10-16 00:01:10,067 INFO L130 PetriNetUnfolder]: For 12865/12871 co-relation queries the response was YES. [2020-10-16 00:01:10,070 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 00:01:10,073 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 29 selfloop transitions, 104 changer transitions 0/140 dead transitions. [2020-10-16 00:01:10,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 140 transitions, 3429 flow [2020-10-16 00:01:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 00:01:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 00:01:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1352 transitions. [2020-10-16 00:01:10,076 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 00:01:10,077 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1352 transitions. [2020-10-16 00:01:10,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1352 transitions. [2020-10-16 00:01:10,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:10,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1352 transitions. [2020-10-16 00:01:10,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 00:01:10,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 00:01:10,082 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 00:01:10,082 INFO L185 Difference]: Start difference. First operand has 173 places, 116 transitions, 2211 flow. Second operand 20 states and 1352 transitions. [2020-10-16 00:01:10,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 140 transitions, 3429 flow [2020-10-16 00:01:10,148 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 00:01:10,151 INFO L241 Difference]: Finished difference. Result has 180 places, 122 transitions, 2485 flow [2020-10-16 00:01:10,151 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 00:01:10,151 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 162 predicate places. [2020-10-16 00:01:10,151 INFO L481 AbstractCegarLoop]: Abstraction has has 180 places, 122 transitions, 2485 flow [2020-10-16 00:01:10,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 00:01:10,151 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:10,152 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:10,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 00:01:10,361 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2103231458, now seen corresponding path program 28 times [2020-10-16 00:01:10,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:10,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938857228] [2020-10-16 00:01:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:10,441 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 00:01:10,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938857228] [2020-10-16 00:01:10,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021752661] [2020-10-16 00:01:10,441 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 00:01:10,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:01:10,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:10,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 00:01:10,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:10,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:10,538 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 00:01:10,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:10,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 00:01:10,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112775892] [2020-10-16 00:01:10,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 00:01:10,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:10,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 00:01:10,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 00:01:10,540 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:10,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 122 transitions, 2485 flow. Second operand 13 states. [2020-10-16 00:01:10,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:10,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:10,541 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:11,012 INFO L129 PetriNetUnfolder]: 109/279 cut-off events. [2020-10-16 00:01:11,013 INFO L130 PetriNetUnfolder]: For 14260/14262 co-relation queries the response was YES. [2020-10-16 00:01:11,016 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 00:01:11,021 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 27 selfloop transitions, 106 changer transitions 0/140 dead transitions. [2020-10-16 00:01:11,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 140 transitions, 3525 flow [2020-10-16 00:01:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 00:01:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 00:01:11,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1419 transitions. [2020-10-16 00:01:11,024 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757142857142857 [2020-10-16 00:01:11,024 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1419 transitions. [2020-10-16 00:01:11,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1419 transitions. [2020-10-16 00:01:11,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:11,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1419 transitions. [2020-10-16 00:01:11,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 00:01:11,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 00:01:11,029 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 00:01:11,029 INFO L185 Difference]: Start difference. First operand has 180 places, 122 transitions, 2485 flow. Second operand 21 states and 1419 transitions. [2020-10-16 00:01:11,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 140 transitions, 3525 flow [2020-10-16 00:01:11,092 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 00:01:11,096 INFO L241 Difference]: Finished difference. Result has 187 places, 123 transitions, 2463 flow [2020-10-16 00:01:11,096 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 00:01:11,096 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 169 predicate places. [2020-10-16 00:01:11,097 INFO L481 AbstractCegarLoop]: Abstraction has has 187 places, 123 transitions, 2463 flow [2020-10-16 00:01:11,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 00:01:11,097 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:11,097 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:11,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:11,311 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:11,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:11,311 INFO L82 PathProgramCache]: Analyzing trace with hash -547648186, now seen corresponding path program 29 times [2020-10-16 00:01:11,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:11,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870149162] [2020-10-16 00:01:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:11,385 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 00:01:11,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870149162] [2020-10-16 00:01:11,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77029065] [2020-10-16 00:01:11,386 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 00:01:11,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 00:01:11,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 00:01:11,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:11,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:01:11,474 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 00:01:11,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:11,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 00:01:11,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439831241] [2020-10-16 00:01:11,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 00:01:11,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:11,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 00:01:11,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 00:01:11,478 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:11,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 123 transitions, 2463 flow. Second operand 13 states. [2020-10-16 00:01:11,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:11,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:11,479 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:11,952 INFO L129 PetriNetUnfolder]: 112/284 cut-off events. [2020-10-16 00:01:11,952 INFO L130 PetriNetUnfolder]: For 15335/15337 co-relation queries the response was YES. [2020-10-16 00:01:11,955 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 00:01:11,960 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 49 selfloop transitions, 86 changer transitions 0/142 dead transitions. [2020-10-16 00:01:11,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 142 transitions, 3559 flow [2020-10-16 00:01:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 00:01:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 00:01:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2020-10-16 00:01:11,963 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 00:01:11,963 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2020-10-16 00:01:11,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2020-10-16 00:01:11,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:11,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2020-10-16 00:01:11,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 00:01:11,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 00:01:11,968 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 00:01:11,968 INFO L185 Difference]: Start difference. First operand has 187 places, 123 transitions, 2463 flow. Second operand 20 states and 1351 transitions. [2020-10-16 00:01:11,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 142 transitions, 3559 flow [2020-10-16 00:01:12,030 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 00:01:12,034 INFO L241 Difference]: Finished difference. Result has 190 places, 126 transitions, 2559 flow [2020-10-16 00:01:12,034 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 00:01:12,035 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 172 predicate places. [2020-10-16 00:01:12,035 INFO L481 AbstractCegarLoop]: Abstraction has has 190 places, 126 transitions, 2559 flow [2020-10-16 00:01:12,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 00:01:12,035 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:12,035 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:12,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:12,249 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:12,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:12,250 INFO L82 PathProgramCache]: Analyzing trace with hash -744168569, now seen corresponding path program 30 times [2020-10-16 00:01:12,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:12,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519528231] [2020-10-16 00:01:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:12,340 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 00:01:12,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519528231] [2020-10-16 00:01:12,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165854974] [2020-10-16 00:01:12,341 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 00:01:12,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 00:01:12,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 00:01:12,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:12,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:01:12,430 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 00:01:12,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:12,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 00:01:12,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981222605] [2020-10-16 00:01:12,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:01:12,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:12,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:01:12,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:01:12,433 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:12,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 126 transitions, 2559 flow. Second operand 14 states. [2020-10-16 00:01:12,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:12,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:12,434 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:12,920 INFO L129 PetriNetUnfolder]: 115/291 cut-off events. [2020-10-16 00:01:12,920 INFO L130 PetriNetUnfolder]: For 14738/14740 co-relation queries the response was YES. [2020-10-16 00:01:12,923 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 00:01:12,926 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 30 selfloop transitions, 110 changer transitions 0/147 dead transitions. [2020-10-16 00:01:12,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 147 transitions, 3731 flow [2020-10-16 00:01:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 00:01:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 00:01:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2020-10-16 00:01:12,929 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 00:01:12,929 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2020-10-16 00:01:12,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2020-10-16 00:01:12,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:12,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2020-10-16 00:01:12,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 00:01:12,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 00:01:12,934 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 00:01:12,934 INFO L185 Difference]: Start difference. First operand has 190 places, 126 transitions, 2559 flow. Second operand 20 states and 1351 transitions. [2020-10-16 00:01:12,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 147 transitions, 3731 flow [2020-10-16 00:01:12,978 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 00:01:12,982 INFO L241 Difference]: Finished difference. Result has 194 places, 129 transitions, 2727 flow [2020-10-16 00:01:12,982 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 00:01:12,982 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 176 predicate places. [2020-10-16 00:01:12,982 INFO L481 AbstractCegarLoop]: Abstraction has has 194 places, 129 transitions, 2727 flow [2020-10-16 00:01:12,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:01:12,982 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:12,982 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:13,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 00:01:13,183 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:13,184 INFO L82 PathProgramCache]: Analyzing trace with hash -476608046, now seen corresponding path program 31 times [2020-10-16 00:01:13,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:13,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823674135] [2020-10-16 00:01:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:13,297 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 00:01:13,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823674135] [2020-10-16 00:01:13,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215618473] [2020-10-16 00:01:13,298 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 00:01:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:13,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 00:01:13,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:13,376 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 00:01:13,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:13,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 00:01:13,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063493650] [2020-10-16 00:01:13,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 00:01:13,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:13,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 00:01:13,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 00:01:13,380 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:13,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 129 transitions, 2727 flow. Second operand 13 states. [2020-10-16 00:01:13,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:13,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:13,381 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:13,668 INFO L129 PetriNetUnfolder]: 117/298 cut-off events. [2020-10-16 00:01:13,668 INFO L130 PetriNetUnfolder]: For 16631/16633 co-relation queries the response was YES. [2020-10-16 00:01:13,671 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 00:01:13,677 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 114 selfloop transitions, 21 changer transitions 0/142 dead transitions. [2020-10-16 00:01:13,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 142 transitions, 3587 flow [2020-10-16 00:01:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 00:01:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-16 00:01:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 942 transitions. [2020-10-16 00:01:13,679 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6728571428571428 [2020-10-16 00:01:13,679 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 942 transitions. [2020-10-16 00:01:13,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 942 transitions. [2020-10-16 00:01:13,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:13,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 942 transitions. [2020-10-16 00:01:13,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-16 00:01:13,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-16 00:01:13,683 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-16 00:01:13,683 INFO L185 Difference]: Start difference. First operand has 194 places, 129 transitions, 2727 flow. Second operand 14 states and 942 transitions. [2020-10-16 00:01:13,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 142 transitions, 3587 flow [2020-10-16 00:01:13,754 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 00:01:13,758 INFO L241 Difference]: Finished difference. Result has 192 places, 131 transitions, 2599 flow [2020-10-16 00:01:13,758 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 00:01:13,758 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 174 predicate places. [2020-10-16 00:01:13,758 INFO L481 AbstractCegarLoop]: Abstraction has has 192 places, 131 transitions, 2599 flow [2020-10-16 00:01:13,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 00:01:13,759 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:13,759 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:13,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:13,973 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:13,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:13,973 INFO L82 PathProgramCache]: Analyzing trace with hash -219980600, now seen corresponding path program 32 times [2020-10-16 00:01:13,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:13,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304106969] [2020-10-16 00:01:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:14,080 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 00:01:14,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304106969] [2020-10-16 00:01:14,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744093235] [2020-10-16 00:01:14,081 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 00:01:14,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:01:14,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 00:01:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:14,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:14,172 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 00:01:14,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:14,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 00:01:14,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56029075] [2020-10-16 00:01:14,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:01:14,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:14,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:01:14,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:01:14,174 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:14,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 131 transitions, 2599 flow. Second operand 14 states. [2020-10-16 00:01:14,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:14,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:14,175 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:14,514 INFO L129 PetriNetUnfolder]: 129/332 cut-off events. [2020-10-16 00:01:14,514 INFO L130 PetriNetUnfolder]: For 20515/20521 co-relation queries the response was YES. [2020-10-16 00:01:14,518 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 00:01:14,532 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 95 selfloop transitions, 54 changer transitions 0/156 dead transitions. [2020-10-16 00:01:14,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 156 transitions, 3849 flow [2020-10-16 00:01:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 00:01:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-16 00:01:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1146 transitions. [2020-10-16 00:01:14,534 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741176470588235 [2020-10-16 00:01:14,534 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1146 transitions. [2020-10-16 00:01:14,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1146 transitions. [2020-10-16 00:01:14,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:14,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1146 transitions. [2020-10-16 00:01:14,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-16 00:01:14,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-16 00:01:14,539 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-16 00:01:14,539 INFO L185 Difference]: Start difference. First operand has 192 places, 131 transitions, 2599 flow. Second operand 17 states and 1146 transitions. [2020-10-16 00:01:14,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 156 transitions, 3849 flow [2020-10-16 00:01:14,616 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 00:01:14,621 INFO L241 Difference]: Finished difference. Result has 203 places, 143 transitions, 3011 flow [2020-10-16 00:01:14,622 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 00:01:14,622 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 185 predicate places. [2020-10-16 00:01:14,622 INFO L481 AbstractCegarLoop]: Abstraction has has 203 places, 143 transitions, 3011 flow [2020-10-16 00:01:14,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:01:14,623 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:14,623 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:14,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 00:01:14,837 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash 202792686, now seen corresponding path program 33 times [2020-10-16 00:01:14,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:14,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218488711] [2020-10-16 00:01:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:14,938 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 00:01:14,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218488711] [2020-10-16 00:01:14,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134330448] [2020-10-16 00:01:14,939 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 00:01:14,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 00:01:14,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:14,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 00:01:14,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:15,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:15,014 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 00:01:15,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:15,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 00:01:15,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000502269] [2020-10-16 00:01:15,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:01:15,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:01:15,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:01:15,017 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:15,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 143 transitions, 3011 flow. Second operand 14 states. [2020-10-16 00:01:15,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:15,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:15,017 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:15,544 INFO L129 PetriNetUnfolder]: 133/342 cut-off events. [2020-10-16 00:01:15,545 INFO L130 PetriNetUnfolder]: For 22559/22565 co-relation queries the response was YES. [2020-10-16 00:01:15,549 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 00:01:15,555 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 47 selfloop transitions, 112 changer transitions 0/166 dead transitions. [2020-10-16 00:01:15,556 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 166 transitions, 4419 flow [2020-10-16 00:01:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 00:01:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 00:01:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1554 transitions. [2020-10-16 00:01:15,558 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6756521739130434 [2020-10-16 00:01:15,558 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1554 transitions. [2020-10-16 00:01:15,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1554 transitions. [2020-10-16 00:01:15,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:15,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1554 transitions. [2020-10-16 00:01:15,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 00:01:15,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 00:01:15,565 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 00:01:15,565 INFO L185 Difference]: Start difference. First operand has 203 places, 143 transitions, 3011 flow. Second operand 23 states and 1554 transitions. [2020-10-16 00:01:15,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 166 transitions, 4419 flow [2020-10-16 00:01:15,656 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 00:01:15,661 INFO L241 Difference]: Finished difference. Result has 218 places, 147 transitions, 3320 flow [2020-10-16 00:01:15,661 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 00:01:15,662 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 200 predicate places. [2020-10-16 00:01:15,662 INFO L481 AbstractCegarLoop]: Abstraction has has 218 places, 147 transitions, 3320 flow [2020-10-16 00:01:15,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:01:15,662 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:15,662 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:15,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:15,876 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1115003167, now seen corresponding path program 34 times [2020-10-16 00:01:15,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:15,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917887593] [2020-10-16 00:01:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:16,005 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 00:01:16,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917887593] [2020-10-16 00:01:16,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536675670] [2020-10-16 00:01:16,005 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 00:01:16,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:01:16,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:16,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:01:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:16,064 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 00:01:16,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:16,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 00:01:16,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793343228] [2020-10-16 00:01:16,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:01:16,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:16,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:01:16,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:01:16,066 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:16,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 147 transitions, 3320 flow. Second operand 14 states. [2020-10-16 00:01:16,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:16,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:16,067 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:16,357 INFO L129 PetriNetUnfolder]: 135/349 cut-off events. [2020-10-16 00:01:16,357 INFO L130 PetriNetUnfolder]: For 23865/23871 co-relation queries the response was YES. [2020-10-16 00:01:16,361 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 00:01:16,364 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 111 selfloop transitions, 44 changer transitions 0/162 dead transitions. [2020-10-16 00:01:16,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 162 transitions, 4362 flow [2020-10-16 00:01:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 00:01:16,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 00:01:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1077 transitions. [2020-10-16 00:01:16,366 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.673125 [2020-10-16 00:01:16,366 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1077 transitions. [2020-10-16 00:01:16,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1077 transitions. [2020-10-16 00:01:16,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:16,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1077 transitions. [2020-10-16 00:01:16,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 00:01:16,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 00:01:16,370 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 00:01:16,370 INFO L185 Difference]: Start difference. First operand has 218 places, 147 transitions, 3320 flow. Second operand 16 states and 1077 transitions. [2020-10-16 00:01:16,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 162 transitions, 4362 flow [2020-10-16 00:01:16,442 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 00:01:16,446 INFO L241 Difference]: Finished difference. Result has 217 places, 149 transitions, 3217 flow [2020-10-16 00:01:16,446 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 00:01:16,446 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 199 predicate places. [2020-10-16 00:01:16,446 INFO L481 AbstractCegarLoop]: Abstraction has has 217 places, 149 transitions, 3217 flow [2020-10-16 00:01:16,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:01:16,446 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:16,446 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:16,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 00:01:16,647 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2146415779, now seen corresponding path program 35 times [2020-10-16 00:01:16,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:16,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743354645] [2020-10-16 00:01:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:16,758 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 00:01:16,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743354645] [2020-10-16 00:01:16,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137630339] [2020-10-16 00:01:16,759 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 00:01:16,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 00:01:16,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:16,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:01:16,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:16,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:16,836 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 00:01:16,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:16,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 00:01:16,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519627541] [2020-10-16 00:01:16,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 00:01:16,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:16,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 00:01:16,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-16 00:01:16,838 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:16,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 149 transitions, 3217 flow. Second operand 15 states. [2020-10-16 00:01:16,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:16,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:16,839 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:17,295 INFO L129 PetriNetUnfolder]: 141/366 cut-off events. [2020-10-16 00:01:17,295 INFO L130 PetriNetUnfolder]: For 26136/26138 co-relation queries the response was YES. [2020-10-16 00:01:17,298 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 00:01:17,301 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 71 selfloop transitions, 92 changer transitions 0/170 dead transitions. [2020-10-16 00:01:17,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 170 transitions, 4473 flow [2020-10-16 00:01:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 00:01:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 00:01:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1281 transitions. [2020-10-16 00:01:17,303 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742105263157895 [2020-10-16 00:01:17,304 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1281 transitions. [2020-10-16 00:01:17,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1281 transitions. [2020-10-16 00:01:17,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:17,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1281 transitions. [2020-10-16 00:01:17,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 00:01:17,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 00:01:17,308 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 00:01:17,308 INFO L185 Difference]: Start difference. First operand has 217 places, 149 transitions, 3217 flow. Second operand 19 states and 1281 transitions. [2020-10-16 00:01:17,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 170 transitions, 4473 flow [2020-10-16 00:01:17,377 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 00:01:17,382 INFO L241 Difference]: Finished difference. Result has 228 places, 155 transitions, 3514 flow [2020-10-16 00:01:17,382 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 00:01:17,382 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 210 predicate places. [2020-10-16 00:01:17,382 INFO L481 AbstractCegarLoop]: Abstraction has has 228 places, 155 transitions, 3514 flow [2020-10-16 00:01:17,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 00:01:17,382 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:17,383 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:17,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 00:01:17,591 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:17,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:17,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1610965881, now seen corresponding path program 36 times [2020-10-16 00:01:17,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:17,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996391512] [2020-10-16 00:01:17,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:17,680 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 00:01:17,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996391512] [2020-10-16 00:01:17,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980213477] [2020-10-16 00:01:17,680 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 00:01:17,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 00:01:17,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:17,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:01:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:17,773 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 00:01:17,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:17,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 00:01:17,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756097542] [2020-10-16 00:01:17,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:01:17,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:17,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:01:17,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:01:17,777 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:17,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 155 transitions, 3514 flow. Second operand 14 states. [2020-10-16 00:01:17,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:17,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:17,778 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:18,391 INFO L129 PetriNetUnfolder]: 145/378 cut-off events. [2020-10-16 00:01:18,391 INFO L130 PetriNetUnfolder]: For 27306/27308 co-relation queries the response was YES. [2020-10-16 00:01:18,398 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 00:01:18,406 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 41 selfloop transitions, 130 changer transitions 0/178 dead transitions. [2020-10-16 00:01:18,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 178 transitions, 4938 flow [2020-10-16 00:01:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 00:01:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 00:01:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1485 transitions. [2020-10-16 00:01:18,411 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:01:18,411 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1485 transitions. [2020-10-16 00:01:18,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1485 transitions. [2020-10-16 00:01:18,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:18,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1485 transitions. [2020-10-16 00:01:18,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 00:01:18,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 00:01:18,419 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 00:01:18,419 INFO L185 Difference]: Start difference. First operand has 228 places, 155 transitions, 3514 flow. Second operand 22 states and 1485 transitions. [2020-10-16 00:01:18,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 178 transitions, 4938 flow [2020-10-16 00:01:18,601 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 00:01:18,609 INFO L241 Difference]: Finished difference. Result has 239 places, 159 transitions, 3758 flow [2020-10-16 00:01:18,610 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 00:01:18,610 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 221 predicate places. [2020-10-16 00:01:18,610 INFO L481 AbstractCegarLoop]: Abstraction has has 239 places, 159 transitions, 3758 flow [2020-10-16 00:01:18,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:01:18,610 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:18,611 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:18,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 00:01:18,823 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:18,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1594878741, now seen corresponding path program 37 times [2020-10-16 00:01:18,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:18,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767448140] [2020-10-16 00:01:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:18,980 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 00:01:18,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767448140] [2020-10-16 00:01:18,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999845613] [2020-10-16 00:01:18,981 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 00:01:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:01:19,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:19,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:19,106 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 00:01:19,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:19,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 00:01:19,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309634744] [2020-10-16 00:01:19,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 00:01:19,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:19,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 00:01:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 00:01:19,110 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:19,110 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 159 transitions, 3758 flow. Second operand 15 states. [2020-10-16 00:01:19,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:19,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:19,111 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:19,716 INFO L129 PetriNetUnfolder]: 149/391 cut-off events. [2020-10-16 00:01:19,716 INFO L130 PetriNetUnfolder]: For 27860/27862 co-relation queries the response was YES. [2020-10-16 00:01:19,719 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 00:01:19,722 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 39 selfloop transitions, 136 changer transitions 0/182 dead transitions. [2020-10-16 00:01:19,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 182 transitions, 5194 flow [2020-10-16 00:01:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 00:01:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 00:01:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1553 transitions. [2020-10-16 00:01:19,729 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752173913043479 [2020-10-16 00:01:19,729 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1553 transitions. [2020-10-16 00:01:19,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1553 transitions. [2020-10-16 00:01:19,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:19,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1553 transitions. [2020-10-16 00:01:19,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 00:01:19,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 00:01:19,737 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 00:01:19,737 INFO L185 Difference]: Start difference. First operand has 239 places, 159 transitions, 3758 flow. Second operand 23 states and 1553 transitions. [2020-10-16 00:01:19,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 182 transitions, 5194 flow [2020-10-16 00:01:19,828 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 00:01:19,832 INFO L241 Difference]: Finished difference. Result has 244 places, 163 transitions, 3902 flow [2020-10-16 00:01:19,832 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 00:01:19,832 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 226 predicate places. [2020-10-16 00:01:19,832 INFO L481 AbstractCegarLoop]: Abstraction has has 244 places, 163 transitions, 3902 flow [2020-10-16 00:01:19,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 00:01:19,832 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:19,832 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:20,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 00:01:20,033 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:20,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1594388631, now seen corresponding path program 38 times [2020-10-16 00:01:20,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:20,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440429334] [2020-10-16 00:01:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:20,125 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 00:01:20,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440429334] [2020-10-16 00:01:20,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785849762] [2020-10-16 00:01:20,126 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 00:01:20,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:01:20,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:20,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:01:20,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:20,186 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 00:01:20,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:20,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 00:01:20,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901550736] [2020-10-16 00:01:20,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:01:20,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:20,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:01:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:01:20,189 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:20,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 163 transitions, 3902 flow. Second operand 14 states. [2020-10-16 00:01:20,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:20,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:20,189 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:20,667 INFO L129 PetriNetUnfolder]: 160/417 cut-off events. [2020-10-16 00:01:20,667 INFO L130 PetriNetUnfolder]: For 30206/30212 co-relation queries the response was YES. [2020-10-16 00:01:20,670 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 00:01:20,674 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 151 changer transitions 0/193 dead transitions. [2020-10-16 00:01:20,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 193 transitions, 5706 flow [2020-10-16 00:01:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 00:01:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 00:01:20,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1622 transitions. [2020-10-16 00:01:20,676 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 00:01:20,676 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1622 transitions. [2020-10-16 00:01:20,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1622 transitions. [2020-10-16 00:01:20,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:20,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1622 transitions. [2020-10-16 00:01:20,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 00:01:20,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 00:01:20,680 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 00:01:20,680 INFO L185 Difference]: Start difference. First operand has 244 places, 163 transitions, 3902 flow. Second operand 24 states and 1622 transitions. [2020-10-16 00:01:20,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 193 transitions, 5706 flow [2020-10-16 00:01:20,786 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 00:01:20,791 INFO L241 Difference]: Finished difference. Result has 251 places, 171 transitions, 4272 flow [2020-10-16 00:01:20,791 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 00:01:20,791 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 233 predicate places. [2020-10-16 00:01:20,791 INFO L481 AbstractCegarLoop]: Abstraction has has 251 places, 171 transitions, 4272 flow [2020-10-16 00:01:20,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:01:20,791 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:20,791 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:20,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 00:01:20,992 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1723642493, now seen corresponding path program 39 times [2020-10-16 00:01:20,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:20,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611286987] [2020-10-16 00:01:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:21,082 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 00:01:21,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611286987] [2020-10-16 00:01:21,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336459854] [2020-10-16 00:01:21,083 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 00:01:21,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 00:01:21,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:21,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:01:21,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:21,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:21,172 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 00:01:21,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:21,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 00:01:21,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000701065] [2020-10-16 00:01:21,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 00:01:21,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 00:01:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 00:01:21,175 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:21,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 171 transitions, 4272 flow. Second operand 15 states. [2020-10-16 00:01:21,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:21,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:21,176 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:21,805 INFO L129 PetriNetUnfolder]: 157/410 cut-off events. [2020-10-16 00:01:21,805 INFO L130 PetriNetUnfolder]: For 33246/33248 co-relation queries the response was YES. [2020-10-16 00:01:21,809 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 00:01:21,817 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 32 selfloop transitions, 154 changer transitions 0/193 dead transitions. [2020-10-16 00:01:21,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 193 transitions, 5810 flow [2020-10-16 00:01:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 00:01:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 00:01:21,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1689 transitions. [2020-10-16 00:01:21,820 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6756 [2020-10-16 00:01:21,820 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1689 transitions. [2020-10-16 00:01:21,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1689 transitions. [2020-10-16 00:01:21,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:21,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1689 transitions. [2020-10-16 00:01:21,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 00:01:21,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 00:01:21,826 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 00:01:21,826 INFO L185 Difference]: Start difference. First operand has 251 places, 171 transitions, 4272 flow. Second operand 25 states and 1689 transitions. [2020-10-16 00:01:21,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 193 transitions, 5810 flow [2020-10-16 00:01:21,979 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 00:01:21,984 INFO L241 Difference]: Finished difference. Result has 259 places, 172 transitions, 4224 flow [2020-10-16 00:01:21,984 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 00:01:21,984 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 241 predicate places. [2020-10-16 00:01:21,984 INFO L481 AbstractCegarLoop]: Abstraction has has 259 places, 172 transitions, 4224 flow [2020-10-16 00:01:21,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 00:01:21,985 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:21,985 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:22,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 00:01:22,197 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:22,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1991622277, now seen corresponding path program 40 times [2020-10-16 00:01:22,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:22,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143432827] [2020-10-16 00:01:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:22,293 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 00:01:22,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143432827] [2020-10-16 00:01:22,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155599576] [2020-10-16 00:01:22,294 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 00:01:22,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:01:22,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:01:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:22,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:01:22,378 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 00:01:22,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:22,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 00:01:22,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875654768] [2020-10-16 00:01:22,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 00:01:22,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:22,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 00:01:22,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 00:01:22,380 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:22,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 172 transitions, 4224 flow. Second operand 15 states. [2020-10-16 00:01:22,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:22,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:22,381 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:22,953 INFO L129 PetriNetUnfolder]: 160/415 cut-off events. [2020-10-16 00:01:22,953 INFO L130 PetriNetUnfolder]: For 35098/35100 co-relation queries the response was YES. [2020-10-16 00:01:22,957 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 00:01:22,964 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 63 selfloop transitions, 126 changer transitions 0/196 dead transitions. [2020-10-16 00:01:22,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 196 transitions, 5838 flow [2020-10-16 00:01:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 00:01:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 00:01:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1621 transitions. [2020-10-16 00:01:22,968 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754166666666667 [2020-10-16 00:01:22,968 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1621 transitions. [2020-10-16 00:01:22,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1621 transitions. [2020-10-16 00:01:22,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:22,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1621 transitions. [2020-10-16 00:01:22,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 00:01:22,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 00:01:22,972 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 00:01:22,972 INFO L185 Difference]: Start difference. First operand has 259 places, 172 transitions, 4224 flow. Second operand 24 states and 1621 transitions. [2020-10-16 00:01:22,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 196 transitions, 5838 flow [2020-10-16 00:01:23,106 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 00:01:23,110 INFO L241 Difference]: Finished difference. Result has 261 places, 175 transitions, 4320 flow [2020-10-16 00:01:23,110 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 00:01:23,110 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 243 predicate places. [2020-10-16 00:01:23,110 INFO L481 AbstractCegarLoop]: Abstraction has has 261 places, 175 transitions, 4320 flow [2020-10-16 00:01:23,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 00:01:23,110 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:23,111 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:23,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 00:01:23,311 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:23,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:23,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1893293424, now seen corresponding path program 41 times [2020-10-16 00:01:23,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:23,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335872974] [2020-10-16 00:01:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:23,409 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 00:01:23,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335872974] [2020-10-16 00:01:23,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760328337] [2020-10-16 00:01:23,410 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 00:01:23,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 00:01:23,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:23,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 00:01:23,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:23,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:01:23,532 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 00:01:23,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:23,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 00:01:23,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316706073] [2020-10-16 00:01:23,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 00:01:23,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:23,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 00:01:23,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-16 00:01:23,535 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:23,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 175 transitions, 4320 flow. Second operand 16 states. [2020-10-16 00:01:23,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:23,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:23,537 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:24,165 INFO L129 PetriNetUnfolder]: 163/423 cut-off events. [2020-10-16 00:01:24,165 INFO L130 PetriNetUnfolder]: For 33867/33869 co-relation queries the response was YES. [2020-10-16 00:01:24,171 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6153 conditions, 423 events. 163/423 cut-off events. For 33867/33869 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2114 event pairs, 0 based on Foata normal form. 1/424 useless extension candidates. Maximal degree in co-relation 6034. Up to 247 conditions per place. [2020-10-16 00:01:24,176 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 158 changer transitions 0/200 dead transitions. [2020-10-16 00:01:24,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 200 transitions, 6018 flow [2020-10-16 00:01:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 00:01:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 00:01:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1621 transitions. [2020-10-16 00:01:24,179 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754166666666667 [2020-10-16 00:01:24,179 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1621 transitions. [2020-10-16 00:01:24,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1621 transitions. [2020-10-16 00:01:24,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:24,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1621 transitions. [2020-10-16 00:01:24,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 00:01:24,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 00:01:24,184 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 00:01:24,184 INFO L185 Difference]: Start difference. First operand has 261 places, 175 transitions, 4320 flow. Second operand 24 states and 1621 transitions. [2020-10-16 00:01:24,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 200 transitions, 6018 flow [2020-10-16 00:01:24,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 200 transitions, 5738 flow, removed 47 selfloop flow, removed 19 redundant places. [2020-10-16 00:01:24,414 INFO L241 Difference]: Finished difference. Result has 267 places, 178 transitions, 4550 flow [2020-10-16 00:01:24,415 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4550, PETRI_PLACES=267, PETRI_TRANSITIONS=178} [2020-10-16 00:01:24,415 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 249 predicate places. [2020-10-16 00:01:24,415 INFO L481 AbstractCegarLoop]: Abstraction has has 267 places, 178 transitions, 4550 flow [2020-10-16 00:01:24,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 00:01:24,416 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:24,416 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:24,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:24,630 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:24,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 42 times [2020-10-16 00:01:24,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:24,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904496014] [2020-10-16 00:01:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:24,799 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 00:01:24,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904496014] [2020-10-16 00:01:24,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380930517] [2020-10-16 00:01:24,800 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 00:01:24,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 00:01:24,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:24,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 00:01:24,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:24,872 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 00:01:24,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:24,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 00:01:24,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496260039] [2020-10-16 00:01:24,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 00:01:24,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:24,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 00:01:24,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 00:01:24,874 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:24,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 178 transitions, 4550 flow. Second operand 15 states. [2020-10-16 00:01:24,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:24,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:24,875 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:25,312 INFO L129 PetriNetUnfolder]: 165/429 cut-off events. [2020-10-16 00:01:25,313 INFO L130 PetriNetUnfolder]: For 37209/37211 co-relation queries the response was YES. [2020-10-16 00:01:25,321 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6417 conditions, 429 events. 165/429 cut-off events. For 37209/37211 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2149 event pairs, 0 based on Foata normal form. 4/433 useless extension candidates. Maximal degree in co-relation 6296. Up to 272 conditions per place. [2020-10-16 00:01:25,330 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 163 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2020-10-16 00:01:25,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 193 transitions, 5752 flow [2020-10-16 00:01:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 00:01:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 00:01:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1076 transitions. [2020-10-16 00:01:25,333 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6725 [2020-10-16 00:01:25,333 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1076 transitions. [2020-10-16 00:01:25,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1076 transitions. [2020-10-16 00:01:25,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:25,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1076 transitions. [2020-10-16 00:01:25,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 00:01:25,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 00:01:25,338 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 00:01:25,338 INFO L185 Difference]: Start difference. First operand has 267 places, 178 transitions, 4550 flow. Second operand 16 states and 1076 transitions. [2020-10-16 00:01:25,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 193 transitions, 5752 flow [2020-10-16 00:01:25,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 193 transitions, 5366 flow, removed 52 selfloop flow, removed 21 redundant places. [2020-10-16 00:01:25,626 INFO L241 Difference]: Finished difference. Result has 263 places, 180 transitions, 4332 flow [2020-10-16 00:01:25,627 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4332, PETRI_PLACES=263, PETRI_TRANSITIONS=180} [2020-10-16 00:01:25,630 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 245 predicate places. [2020-10-16 00:01:25,630 INFO L481 AbstractCegarLoop]: Abstraction has has 263 places, 180 transitions, 4332 flow [2020-10-16 00:01:25,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 00:01:25,630 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:25,630 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:25,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 00:01:25,843 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:25,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:25,844 INFO L82 PathProgramCache]: Analyzing trace with hash -947943161, now seen corresponding path program 43 times [2020-10-16 00:01:25,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:25,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270139700] [2020-10-16 00:01:25,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:25,987 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 00:01:25,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270139700] [2020-10-16 00:01:25,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828340479] [2020-10-16 00:01:25,987 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:26,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 00:01:26,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:26,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:26,104 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 00:01:26,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:26,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 00:01:26,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682942565] [2020-10-16 00:01:26,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 00:01:26,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:26,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 00:01:26,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 00:01:26,106 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:26,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 180 transitions, 4332 flow. Second operand 16 states. [2020-10-16 00:01:26,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:26,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:26,107 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:26,550 INFO L129 PetriNetUnfolder]: 169/441 cut-off events. [2020-10-16 00:01:26,550 INFO L130 PetriNetUnfolder]: For 41099/41101 co-relation queries the response was YES. [2020-10-16 00:01:26,555 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6603 conditions, 441 events. 169/441 cut-off events. For 41099/41101 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2226 event pairs, 0 based on Foata normal form. 4/445 useless extension candidates. Maximal degree in co-relation 6480. Up to 259 conditions per place. [2020-10-16 00:01:26,558 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 132 selfloop transitions, 60 changer transitions 0/199 dead transitions. [2020-10-16 00:01:26,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 199 transitions, 5760 flow [2020-10-16 00:01:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 00:01:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 00:01:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1280 transitions. [2020-10-16 00:01:26,561 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6736842105263158 [2020-10-16 00:01:26,561 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1280 transitions. [2020-10-16 00:01:26,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1280 transitions. [2020-10-16 00:01:26,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:26,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1280 transitions. [2020-10-16 00:01:26,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 00:01:26,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 00:01:26,564 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 00:01:26,564 INFO L185 Difference]: Start difference. First operand has 263 places, 180 transitions, 4332 flow. Second operand 19 states and 1280 transitions. [2020-10-16 00:01:26,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 199 transitions, 5760 flow [2020-10-16 00:01:26,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 199 transitions, 5610 flow, removed 54 selfloop flow, removed 13 redundant places. [2020-10-16 00:01:26,689 INFO L241 Difference]: Finished difference. Result has 270 places, 184 transitions, 4526 flow [2020-10-16 00:01:26,689 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=4200, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4526, PETRI_PLACES=270, PETRI_TRANSITIONS=184} [2020-10-16 00:01:26,689 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 252 predicate places. [2020-10-16 00:01:26,690 INFO L481 AbstractCegarLoop]: Abstraction has has 270 places, 184 transitions, 4526 flow [2020-10-16 00:01:26,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 00:01:26,690 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:26,690 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:26,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:26,891 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:26,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1594171721, now seen corresponding path program 44 times [2020-10-16 00:01:26,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:26,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116027557] [2020-10-16 00:01:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:27,003 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 00:01:27,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116027557] [2020-10-16 00:01:27,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875041177] [2020-10-16 00:01:27,004 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:27,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:01:27,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:27,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 00:01:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:27,077 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 00:01:27,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:27,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 00:01:27,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057486174] [2020-10-16 00:01:27,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 00:01:27,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:27,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 00:01:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 00:01:27,081 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:27,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 184 transitions, 4526 flow. Second operand 15 states. [2020-10-16 00:01:27,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:27,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:27,082 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:27,614 INFO L129 PetriNetUnfolder]: 175/458 cut-off events. [2020-10-16 00:01:27,614 INFO L130 PetriNetUnfolder]: For 44489/44491 co-relation queries the response was YES. [2020-10-16 00:01:27,621 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6985 conditions, 458 events. 175/458 cut-off events. For 44489/44491 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2327 event pairs, 0 based on Foata normal form. 4/462 useless extension candidates. Maximal degree in co-relation 6860. Up to 271 conditions per place. [2020-10-16 00:01:27,626 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 68 selfloop transitions, 138 changer transitions 0/213 dead transitions. [2020-10-16 00:01:27,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 213 transitions, 6441 flow [2020-10-16 00:01:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 00:01:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 00:01:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1755 transitions. [2020-10-16 00:01:27,634 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:01:27,634 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1755 transitions. [2020-10-16 00:01:27,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1755 transitions. [2020-10-16 00:01:27,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:27,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1755 transitions. [2020-10-16 00:01:27,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 00:01:27,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 00:01:27,639 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 00:01:27,639 INFO L185 Difference]: Start difference. First operand has 270 places, 184 transitions, 4526 flow. Second operand 26 states and 1755 transitions. [2020-10-16 00:01:27,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 213 transitions, 6441 flow [2020-10-16 00:01:27,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 213 transitions, 6193 flow, removed 70 selfloop flow, removed 16 redundant places. [2020-10-16 00:01:27,802 INFO L241 Difference]: Finished difference. Result has 283 places, 192 transitions, 4955 flow [2020-10-16 00:01:27,802 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=4326, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4955, PETRI_PLACES=283, PETRI_TRANSITIONS=192} [2020-10-16 00:01:27,803 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 265 predicate places. [2020-10-16 00:01:27,803 INFO L481 AbstractCegarLoop]: Abstraction has has 283 places, 192 transitions, 4955 flow [2020-10-16 00:01:27,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 00:01:27,803 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:27,803 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:28,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 00:01:28,017 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1610748971, now seen corresponding path program 45 times [2020-10-16 00:01:28,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:28,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142366364] [2020-10-16 00:01:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:28,118 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 00:01:28,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142366364] [2020-10-16 00:01:28,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145917695] [2020-10-16 00:01:28,119 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:28,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 00:01:28,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 00:01:28,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:28,195 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 00:01:28,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:28,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 00:01:28,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635707483] [2020-10-16 00:01:28,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 00:01:28,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:28,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 00:01:28,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 00:01:28,197 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:28,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 192 transitions, 4955 flow. Second operand 15 states. [2020-10-16 00:01:28,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:28,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:28,198 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:28,787 INFO L129 PetriNetUnfolder]: 184/480 cut-off events. [2020-10-16 00:01:28,787 INFO L130 PetriNetUnfolder]: For 48919/48925 co-relation queries the response was YES. [2020-10-16 00:01:28,792 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7611 conditions, 480 events. 184/480 cut-off events. For 48919/48925 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2437 event pairs, 0 based on Foata normal form. 8/488 useless extension candidates. Maximal degree in co-relation 7482. Up to 285 conditions per place. [2020-10-16 00:01:28,796 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 57 selfloop transitions, 158 changer transitions 0/222 dead transitions. [2020-10-16 00:01:28,796 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 222 transitions, 7145 flow [2020-10-16 00:01:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 00:01:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 00:01:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1892 transitions. [2020-10-16 00:01:28,798 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757142857142857 [2020-10-16 00:01:28,798 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1892 transitions. [2020-10-16 00:01:28,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1892 transitions. [2020-10-16 00:01:28,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:28,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1892 transitions. [2020-10-16 00:01:28,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-16 00:01:28,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-16 00:01:28,801 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-16 00:01:28,801 INFO L185 Difference]: Start difference. First operand has 283 places, 192 transitions, 4955 flow. Second operand 28 states and 1892 transitions. [2020-10-16 00:01:28,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 222 transitions, 7145 flow [2020-10-16 00:01:28,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 222 transitions, 6739 flow, removed 97 selfloop flow, removed 20 redundant places. [2020-10-16 00:01:28,934 INFO L241 Difference]: Finished difference. Result has 294 places, 198 transitions, 5298 flow [2020-10-16 00:01:28,935 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5298, PETRI_PLACES=294, PETRI_TRANSITIONS=198} [2020-10-16 00:01:28,935 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 276 predicate places. [2020-10-16 00:01:28,935 INFO L481 AbstractCegarLoop]: Abstraction has has 294 places, 198 transitions, 5298 flow [2020-10-16 00:01:28,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 00:01:28,935 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:28,935 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:29,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:29,142 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:29,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1610765711, now seen corresponding path program 46 times [2020-10-16 00:01:29,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:29,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386128721] [2020-10-16 00:01:29,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:29,251 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 00:01:29,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386128721] [2020-10-16 00:01:29,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774579349] [2020-10-16 00:01:29,251 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:29,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:01:29,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:29,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 00:01:29,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:29,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:29,330 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 00:01:29,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:29,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 00:01:29,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038948203] [2020-10-16 00:01:29,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 00:01:29,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:29,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 00:01:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 00:01:29,332 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:29,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 198 transitions, 5298 flow. Second operand 16 states. [2020-10-16 00:01:29,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:29,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:29,333 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:30,029 INFO L129 PetriNetUnfolder]: 181/473 cut-off events. [2020-10-16 00:01:30,029 INFO L130 PetriNetUnfolder]: For 54557/54559 co-relation queries the response was YES. [2020-10-16 00:01:30,034 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7752 conditions, 473 events. 181/473 cut-off events. For 54557/54559 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2419 event pairs, 0 based on Foata normal form. 4/477 useless extension candidates. Maximal degree in co-relation 7619. Up to 279 conditions per place. [2020-10-16 00:01:30,038 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 57 selfloop transitions, 158 changer transitions 0/222 dead transitions. [2020-10-16 00:01:30,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 222 transitions, 7250 flow [2020-10-16 00:01:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 00:01:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-16 00:01:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1824 transitions. [2020-10-16 00:01:30,040 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2020-10-16 00:01:30,040 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1824 transitions. [2020-10-16 00:01:30,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1824 transitions. [2020-10-16 00:01:30,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:30,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1824 transitions. [2020-10-16 00:01:30,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-16 00:01:30,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-16 00:01:30,043 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-16 00:01:30,044 INFO L185 Difference]: Start difference. First operand has 294 places, 198 transitions, 5298 flow. Second operand 27 states and 1824 transitions. [2020-10-16 00:01:30,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 222 transitions, 7250 flow [2020-10-16 00:01:30,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 222 transitions, 6707 flow, removed 147 selfloop flow, removed 22 redundant places. [2020-10-16 00:01:30,186 INFO L241 Difference]: Finished difference. Result has 300 places, 199 transitions, 5224 flow [2020-10-16 00:01:30,187 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5224, PETRI_PLACES=300, PETRI_TRANSITIONS=199} [2020-10-16 00:01:30,187 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 282 predicate places. [2020-10-16 00:01:30,187 INFO L481 AbstractCegarLoop]: Abstraction has has 300 places, 199 transitions, 5224 flow [2020-10-16 00:01:30,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 00:01:30,188 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:30,188 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:30,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 00:01:30,399 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1746167786, now seen corresponding path program 47 times [2020-10-16 00:01:30,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:30,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574067427] [2020-10-16 00:01:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:30,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574067427] [2020-10-16 00:01:30,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154012128] [2020-10-16 00:01:30,565 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:30,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 00:01:30,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:30,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 00:01:30,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:30,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:30,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 00:01:30,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992783805] [2020-10-16 00:01:30,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 00:01:30,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:30,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 00:01:30,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 00:01:30,675 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:30,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 199 transitions, 5224 flow. Second operand 16 states. [2020-10-16 00:01:30,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:30,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:30,676 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:31,032 INFO L129 PetriNetUnfolder]: 183/479 cut-off events. [2020-10-16 00:01:31,032 INFO L130 PetriNetUnfolder]: For 55132/55138 co-relation queries the response was YES. [2020-10-16 00:01:31,037 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7813 conditions, 479 events. 183/479 cut-off events. For 55132/55138 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2442 event pairs, 0 based on Foata normal form. 5/484 useless extension candidates. Maximal degree in co-relation 7678. Up to 281 conditions per place. [2020-10-16 00:01:31,041 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 159 selfloop transitions, 50 changer transitions 0/216 dead transitions. [2020-10-16 00:01:31,042 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 216 transitions, 6708 flow [2020-10-16 00:01:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 00:01:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-16 00:01:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1211 transitions. [2020-10-16 00:01:31,043 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6727777777777778 [2020-10-16 00:01:31,043 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1211 transitions. [2020-10-16 00:01:31,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1211 transitions. [2020-10-16 00:01:31,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:31,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1211 transitions. [2020-10-16 00:01:31,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-16 00:01:31,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-16 00:01:31,045 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-16 00:01:31,045 INFO L185 Difference]: Start difference. First operand has 300 places, 199 transitions, 5224 flow. Second operand 18 states and 1211 transitions. [2020-10-16 00:01:31,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 216 transitions, 6708 flow [2020-10-16 00:01:31,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 216 transitions, 6340 flow, removed 56 selfloop flow, removed 23 redundant places. [2020-10-16 00:01:31,186 INFO L241 Difference]: Finished difference. Result has 296 places, 201 transitions, 5142 flow [2020-10-16 00:01:31,186 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=4906, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5142, PETRI_PLACES=296, PETRI_TRANSITIONS=201} [2020-10-16 00:01:31,187 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 278 predicate places. [2020-10-16 00:01:31,187 INFO L481 AbstractCegarLoop]: Abstraction has has 296 places, 201 transitions, 5142 flow [2020-10-16 00:01:31,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 00:01:31,187 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:31,187 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:31,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 00:01:31,388 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:31,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:31,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1446248666, now seen corresponding path program 48 times [2020-10-16 00:01:31,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:31,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628478110] [2020-10-16 00:01:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:31,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628478110] [2020-10-16 00:01:31,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175226533] [2020-10-16 00:01:31,522 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:31,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 00:01:31,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 00:01:31,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:31,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:31,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:31,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 00:01:31,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609642419] [2020-10-16 00:01:31,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 00:01:31,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:31,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 00:01:31,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 00:01:31,604 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:31,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 201 transitions, 5142 flow. Second operand 17 states. [2020-10-16 00:01:31,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:31,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:31,605 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:32,153 INFO L129 PetriNetUnfolder]: 185/485 cut-off events. [2020-10-16 00:01:32,154 INFO L130 PetriNetUnfolder]: For 54213/54215 co-relation queries the response was YES. [2020-10-16 00:01:32,158 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7778 conditions, 485 events. 185/485 cut-off events. For 54213/54215 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2491 event pairs, 0 based on Foata normal form. 4/489 useless extension candidates. Maximal degree in co-relation 7641. Up to 285 conditions per place. [2020-10-16 00:01:32,163 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 111 selfloop transitions, 102 changer transitions 0/220 dead transitions. [2020-10-16 00:01:32,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 220 transitions, 6742 flow [2020-10-16 00:01:32,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 00:01:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 00:01:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1415 transitions. [2020-10-16 00:01:32,165 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6738095238095239 [2020-10-16 00:01:32,165 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1415 transitions. [2020-10-16 00:01:32,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1415 transitions. [2020-10-16 00:01:32,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:32,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1415 transitions. [2020-10-16 00:01:32,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 00:01:32,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 00:01:32,167 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 00:01:32,167 INFO L185 Difference]: Start difference. First operand has 296 places, 201 transitions, 5142 flow. Second operand 21 states and 1415 transitions. [2020-10-16 00:01:32,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 220 transitions, 6742 flow [2020-10-16 00:01:32,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 220 transitions, 6538 flow, removed 56 selfloop flow, removed 15 redundant places. [2020-10-16 00:01:32,302 INFO L241 Difference]: Finished difference. Result has 303 places, 203 transitions, 5306 flow [2020-10-16 00:01:32,302 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=4956, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5306, PETRI_PLACES=303, PETRI_TRANSITIONS=203} [2020-10-16 00:01:32,302 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 285 predicate places. [2020-10-16 00:01:32,302 INFO L481 AbstractCegarLoop]: Abstraction has has 303 places, 203 transitions, 5306 flow [2020-10-16 00:01:32,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 00:01:32,302 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:32,302 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:32,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 00:01:32,503 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:32,504 INFO L82 PathProgramCache]: Analyzing trace with hash 169943844, now seen corresponding path program 49 times [2020-10-16 00:01:32,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:32,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956933318] [2020-10-16 00:01:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:32,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956933318] [2020-10-16 00:01:32,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714742827] [2020-10-16 00:01:32,634 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 00:01:32,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:32,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:32,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 00:01:32,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835388855] [2020-10-16 00:01:32,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 00:01:32,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:32,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 00:01:32,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 00:01:32,706 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:32,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 203 transitions, 5306 flow. Second operand 16 states. [2020-10-16 00:01:32,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:32,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:32,707 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:33,198 INFO L129 PetriNetUnfolder]: 197/521 cut-off events. [2020-10-16 00:01:33,198 INFO L130 PetriNetUnfolder]: For 60492/60498 co-relation queries the response was YES. [2020-10-16 00:01:33,204 INFO L80 FinitePrefix]: Finished finitePrefix Result has 8506 conditions, 521 events. 197/521 cut-off events. For 60492/60498 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2755 event pairs, 0 based on Foata normal form. 5/526 useless extension candidates. Maximal degree in co-relation 8367. Up to 309 conditions per place. [2020-10-16 00:01:33,208 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 98 selfloop transitions, 130 changer transitions 0/235 dead transitions. [2020-10-16 00:01:33,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 235 transitions, 7435 flow [2020-10-16 00:01:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 00:01:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 00:01:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1483 transitions. [2020-10-16 00:01:33,212 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6740909090909091 [2020-10-16 00:01:33,212 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1483 transitions. [2020-10-16 00:01:33,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1483 transitions. [2020-10-16 00:01:33,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:33,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1483 transitions. [2020-10-16 00:01:33,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 00:01:33,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 00:01:33,216 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 00:01:33,216 INFO L185 Difference]: Start difference. First operand has 303 places, 203 transitions, 5306 flow. Second operand 22 states and 1483 transitions. [2020-10-16 00:01:33,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 235 transitions, 7435 flow [2020-10-16 00:01:33,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 235 transitions, 7123 flow, removed 71 selfloop flow, removed 17 redundant places. [2020-10-16 00:01:33,424 INFO L241 Difference]: Finished difference. Result has 315 places, 216 transitions, 5917 flow [2020-10-16 00:01:33,424 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=5038, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5917, PETRI_PLACES=315, PETRI_TRANSITIONS=216} [2020-10-16 00:01:33,424 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 297 predicate places. [2020-10-16 00:01:33,424 INFO L481 AbstractCegarLoop]: Abstraction has has 315 places, 216 transitions, 5917 flow [2020-10-16 00:01:33,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 00:01:33,425 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:33,425 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:33,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-16 00:01:33,625 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:33,626 INFO L82 PathProgramCache]: Analyzing trace with hash 689686920, now seen corresponding path program 50 times [2020-10-16 00:01:33,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:33,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730841064] [2020-10-16 00:01:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:33,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730841064] [2020-10-16 00:01:33,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18538158] [2020-10-16 00:01:33,768 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:33,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:01:33,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:33,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 00:01:33,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:33,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:33,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:33,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 00:01:33,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717569392] [2020-10-16 00:01:33,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 00:01:33,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:33,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 00:01:33,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 00:01:33,857 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:33,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 216 transitions, 5917 flow. Second operand 17 states. [2020-10-16 00:01:33,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:33,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:33,859 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:34,485 INFO L129 PetriNetUnfolder]: 205/545 cut-off events. [2020-10-16 00:01:34,485 INFO L130 PetriNetUnfolder]: For 65482/65488 co-relation queries the response was YES. [2020-10-16 00:01:34,520 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9086 conditions, 545 events. 205/545 cut-off events. For 65482/65488 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2925 event pairs, 0 based on Foata normal form. 8/553 useless extension candidates. Maximal degree in co-relation 8939. Up to 325 conditions per place. [2020-10-16 00:01:34,525 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 92 selfloop transitions, 144 changer transitions 0/243 dead transitions. [2020-10-16 00:01:34,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 243 transitions, 7917 flow [2020-10-16 00:01:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 00:01:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 00:01:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1551 transitions. [2020-10-16 00:01:34,527 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743478260869565 [2020-10-16 00:01:34,527 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1551 transitions. [2020-10-16 00:01:34,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1551 transitions. [2020-10-16 00:01:34,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:34,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1551 transitions. [2020-10-16 00:01:34,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 00:01:34,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 00:01:34,531 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 00:01:34,531 INFO L185 Difference]: Start difference. First operand has 315 places, 216 transitions, 5917 flow. Second operand 23 states and 1551 transitions. [2020-10-16 00:01:34,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 243 transitions, 7917 flow [2020-10-16 00:01:34,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 243 transitions, 7567 flow, removed 97 selfloop flow, removed 13 redundant places. [2020-10-16 00:01:34,717 INFO L241 Difference]: Finished difference. Result has 328 places, 224 transitions, 6279 flow [2020-10-16 00:01:34,718 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=5593, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6279, PETRI_PLACES=328, PETRI_TRANSITIONS=224} [2020-10-16 00:01:34,718 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 310 predicate places. [2020-10-16 00:01:34,718 INFO L481 AbstractCegarLoop]: Abstraction has has 328 places, 224 transitions, 6279 flow [2020-10-16 00:01:34,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 00:01:34,718 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:34,718 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:34,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:34,919 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:34,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:34,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1624966084, now seen corresponding path program 51 times [2020-10-16 00:01:34,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:34,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407746191] [2020-10-16 00:01:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:35,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407746191] [2020-10-16 00:01:35,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214193099] [2020-10-16 00:01:35,045 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:35,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 00:01:35,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:35,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 00:01:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:35,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:35,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 00:01:35,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832568923] [2020-10-16 00:01:35,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 00:01:35,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:35,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 00:01:35,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 00:01:35,131 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:35,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 224 transitions, 6279 flow. Second operand 16 states. [2020-10-16 00:01:35,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:35,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:35,132 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:35,744 INFO L129 PetriNetUnfolder]: 209/556 cut-off events. [2020-10-16 00:01:35,744 INFO L130 PetriNetUnfolder]: For 68666/68668 co-relation queries the response was YES. [2020-10-16 00:01:35,750 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9419 conditions, 556 events. 209/556 cut-off events. For 68666/68668 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2993 event pairs, 0 based on Foata normal form. 2/558 useless extension candidates. Maximal degree in co-relation 9268. Up to 331 conditions per place. [2020-10-16 00:01:35,755 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 74 selfloop transitions, 168 changer transitions 0/249 dead transitions. [2020-10-16 00:01:35,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 249 transitions, 8310 flow [2020-10-16 00:01:35,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 00:01:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 00:01:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1619 transitions. [2020-10-16 00:01:35,757 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745833333333333 [2020-10-16 00:01:35,757 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1619 transitions. [2020-10-16 00:01:35,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1619 transitions. [2020-10-16 00:01:35,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:35,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1619 transitions. [2020-10-16 00:01:35,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 00:01:35,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 00:01:35,760 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 00:01:35,760 INFO L185 Difference]: Start difference. First operand has 328 places, 224 transitions, 6279 flow. Second operand 24 states and 1619 transitions. [2020-10-16 00:01:35,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 249 transitions, 8310 flow [2020-10-16 00:01:35,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 249 transitions, 7900 flow, removed 95 selfloop flow, removed 18 redundant places. [2020-10-16 00:01:35,964 INFO L241 Difference]: Finished difference. Result has 335 places, 228 transitions, 6506 flow [2020-10-16 00:01:35,964 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=5941, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=6506, PETRI_PLACES=335, PETRI_TRANSITIONS=228} [2020-10-16 00:01:35,965 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 317 predicate places. [2020-10-16 00:01:35,965 INFO L481 AbstractCegarLoop]: Abstraction has has 335 places, 228 transitions, 6506 flow [2020-10-16 00:01:35,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 00:01:35,965 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:35,965 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:36,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:36,166 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:36,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1112460206, now seen corresponding path program 52 times [2020-10-16 00:01:36,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:36,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142379186] [2020-10-16 00:01:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:36,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142379186] [2020-10-16 00:01:36,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025004103] [2020-10-16 00:01:36,292 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:36,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:01:36,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:36,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 00:01:36,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:36,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:36,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:36,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 00:01:36,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44450813] [2020-10-16 00:01:36,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 00:01:36,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:36,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 00:01:36,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 00:01:36,381 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:36,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 228 transitions, 6506 flow. Second operand 17 states. [2020-10-16 00:01:36,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:36,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:36,382 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:37,249 INFO L129 PetriNetUnfolder]: 213/566 cut-off events. [2020-10-16 00:01:37,249 INFO L130 PetriNetUnfolder]: For 67902/67904 co-relation queries the response was YES. [2020-10-16 00:01:37,255 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9593 conditions, 566 events. 213/566 cut-off events. For 67902/67904 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3066 event pairs, 0 based on Foata normal form. 4/570 useless extension candidates. Maximal degree in co-relation 9440. Up to 337 conditions per place. [2020-10-16 00:01:37,260 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 40 selfloop transitions, 210 changer transitions 0/257 dead transitions. [2020-10-16 00:01:37,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 257 transitions, 8834 flow [2020-10-16 00:01:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 00:01:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-16 00:01:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1959 transitions. [2020-10-16 00:01:37,263 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755172413793104 [2020-10-16 00:01:37,263 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1959 transitions. [2020-10-16 00:01:37,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1959 transitions. [2020-10-16 00:01:37,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:37,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1959 transitions. [2020-10-16 00:01:37,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-16 00:01:37,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-16 00:01:37,267 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-16 00:01:37,267 INFO L185 Difference]: Start difference. First operand has 335 places, 228 transitions, 6506 flow. Second operand 29 states and 1959 transitions. [2020-10-16 00:01:37,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 257 transitions, 8834 flow [2020-10-16 00:01:37,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 257 transitions, 8378 flow, removed 80 selfloop flow, removed 21 redundant places. [2020-10-16 00:01:37,509 INFO L241 Difference]: Finished difference. Result has 345 places, 232 transitions, 6832 flow [2020-10-16 00:01:37,510 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6832, PETRI_PLACES=345, PETRI_TRANSITIONS=232} [2020-10-16 00:01:37,510 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 327 predicate places. [2020-10-16 00:01:37,510 INFO L481 AbstractCegarLoop]: Abstraction has has 345 places, 232 transitions, 6832 flow [2020-10-16 00:01:37,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 00:01:37,510 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:37,510 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:37,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 00:01:37,723 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:37,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:37,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1605854204, now seen corresponding path program 53 times [2020-10-16 00:01:37,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:37,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631857891] [2020-10-16 00:01:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:37,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631857891] [2020-10-16 00:01:37,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906225721] [2020-10-16 00:01:37,838 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:37,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 00:01:37,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:37,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 00:01:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:37,920 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:01:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:37,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:37,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 00:01:37,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229387618] [2020-10-16 00:01:37,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 00:01:37,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:37,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 00:01:37,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 00:01:37,938 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:37,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 232 transitions, 6832 flow. Second operand 17 states. [2020-10-16 00:01:37,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:37,939 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:37,939 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:38,731 INFO L129 PetriNetUnfolder]: 216/571 cut-off events. [2020-10-16 00:01:38,731 INFO L130 PetriNetUnfolder]: For 70409/70411 co-relation queries the response was YES. [2020-10-16 00:01:38,738 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9897 conditions, 571 events. 216/571 cut-off events. For 70409/70411 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3090 event pairs, 0 based on Foata normal form. 3/574 useless extension candidates. Maximal degree in co-relation 9741. Up to 341 conditions per place. [2020-10-16 00:01:38,743 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 74 selfloop transitions, 178 changer transitions 0/259 dead transitions. [2020-10-16 00:01:38,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 259 transitions, 9078 flow [2020-10-16 00:01:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 00:01:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 00:01:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1891 transitions. [2020-10-16 00:01:38,746 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753571428571429 [2020-10-16 00:01:38,746 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1891 transitions. [2020-10-16 00:01:38,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1891 transitions. [2020-10-16 00:01:38,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:38,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1891 transitions. [2020-10-16 00:01:38,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-16 00:01:38,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-16 00:01:38,751 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-16 00:01:38,751 INFO L185 Difference]: Start difference. First operand has 345 places, 232 transitions, 6832 flow. Second operand 28 states and 1891 transitions. [2020-10-16 00:01:38,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 259 transitions, 9078 flow [2020-10-16 00:01:39,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 259 transitions, 8530 flow, removed 98 selfloop flow, removed 25 redundant places. [2020-10-16 00:01:39,007 INFO L241 Difference]: Finished difference. Result has 349 places, 235 transitions, 6896 flow [2020-10-16 00:01:39,008 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=6312, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6896, PETRI_PLACES=349, PETRI_TRANSITIONS=235} [2020-10-16 00:01:39,008 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 331 predicate places. [2020-10-16 00:01:39,008 INFO L481 AbstractCegarLoop]: Abstraction has has 349 places, 235 transitions, 6896 flow [2020-10-16 00:01:39,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 00:01:39,008 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:39,008 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:39,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:39,209 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:39,209 INFO L82 PathProgramCache]: Analyzing trace with hash 126544325, now seen corresponding path program 54 times [2020-10-16 00:01:39,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:39,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130515821] [2020-10-16 00:01:39,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:39,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130515821] [2020-10-16 00:01:39,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359301001] [2020-10-16 00:01:39,344 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:39,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 00:01:39,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:39,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 00:01:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:39,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:01:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:39,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:39,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 00:01:39,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407476593] [2020-10-16 00:01:39,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 00:01:39,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:39,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 00:01:39,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-16 00:01:39,441 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:39,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 235 transitions, 6896 flow. Second operand 18 states. [2020-10-16 00:01:39,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:39,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:39,442 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:40,341 INFO L129 PetriNetUnfolder]: 219/579 cut-off events. [2020-10-16 00:01:40,341 INFO L130 PetriNetUnfolder]: For 73304/73306 co-relation queries the response was YES. [2020-10-16 00:01:40,348 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 579 events. 219/579 cut-off events. For 73304/73306 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3099 event pairs, 0 based on Foata normal form. 1/580 useless extension candidates. Maximal degree in co-relation 9925. Up to 345 conditions per place. [2020-10-16 00:01:40,354 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 43 selfloop transitions, 214 changer transitions 0/264 dead transitions. [2020-10-16 00:01:40,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 264 transitions, 9306 flow [2020-10-16 00:01:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 00:01:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 00:01:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1891 transitions. [2020-10-16 00:01:40,356 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753571428571429 [2020-10-16 00:01:40,356 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1891 transitions. [2020-10-16 00:01:40,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1891 transitions. [2020-10-16 00:01:40,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:40,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1891 transitions. [2020-10-16 00:01:40,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-16 00:01:40,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-16 00:01:40,359 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-16 00:01:40,359 INFO L185 Difference]: Start difference. First operand has 349 places, 235 transitions, 6896 flow. Second operand 28 states and 1891 transitions. [2020-10-16 00:01:40,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 264 transitions, 9306 flow [2020-10-16 00:01:40,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 264 transitions, 8838 flow, removed 77 selfloop flow, removed 25 redundant places. [2020-10-16 00:01:40,688 INFO L241 Difference]: Finished difference. Result has 353 places, 238 transitions, 7118 flow [2020-10-16 00:01:40,689 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=6456, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7118, PETRI_PLACES=353, PETRI_TRANSITIONS=238} [2020-10-16 00:01:40,689 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 335 predicate places. [2020-10-16 00:01:40,689 INFO L481 AbstractCegarLoop]: Abstraction has has 353 places, 238 transitions, 7118 flow [2020-10-16 00:01:40,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 00:01:40,689 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:40,689 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:40,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 00:01:40,903 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:40,903 INFO L82 PathProgramCache]: Analyzing trace with hash 935082962, now seen corresponding path program 55 times [2020-10-16 00:01:40,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:40,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769101418] [2020-10-16 00:01:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:41,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769101418] [2020-10-16 00:01:41,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027794035] [2020-10-16 00:01:41,103 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 00:01:41,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:41,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:41,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 00:01:41,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539684002] [2020-10-16 00:01:41,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 00:01:41,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:41,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 00:01:41,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 00:01:41,185 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:41,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 238 transitions, 7118 flow. Second operand 17 states. [2020-10-16 00:01:41,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:41,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:41,187 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:41,727 INFO L129 PetriNetUnfolder]: 221/585 cut-off events. [2020-10-16 00:01:41,728 INFO L130 PetriNetUnfolder]: For 76678/76684 co-relation queries the response was YES. [2020-10-16 00:01:41,736 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10292 conditions, 585 events. 221/585 cut-off events. For 76678/76684 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3157 event pairs, 0 based on Foata normal form. 8/593 useless extension candidates. Maximal degree in co-relation 10132. Up to 376 conditions per place. [2020-10-16 00:01:41,742 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 223 selfloop transitions, 25 changer transitions 0/255 dead transitions. [2020-10-16 00:01:41,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 255 transitions, 8760 flow [2020-10-16 00:01:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 00:01:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-16 00:01:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1210 transitions. [2020-10-16 00:01:41,744 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2020-10-16 00:01:41,744 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1210 transitions. [2020-10-16 00:01:41,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1210 transitions. [2020-10-16 00:01:41,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:41,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1210 transitions. [2020-10-16 00:01:41,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-16 00:01:41,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-16 00:01:41,746 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-16 00:01:41,746 INFO L185 Difference]: Start difference. First operand has 353 places, 238 transitions, 7118 flow. Second operand 18 states and 1210 transitions. [2020-10-16 00:01:41,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 255 transitions, 8760 flow [2020-10-16 00:01:41,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 255 transitions, 8238 flow, removed 66 selfloop flow, removed 25 redundant places. [2020-10-16 00:01:41,999 INFO L241 Difference]: Finished difference. Result has 347 places, 240 transitions, 6792 flow [2020-10-16 00:01:41,999 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=6596, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6792, PETRI_PLACES=347, PETRI_TRANSITIONS=240} [2020-10-16 00:01:41,999 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 329 predicate places. [2020-10-16 00:01:41,999 INFO L481 AbstractCegarLoop]: Abstraction has has 347 places, 240 transitions, 6792 flow [2020-10-16 00:01:41,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 00:01:41,999 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:41,999 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:42,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 00:01:42,200 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 56 times [2020-10-16 00:01:42,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:42,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814101180] [2020-10-16 00:01:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:42,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814101180] [2020-10-16 00:01:42,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890457537] [2020-10-16 00:01:42,364 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:42,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:01:42,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 00:01:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:42,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:42,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:42,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 00:01:42,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964625229] [2020-10-16 00:01:42,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 00:01:42,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:42,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 00:01:42,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 00:01:42,445 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:42,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 240 transitions, 6792 flow. Second operand 18 states. [2020-10-16 00:01:42,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:42,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:42,446 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:43,053 INFO L129 PetriNetUnfolder]: 225/596 cut-off events. [2020-10-16 00:01:43,054 INFO L130 PetriNetUnfolder]: For 82999/83001 co-relation queries the response was YES. [2020-10-16 00:01:43,060 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10505 conditions, 596 events. 225/596 cut-off events. For 82999/83001 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3227 event pairs, 0 based on Foata normal form. 4/600 useless extension candidates. Maximal degree in co-relation 10343. Up to 357 conditions per place. [2020-10-16 00:01:43,067 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 188 selfloop transitions, 66 changer transitions 0/261 dead transitions. [2020-10-16 00:01:43,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 261 transitions, 8705 flow [2020-10-16 00:01:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 00:01:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 00:01:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1414 transitions. [2020-10-16 00:01:43,069 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2020-10-16 00:01:43,069 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1414 transitions. [2020-10-16 00:01:43,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1414 transitions. [2020-10-16 00:01:43,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:43,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1414 transitions. [2020-10-16 00:01:43,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 00:01:43,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 00:01:43,071 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 00:01:43,071 INFO L185 Difference]: Start difference. First operand has 347 places, 240 transitions, 6792 flow. Second operand 21 states and 1414 transitions. [2020-10-16 00:01:43,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 261 transitions, 8705 flow [2020-10-16 00:01:43,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 261 transitions, 8529 flow, removed 65 selfloop flow, removed 15 redundant places. [2020-10-16 00:01:43,311 INFO L241 Difference]: Finished difference. Result has 354 places, 244 transitions, 7015 flow [2020-10-16 00:01:43,311 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=6636, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7015, PETRI_PLACES=354, PETRI_TRANSITIONS=244} [2020-10-16 00:01:43,311 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 336 predicate places. [2020-10-16 00:01:43,311 INFO L481 AbstractCegarLoop]: Abstraction has has 354 places, 244 transitions, 7015 flow [2020-10-16 00:01:43,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 00:01:43,312 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:43,312 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:43,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 00:01:43,512 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:43,513 INFO L82 PathProgramCache]: Analyzing trace with hash -800564376, now seen corresponding path program 57 times [2020-10-16 00:01:43,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:43,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076067036] [2020-10-16 00:01:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:43,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076067036] [2020-10-16 00:01:43,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474640568] [2020-10-16 00:01:43,673 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:43,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 00:01:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:43,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 00:01:43,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:43,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:43,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:43,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 00:01:43,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562677074] [2020-10-16 00:01:43,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 00:01:43,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:43,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 00:01:43,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 00:01:43,759 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:43,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 244 transitions, 7015 flow. Second operand 18 states. [2020-10-16 00:01:43,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:43,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:43,760 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:44,432 INFO L129 PetriNetUnfolder]: 229/607 cut-off events. [2020-10-16 00:01:44,432 INFO L130 PetriNetUnfolder]: For 87232/87234 co-relation queries the response was YES. [2020-10-16 00:01:44,440 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10874 conditions, 607 events. 229/607 cut-off events. For 87232/87234 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3255 event pairs, 0 based on Foata normal form. 4/611 useless extension candidates. Maximal degree in co-relation 10710. Up to 365 conditions per place. [2020-10-16 00:01:44,446 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 146 selfloop transitions, 114 changer transitions 0/267 dead transitions. [2020-10-16 00:01:44,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 267 transitions, 9094 flow [2020-10-16 00:01:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 00:01:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 00:01:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1550 transitions. [2020-10-16 00:01:44,448 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2020-10-16 00:01:44,448 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1550 transitions. [2020-10-16 00:01:44,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1550 transitions. [2020-10-16 00:01:44,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:44,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1550 transitions. [2020-10-16 00:01:44,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 00:01:44,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 00:01:44,451 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 00:01:44,451 INFO L185 Difference]: Start difference. First operand has 354 places, 244 transitions, 7015 flow. Second operand 23 states and 1550 transitions. [2020-10-16 00:01:44,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 267 transitions, 9094 flow [2020-10-16 00:01:44,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 267 transitions, 8838 flow, removed 77 selfloop flow, removed 16 redundant places. [2020-10-16 00:01:44,701 INFO L241 Difference]: Finished difference. Result has 362 places, 248 transitions, 7285 flow [2020-10-16 00:01:44,701 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=6801, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7285, PETRI_PLACES=362, PETRI_TRANSITIONS=248} [2020-10-16 00:01:44,702 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 344 predicate places. [2020-10-16 00:01:44,702 INFO L481 AbstractCegarLoop]: Abstraction has has 362 places, 248 transitions, 7285 flow [2020-10-16 00:01:44,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 00:01:44,702 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:44,702 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:44,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 00:01:44,916 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:44,916 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 58 times [2020-10-16 00:01:44,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:44,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982827442] [2020-10-16 00:01:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:45,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982827442] [2020-10-16 00:01:45,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68110388] [2020-10-16 00:01:45,047 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:45,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:01:45,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 00:01:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:45,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:45,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:45,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 00:01:45,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327150273] [2020-10-16 00:01:45,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 00:01:45,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:45,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 00:01:45,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 00:01:45,143 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:45,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 248 transitions, 7285 flow. Second operand 18 states. [2020-10-16 00:01:45,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:45,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:45,144 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:46,107 INFO L129 PetriNetUnfolder]: 233/617 cut-off events. [2020-10-16 00:01:46,108 INFO L130 PetriNetUnfolder]: For 88851/88857 co-relation queries the response was YES. [2020-10-16 00:01:46,116 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11145 conditions, 617 events. 233/617 cut-off events. For 88851/88857 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3357 event pairs, 0 based on Foata normal form. 8/625 useless extension candidates. Maximal degree in co-relation 10979. Up to 371 conditions per place. [2020-10-16 00:01:46,122 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 62 selfloop transitions, 210 changer transitions 0/279 dead transitions. [2020-10-16 00:01:46,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 279 transitions, 9979 flow [2020-10-16 00:01:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 00:01:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 00:01:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2094 transitions. [2020-10-16 00:01:46,124 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675483870967742 [2020-10-16 00:01:46,125 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2094 transitions. [2020-10-16 00:01:46,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2094 transitions. [2020-10-16 00:01:46,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:46,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2094 transitions. [2020-10-16 00:01:46,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 00:01:46,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 00:01:46,128 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 00:01:46,128 INFO L185 Difference]: Start difference. First operand has 362 places, 248 transitions, 7285 flow. Second operand 31 states and 2094 transitions. [2020-10-16 00:01:46,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 279 transitions, 9979 flow [2020-10-16 00:01:46,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 279 transitions, 9694 flow, removed 88 selfloop flow, removed 14 redundant places. [2020-10-16 00:01:46,489 INFO L241 Difference]: Finished difference. Result has 381 places, 252 transitions, 7808 flow [2020-10-16 00:01:46,489 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7808, PETRI_PLACES=381, PETRI_TRANSITIONS=252} [2020-10-16 00:01:46,490 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 363 predicate places. [2020-10-16 00:01:46,490 INFO L481 AbstractCegarLoop]: Abstraction has has 381 places, 252 transitions, 7808 flow [2020-10-16 00:01:46,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 00:01:46,490 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:46,490 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:46,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 00:01:46,703 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash -226750371, now seen corresponding path program 59 times [2020-10-16 00:01:46,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:46,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401278786] [2020-10-16 00:01:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:46,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401278786] [2020-10-16 00:01:46,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469036742] [2020-10-16 00:01:46,893 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:46,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 00:01:46,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:46,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 00:01:46,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:46,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:46,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 00:01:46,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784028630] [2020-10-16 00:01:46,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 00:01:46,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:46,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 00:01:46,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 00:01:46,962 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:46,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 252 transitions, 7808 flow. Second operand 18 states. [2020-10-16 00:01:46,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:46,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:46,963 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:47,520 INFO L129 PetriNetUnfolder]: 235/624 cut-off events. [2020-10-16 00:01:47,520 INFO L130 PetriNetUnfolder]: For 92214/92216 co-relation queries the response was YES. [2020-10-16 00:01:47,532 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11539 conditions, 624 events. 235/624 cut-off events. For 92214/92216 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3420 event pairs, 0 based on Foata normal form. 2/626 useless extension candidates. Maximal degree in co-relation 11370. Up to 375 conditions per place. [2020-10-16 00:01:47,541 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 208 selfloop transitions, 56 changer transitions 0/271 dead transitions. [2020-10-16 00:01:47,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 271 transitions, 9680 flow [2020-10-16 00:01:47,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 00:01:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 00:01:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1345 transitions. [2020-10-16 00:01:47,543 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6725 [2020-10-16 00:01:47,544 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1345 transitions. [2020-10-16 00:01:47,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1345 transitions. [2020-10-16 00:01:47,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:47,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1345 transitions. [2020-10-16 00:01:47,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 00:01:47,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 00:01:47,547 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 00:01:47,547 INFO L185 Difference]: Start difference. First operand has 381 places, 252 transitions, 7808 flow. Second operand 20 states and 1345 transitions. [2020-10-16 00:01:47,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 271 transitions, 9680 flow [2020-10-16 00:01:47,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 271 transitions, 9112 flow, removed 111 selfloop flow, removed 26 redundant places. [2020-10-16 00:01:47,874 INFO L241 Difference]: Finished difference. Result has 376 places, 254 transitions, 7526 flow [2020-10-16 00:01:47,874 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=7258, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7526, PETRI_PLACES=376, PETRI_TRANSITIONS=254} [2020-10-16 00:01:47,874 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 358 predicate places. [2020-10-16 00:01:47,874 INFO L481 AbstractCegarLoop]: Abstraction has has 376 places, 254 transitions, 7526 flow [2020-10-16 00:01:47,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 00:01:47,875 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:47,875 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:48,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:48,081 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:48,081 INFO L82 PathProgramCache]: Analyzing trace with hash 50938499, now seen corresponding path program 60 times [2020-10-16 00:01:48,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:48,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535131923] [2020-10-16 00:01:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:48,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535131923] [2020-10-16 00:01:48,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343467907] [2020-10-16 00:01:48,285 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:48,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 00:01:48,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 00:01:48,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:48,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:48,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:48,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 00:01:48,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442858678] [2020-10-16 00:01:48,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 00:01:48,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:48,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 00:01:48,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 00:01:48,374 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:48,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 254 transitions, 7526 flow. Second operand 19 states. [2020-10-16 00:01:48,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:48,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:48,375 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:49,041 INFO L129 PetriNetUnfolder]: 245/655 cut-off events. [2020-10-16 00:01:49,042 INFO L130 PetriNetUnfolder]: For 99450/99456 co-relation queries the response was YES. [2020-10-16 00:01:49,052 INFO L80 FinitePrefix]: Finished finitePrefix Result has 12069 conditions, 655 events. 245/655 cut-off events. For 99450/99456 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3633 event pairs, 0 based on Foata normal form. 8/663 useless extension candidates. Maximal degree in co-relation 11898. Up to 395 conditions per place. [2020-10-16 00:01:49,058 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 192 selfloop transitions, 82 changer transitions 0/281 dead transitions. [2020-10-16 00:01:49,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 281 transitions, 9773 flow [2020-10-16 00:01:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 00:01:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 00:01:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1413 transitions. [2020-10-16 00:01:49,060 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6728571428571428 [2020-10-16 00:01:49,060 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1413 transitions. [2020-10-16 00:01:49,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1413 transitions. [2020-10-16 00:01:49,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:49,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1413 transitions. [2020-10-16 00:01:49,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 00:01:49,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 00:01:49,062 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 00:01:49,062 INFO L185 Difference]: Start difference. First operand has 376 places, 254 transitions, 7526 flow. Second operand 21 states and 1413 transitions. [2020-10-16 00:01:49,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 281 transitions, 9773 flow [2020-10-16 00:01:49,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 281 transitions, 9513 flow, removed 78 selfloop flow, removed 17 redundant places. [2020-10-16 00:01:49,397 INFO L241 Difference]: Finished difference. Result has 385 places, 264 transitions, 8020 flow [2020-10-16 00:01:49,398 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=7304, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8020, PETRI_PLACES=385, PETRI_TRANSITIONS=264} [2020-10-16 00:01:49,398 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 367 predicate places. [2020-10-16 00:01:49,398 INFO L481 AbstractCegarLoop]: Abstraction has has 385 places, 264 transitions, 8020 flow [2020-10-16 00:01:49,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 00:01:49,398 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:49,398 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:49,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:49,599 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:49,600 INFO L82 PathProgramCache]: Analyzing trace with hash 739260289, now seen corresponding path program 61 times [2020-10-16 00:01:49,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:49,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447317595] [2020-10-16 00:01:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:49,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447317595] [2020-10-16 00:01:49,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164387354] [2020-10-16 00:01:49,773 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:49,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 00:01:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:49,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:49,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 00:01:49,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326967125] [2020-10-16 00:01:49,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 00:01:49,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:49,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 00:01:49,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 00:01:49,853 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:49,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 264 transitions, 8020 flow. Second operand 18 states. [2020-10-16 00:01:49,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:49,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:49,854 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:50,494 INFO L129 PetriNetUnfolder]: 261/703 cut-off events. [2020-10-16 00:01:50,494 INFO L130 PetriNetUnfolder]: For 107553/107559 co-relation queries the response was YES. [2020-10-16 00:01:50,503 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13075 conditions, 703 events. 261/703 cut-off events. For 107553/107559 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4011 event pairs, 0 based on Foata normal form. 5/708 useless extension candidates. Maximal degree in co-relation 12898. Up to 427 conditions per place. [2020-10-16 00:01:50,511 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 174 selfloop transitions, 118 changer transitions 0/299 dead transitions. [2020-10-16 00:01:50,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 299 transitions, 10707 flow [2020-10-16 00:01:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 00:01:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 00:01:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1481 transitions. [2020-10-16 00:01:50,512 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6731818181818182 [2020-10-16 00:01:50,512 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1481 transitions. [2020-10-16 00:01:50,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1481 transitions. [2020-10-16 00:01:50,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:50,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1481 transitions. [2020-10-16 00:01:50,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 00:01:50,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 00:01:50,514 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 00:01:50,515 INFO L185 Difference]: Start difference. First operand has 385 places, 264 transitions, 8020 flow. Second operand 22 states and 1481 transitions. [2020-10-16 00:01:50,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 299 transitions, 10707 flow [2020-10-16 00:01:50,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 299 transitions, 10418 flow, removed 95 selfloop flow, removed 13 redundant places. [2020-10-16 00:01:50,867 INFO L241 Difference]: Finished difference. Result has 403 places, 280 transitions, 8913 flow [2020-10-16 00:01:50,867 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8913, PETRI_PLACES=403, PETRI_TRANSITIONS=280} [2020-10-16 00:01:50,868 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 385 predicate places. [2020-10-16 00:01:50,868 INFO L481 AbstractCegarLoop]: Abstraction has has 403 places, 280 transitions, 8913 flow [2020-10-16 00:01:50,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 00:01:50,868 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:50,868 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:51,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-16 00:01:51,074 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:51,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:51,074 INFO L82 PathProgramCache]: Analyzing trace with hash 519781787, now seen corresponding path program 62 times [2020-10-16 00:01:51,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:51,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904342868] [2020-10-16 00:01:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:51,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904342868] [2020-10-16 00:01:51,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538893770] [2020-10-16 00:01:51,264 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:51,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:01:51,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:51,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 00:01:51,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:51,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:51,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:51,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 00:01:51,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880295288] [2020-10-16 00:01:51,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 00:01:51,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:51,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 00:01:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 00:01:51,347 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:51,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 280 transitions, 8913 flow. Second operand 19 states. [2020-10-16 00:01:51,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:51,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:51,348 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:52,076 INFO L129 PetriNetUnfolder]: 263/709 cut-off events. [2020-10-16 00:01:52,076 INFO L130 PetriNetUnfolder]: For 108883/108885 co-relation queries the response was YES. [2020-10-16 00:01:52,086 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13312 conditions, 709 events. 263/709 cut-off events. For 108883/108885 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4054 event pairs, 0 based on Foata normal form. 4/713 useless extension candidates. Maximal degree in co-relation 13125. Up to 431 conditions per place. [2020-10-16 00:01:52,094 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 154 selfloop transitions, 140 changer transitions 0/301 dead transitions. [2020-10-16 00:01:52,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 301 transitions, 11009 flow [2020-10-16 00:01:52,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 00:01:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 00:01:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1549 transitions. [2020-10-16 00:01:52,096 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734782608695652 [2020-10-16 00:01:52,096 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1549 transitions. [2020-10-16 00:01:52,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1549 transitions. [2020-10-16 00:01:52,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:52,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1549 transitions. [2020-10-16 00:01:52,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 00:01:52,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 00:01:52,099 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 00:01:52,100 INFO L185 Difference]: Start difference. First operand has 403 places, 280 transitions, 8913 flow. Second operand 23 states and 1549 transitions. [2020-10-16 00:01:52,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 301 transitions, 11009 flow [2020-10-16 00:01:52,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 301 transitions, 10724 flow, removed 91 selfloop flow, removed 11 redundant places. [2020-10-16 00:01:52,482 INFO L241 Difference]: Finished difference. Result has 416 places, 282 transitions, 9130 flow [2020-10-16 00:01:52,483 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=8670, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9130, PETRI_PLACES=416, PETRI_TRANSITIONS=282} [2020-10-16 00:01:52,483 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 398 predicate places. [2020-10-16 00:01:52,483 INFO L481 AbstractCegarLoop]: Abstraction has has 416 places, 282 transitions, 9130 flow [2020-10-16 00:01:52,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 00:01:52,483 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:52,483 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:52,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:52,690 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:52,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:52,690 INFO L82 PathProgramCache]: Analyzing trace with hash 107292771, now seen corresponding path program 63 times [2020-10-16 00:01:52,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:52,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947648783] [2020-10-16 00:01:52,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:52,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947648783] [2020-10-16 00:01:52,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383870193] [2020-10-16 00:01:52,864 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:52,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 00:01:52,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:52,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 00:01:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:52,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:52,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 00:01:52,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774998411] [2020-10-16 00:01:52,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 00:01:52,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:52,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 00:01:52,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 00:01:52,932 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:52,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 282 transitions, 9130 flow. Second operand 18 states. [2020-10-16 00:01:52,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:52,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:52,933 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:53,625 INFO L129 PetriNetUnfolder]: 267/721 cut-off events. [2020-10-16 00:01:53,626 INFO L130 PetriNetUnfolder]: For 110281/110283 co-relation queries the response was YES. [2020-10-16 00:01:53,636 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13603 conditions, 721 events. 267/721 cut-off events. For 110281/110283 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4074 event pairs, 0 based on Foata normal form. 2/723 useless extension candidates. Maximal degree in co-relation 13414. Up to 439 conditions per place. [2020-10-16 00:01:53,643 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 128 selfloop transitions, 172 changer transitions 0/307 dead transitions. [2020-10-16 00:01:53,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 307 transitions, 11430 flow [2020-10-16 00:01:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 00:01:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 00:01:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1617 transitions. [2020-10-16 00:01:53,645 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67375 [2020-10-16 00:01:53,645 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1617 transitions. [2020-10-16 00:01:53,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1617 transitions. [2020-10-16 00:01:53,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:53,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1617 transitions. [2020-10-16 00:01:53,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 00:01:53,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 00:01:53,647 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 00:01:53,648 INFO L185 Difference]: Start difference. First operand has 416 places, 282 transitions, 9130 flow. Second operand 24 states and 1617 transitions. [2020-10-16 00:01:53,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 307 transitions, 11430 flow [2020-10-16 00:01:54,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 307 transitions, 11056 flow, removed 81 selfloop flow, removed 18 redundant places. [2020-10-16 00:01:54,049 INFO L241 Difference]: Finished difference. Result has 423 places, 286 transitions, 9386 flow [2020-10-16 00:01:54,049 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=8802, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=9386, PETRI_PLACES=423, PETRI_TRANSITIONS=286} [2020-10-16 00:01:54,050 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 405 predicate places. [2020-10-16 00:01:54,050 INFO L481 AbstractCegarLoop]: Abstraction has has 423 places, 286 transitions, 9386 flow [2020-10-16 00:01:54,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 00:01:54,050 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:54,050 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:54,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 00:01:54,263 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:54,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1364182471, now seen corresponding path program 64 times [2020-10-16 00:01:54,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:54,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380402093] [2020-10-16 00:01:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:54,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380402093] [2020-10-16 00:01:54,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661001726] [2020-10-16 00:01:54,433 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:54,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:01:54,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:54,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 00:01:54,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:54,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:54,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:54,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 00:01:54,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049915672] [2020-10-16 00:01:54,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 00:01:54,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:54,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 00:01:54,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-16 00:01:54,524 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:54,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 286 transitions, 9386 flow. Second operand 19 states. [2020-10-16 00:01:54,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:54,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:54,525 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:55,346 INFO L129 PetriNetUnfolder]: 269/727 cut-off events. [2020-10-16 00:01:55,346 INFO L130 PetriNetUnfolder]: For 111071/111073 co-relation queries the response was YES. [2020-10-16 00:01:55,356 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13787 conditions, 727 events. 269/727 cut-off events. For 111071/111073 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4186 event pairs, 0 based on Foata normal form. 4/731 useless extension candidates. Maximal degree in co-relation 13596. Up to 443 conditions per place. [2020-10-16 00:01:55,364 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 112 selfloop transitions, 190 changer transitions 0/309 dead transitions. [2020-10-16 00:01:55,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 309 transitions, 11642 flow [2020-10-16 00:01:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 00:01:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 00:01:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1685 transitions. [2020-10-16 00:01:55,365 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 00:01:55,366 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1685 transitions. [2020-10-16 00:01:55,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1685 transitions. [2020-10-16 00:01:55,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:55,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1685 transitions. [2020-10-16 00:01:55,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 00:01:55,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 00:01:55,368 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 00:01:55,368 INFO L185 Difference]: Start difference. First operand has 423 places, 286 transitions, 9386 flow. Second operand 25 states and 1685 transitions. [2020-10-16 00:01:55,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 309 transitions, 11642 flow [2020-10-16 00:01:55,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 309 transitions, 11140 flow, removed 81 selfloop flow, removed 23 redundant places. [2020-10-16 00:01:55,765 INFO L241 Difference]: Finished difference. Result has 426 places, 288 transitions, 9506 flow [2020-10-16 00:01:55,765 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=8930, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9506, PETRI_PLACES=426, PETRI_TRANSITIONS=288} [2020-10-16 00:01:55,766 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 408 predicate places. [2020-10-16 00:01:55,766 INFO L481 AbstractCegarLoop]: Abstraction has has 426 places, 288 transitions, 9506 flow [2020-10-16 00:01:55,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 00:01:55,766 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:55,766 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:55,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:55,967 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1314592315, now seen corresponding path program 65 times [2020-10-16 00:01:55,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:55,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768237265] [2020-10-16 00:01:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:56,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768237265] [2020-10-16 00:01:56,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870198823] [2020-10-16 00:01:56,132 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:56,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 00:01:56,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 00:01:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:56,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:56,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 00:01:56,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273999212] [2020-10-16 00:01:56,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 00:01:56,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:56,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 00:01:56,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-16 00:01:56,221 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:56,222 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 288 transitions, 9506 flow. Second operand 18 states. [2020-10-16 00:01:56,222 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:56,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:56,223 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:57,426 INFO L129 PetriNetUnfolder]: 273/739 cut-off events. [2020-10-16 00:01:57,426 INFO L130 PetriNetUnfolder]: For 112615/112621 co-relation queries the response was YES. [2020-10-16 00:01:57,444 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14026 conditions, 739 events. 273/739 cut-off events. For 112615/112621 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4256 event pairs, 0 based on Foata normal form. 5/744 useless extension candidates. Maximal degree in co-relation 13833. Up to 451 conditions per place. [2020-10-16 00:01:57,457 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 90 selfloop transitions, 218 changer transitions 0/315 dead transitions. [2020-10-16 00:01:57,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 315 transitions, 11960 flow [2020-10-16 00:01:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 00:01:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 00:01:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1753 transitions. [2020-10-16 00:01:57,460 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742307692307692 [2020-10-16 00:01:57,460 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1753 transitions. [2020-10-16 00:01:57,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1753 transitions. [2020-10-16 00:01:57,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:57,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1753 transitions. [2020-10-16 00:01:57,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 00:01:57,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 00:01:57,465 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 00:01:57,465 INFO L185 Difference]: Start difference. First operand has 426 places, 288 transitions, 9506 flow. Second operand 26 states and 1753 transitions. [2020-10-16 00:01:57,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 315 transitions, 11960 flow [2020-10-16 00:01:58,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 315 transitions, 11462 flow, removed 83 selfloop flow, removed 22 redundant places. [2020-10-16 00:01:58,041 INFO L241 Difference]: Finished difference. Result has 431 places, 292 transitions, 9744 flow [2020-10-16 00:01:58,041 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=9058, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9744, PETRI_PLACES=431, PETRI_TRANSITIONS=292} [2020-10-16 00:01:58,041 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 413 predicate places. [2020-10-16 00:01:58,042 INFO L481 AbstractCegarLoop]: Abstraction has has 431 places, 292 transitions, 9744 flow [2020-10-16 00:01:58,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 00:01:58,042 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:58,042 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:58,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 00:01:58,243 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:58,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:58,243 INFO L82 PathProgramCache]: Analyzing trace with hash -2064335679, now seen corresponding path program 66 times [2020-10-16 00:01:58,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:58,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089246291] [2020-10-16 00:01:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:58,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089246291] [2020-10-16 00:01:58,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962755653] [2020-10-16 00:01:58,406 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:01:58,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 00:01:58,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:01:58,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 00:01:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:01:58,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:01:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:58,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:01:58,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 00:01:58,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529893909] [2020-10-16 00:01:58,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 00:01:58,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:58,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 00:01:58,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 00:01:58,497 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:01:58,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 292 transitions, 9744 flow. Second operand 19 states. [2020-10-16 00:01:58,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:58,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:01:58,498 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:59,503 INFO L129 PetriNetUnfolder]: 281/762 cut-off events. [2020-10-16 00:01:59,503 INFO L130 PetriNetUnfolder]: For 115774/115780 co-relation queries the response was YES. [2020-10-16 00:01:59,514 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14511 conditions, 762 events. 281/762 cut-off events. For 115774/115780 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4456 event pairs, 0 based on Foata normal form. 8/770 useless extension candidates. Maximal degree in co-relation 14316. Up to 467 conditions per place. [2020-10-16 00:01:59,522 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 66 selfloop transitions, 252 changer transitions 0/325 dead transitions. [2020-10-16 00:01:59,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 325 transitions, 12467 flow [2020-10-16 00:01:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 00:01:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-16 00:01:59,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1957 transitions. [2020-10-16 00:01:59,524 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748275862068965 [2020-10-16 00:01:59,524 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1957 transitions. [2020-10-16 00:01:59,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1957 transitions. [2020-10-16 00:01:59,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:59,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1957 transitions. [2020-10-16 00:01:59,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-16 00:01:59,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-16 00:01:59,527 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-16 00:01:59,527 INFO L185 Difference]: Start difference. First operand has 431 places, 292 transitions, 9744 flow. Second operand 29 states and 1957 transitions. [2020-10-16 00:01:59,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 325 transitions, 12467 flow [2020-10-16 00:01:59,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 325 transitions, 11917 flow, removed 85 selfloop flow, removed 23 redundant places. [2020-10-16 00:01:59,959 INFO L241 Difference]: Finished difference. Result has 440 places, 300 transitions, 10196 flow [2020-10-16 00:01:59,960 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=9248, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10196, PETRI_PLACES=440, PETRI_TRANSITIONS=300} [2020-10-16 00:01:59,960 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 422 predicate places. [2020-10-16 00:01:59,960 INFO L481 AbstractCegarLoop]: Abstraction has has 440 places, 300 transitions, 10196 flow [2020-10-16 00:01:59,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 00:01:59,960 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:59,960 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:00,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:00,161 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1577252829, now seen corresponding path program 67 times [2020-10-16 00:02:00,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:00,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769222485] [2020-10-16 00:02:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:00,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769222485] [2020-10-16 00:02:00,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824986831] [2020-10-16 00:02:00,318 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:00,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 00:02:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:00,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:02:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:00,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:00,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 00:02:00,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246775857] [2020-10-16 00:02:00,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 00:02:00,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:00,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 00:02:00,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-16 00:02:00,418 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:00,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 300 transitions, 10196 flow. Second operand 19 states. [2020-10-16 00:02:00,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:00,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:00,419 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:01,573 INFO L129 PetriNetUnfolder]: 285/772 cut-off events. [2020-10-16 00:02:01,573 INFO L130 PetriNetUnfolder]: For 117478/117484 co-relation queries the response was YES. [2020-10-16 00:02:01,584 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14844 conditions, 772 events. 285/772 cut-off events. For 117478/117484 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4503 event pairs, 0 based on Foata normal form. 8/780 useless extension candidates. Maximal degree in co-relation 14645. Up to 475 conditions per place. [2020-10-16 00:02:01,593 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 52 selfloop transitions, 272 changer transitions 0/331 dead transitions. [2020-10-16 00:02:01,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 331 transitions, 12978 flow [2020-10-16 00:02:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 00:02:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 00:02:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2093 transitions. [2020-10-16 00:02:01,595 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751612903225807 [2020-10-16 00:02:01,595 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2093 transitions. [2020-10-16 00:02:01,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2093 transitions. [2020-10-16 00:02:01,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:01,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2093 transitions. [2020-10-16 00:02:01,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 00:02:01,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 00:02:01,598 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 00:02:01,598 INFO L185 Difference]: Start difference. First operand has 440 places, 300 transitions, 10196 flow. Second operand 31 states and 2093 transitions. [2020-10-16 00:02:01,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 331 transitions, 12978 flow [2020-10-16 00:02:02,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 331 transitions, 12425 flow, removed 93 selfloop flow, removed 24 redundant places. [2020-10-16 00:02:02,048 INFO L241 Difference]: Finished difference. Result has 448 places, 304 transitions, 10521 flow [2020-10-16 00:02:02,049 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=9705, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=10521, PETRI_PLACES=448, PETRI_TRANSITIONS=304} [2020-10-16 00:02:02,049 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 430 predicate places. [2020-10-16 00:02:02,049 INFO L481 AbstractCegarLoop]: Abstraction has has 448 places, 304 transitions, 10521 flow [2020-10-16 00:02:02,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 00:02:02,049 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:02,049 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:02,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 00:02:02,250 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash -372075953, now seen corresponding path program 68 times [2020-10-16 00:02:02,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:02,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581846543] [2020-10-16 00:02:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:02,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581846543] [2020-10-16 00:02:02,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770553461] [2020-10-16 00:02:02,405 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:02,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:02:02,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:02,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 00:02:02,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:02,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:02:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:02,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:02,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 00:02:02,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131306779] [2020-10-16 00:02:02,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 00:02:02,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:02,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 00:02:02,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-16 00:02:02,522 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:02,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 304 transitions, 10521 flow. Second operand 19 states. [2020-10-16 00:02:02,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:02,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:02,529 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:03,701 INFO L129 PetriNetUnfolder]: 289/782 cut-off events. [2020-10-16 00:02:03,701 INFO L130 PetriNetUnfolder]: For 119341/119343 co-relation queries the response was YES. [2020-10-16 00:02:03,713 INFO L80 FinitePrefix]: Finished finitePrefix Result has 15165 conditions, 782 events. 289/782 cut-off events. For 119341/119343 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4584 event pairs, 0 based on Foata normal form. 4/786 useless extension candidates. Maximal degree in co-relation 14964. Up to 481 conditions per place. [2020-10-16 00:02:03,721 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 44 selfloop transitions, 286 changer transitions 0/337 dead transitions. [2020-10-16 00:02:03,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 337 transitions, 13529 flow [2020-10-16 00:02:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 00:02:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-16 00:02:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2229 transitions. [2020-10-16 00:02:03,724 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754545454545454 [2020-10-16 00:02:03,724 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2229 transitions. [2020-10-16 00:02:03,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2229 transitions. [2020-10-16 00:02:03,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:03,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2229 transitions. [2020-10-16 00:02:03,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-16 00:02:03,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-16 00:02:03,727 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-16 00:02:03,727 INFO L185 Difference]: Start difference. First operand has 448 places, 304 transitions, 10521 flow. Second operand 33 states and 2229 transitions. [2020-10-16 00:02:03,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 337 transitions, 13529 flow [2020-10-16 00:02:04,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 337 transitions, 12881 flow, removed 92 selfloop flow, removed 27 redundant places. [2020-10-16 00:02:04,311 INFO L241 Difference]: Finished difference. Result has 456 places, 308 transitions, 10869 flow [2020-10-16 00:02:04,312 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=9937, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10869, PETRI_PLACES=456, PETRI_TRANSITIONS=308} [2020-10-16 00:02:04,312 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 438 predicate places. [2020-10-16 00:02:04,312 INFO L481 AbstractCegarLoop]: Abstraction has has 456 places, 308 transitions, 10869 flow [2020-10-16 00:02:04,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 00:02:04,312 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:04,312 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:04,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 00:02:04,513 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1332079165, now seen corresponding path program 69 times [2020-10-16 00:02:04,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:04,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867819707] [2020-10-16 00:02:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:04,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867819707] [2020-10-16 00:02:04,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5773229] [2020-10-16 00:02:04,655 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:04,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 00:02:04,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 00:02:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:04,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:02:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:04,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:04,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 00:02:04,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070017688] [2020-10-16 00:02:04,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 00:02:04,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:04,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 00:02:04,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-16 00:02:04,751 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:04,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 308 transitions, 10869 flow. Second operand 19 states. [2020-10-16 00:02:04,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:04,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:04,752 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:05,841 INFO L129 PetriNetUnfolder]: 292/788 cut-off events. [2020-10-16 00:02:05,841 INFO L130 PetriNetUnfolder]: For 123661/123667 co-relation queries the response was YES. [2020-10-16 00:02:05,853 INFO L80 FinitePrefix]: Finished finitePrefix Result has 15523 conditions, 788 events. 292/788 cut-off events. For 123661/123667 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4631 event pairs, 0 based on Foata normal form. 7/795 useless extension candidates. Maximal degree in co-relation 15319. Up to 485 conditions per place. [2020-10-16 00:02:05,861 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 88 selfloop transitions, 244 changer transitions 0/339 dead transitions. [2020-10-16 00:02:05,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 339 transitions, 13783 flow [2020-10-16 00:02:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 00:02:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 00:02:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2161 transitions. [2020-10-16 00:02:05,864 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753125 [2020-10-16 00:02:05,864 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2161 transitions. [2020-10-16 00:02:05,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2161 transitions. [2020-10-16 00:02:05,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:05,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2161 transitions. [2020-10-16 00:02:05,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 00:02:05,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 00:02:05,869 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 00:02:05,869 INFO L185 Difference]: Start difference. First operand has 456 places, 308 transitions, 10869 flow. Second operand 32 states and 2161 transitions. [2020-10-16 00:02:05,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 339 transitions, 13783 flow [2020-10-16 00:02:06,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 339 transitions, 13085 flow, removed 111 selfloop flow, removed 28 redundant places. [2020-10-16 00:02:06,406 INFO L241 Difference]: Finished difference. Result has 461 places, 311 transitions, 10953 flow [2020-10-16 00:02:06,407 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=10203, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10953, PETRI_PLACES=461, PETRI_TRANSITIONS=311} [2020-10-16 00:02:06,407 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 443 predicate places. [2020-10-16 00:02:06,407 INFO L481 AbstractCegarLoop]: Abstraction has has 461 places, 311 transitions, 10953 flow [2020-10-16 00:02:06,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 00:02:06,407 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:06,407 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:06,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:06,608 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:06,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1350563652, now seen corresponding path program 70 times [2020-10-16 00:02:06,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:06,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256090704] [2020-10-16 00:02:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:06,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256090704] [2020-10-16 00:02:06,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141475501] [2020-10-16 00:02:06,772 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:06,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:02:06,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:06,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 00:02:06,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:06,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:02:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:06,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:06,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 00:02:06,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366737881] [2020-10-16 00:02:06,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 00:02:06,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:06,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 00:02:06,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-16 00:02:06,866 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:06,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 311 transitions, 10953 flow. Second operand 20 states. [2020-10-16 00:02:06,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:06,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:06,866 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:08,120 INFO L129 PetriNetUnfolder]: 295/794 cut-off events. [2020-10-16 00:02:08,121 INFO L130 PetriNetUnfolder]: For 128011/128017 co-relation queries the response was YES. [2020-10-16 00:02:08,132 INFO L80 FinitePrefix]: Finished finitePrefix Result has 15758 conditions, 794 events. 295/794 cut-off events. For 128011/128017 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4661 event pairs, 0 based on Foata normal form. 4/798 useless extension candidates. Maximal degree in co-relation 15552. Up to 489 conditions per place. [2020-10-16 00:02:08,141 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 47 selfloop transitions, 290 changer transitions 0/344 dead transitions. [2020-10-16 00:02:08,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 344 transitions, 14051 flow [2020-10-16 00:02:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 00:02:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 00:02:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2161 transitions. [2020-10-16 00:02:08,143 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753125 [2020-10-16 00:02:08,143 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2161 transitions. [2020-10-16 00:02:08,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2161 transitions. [2020-10-16 00:02:08,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:08,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2161 transitions. [2020-10-16 00:02:08,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 00:02:08,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 00:02:08,146 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 00:02:08,146 INFO L185 Difference]: Start difference. First operand has 461 places, 311 transitions, 10953 flow. Second operand 32 states and 2161 transitions. [2020-10-16 00:02:08,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 344 transitions, 14051 flow [2020-10-16 00:02:08,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 344 transitions, 13444 flow, removed 89 selfloop flow, removed 29 redundant places. [2020-10-16 00:02:08,654 INFO L241 Difference]: Finished difference. Result has 465 places, 314 transitions, 11228 flow [2020-10-16 00:02:08,655 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=10378, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11228, PETRI_PLACES=465, PETRI_TRANSITIONS=314} [2020-10-16 00:02:08,655 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 447 predicate places. [2020-10-16 00:02:08,655 INFO L481 AbstractCegarLoop]: Abstraction has has 465 places, 314 transitions, 11228 flow [2020-10-16 00:02:08,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 00:02:08,655 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:08,655 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:08,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:08,865 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1627630641, now seen corresponding path program 71 times [2020-10-16 00:02:08,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:08,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53386263] [2020-10-16 00:02:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:09,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53386263] [2020-10-16 00:02:09,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476143587] [2020-10-16 00:02:09,092 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:09,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 00:02:09,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:09,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 00:02:09,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:09,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:09,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 00:02:09,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235251289] [2020-10-16 00:02:09,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 00:02:09,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 00:02:09,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-16 00:02:09,158 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:09,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 314 transitions, 11228 flow. Second operand 19 states. [2020-10-16 00:02:09,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:09,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:09,159 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:09,822 INFO L129 PetriNetUnfolder]: 297/801 cut-off events. [2020-10-16 00:02:09,823 INFO L130 PetriNetUnfolder]: For 133537/133539 co-relation queries the response was YES. [2020-10-16 00:02:09,836 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16033 conditions, 801 events. 297/801 cut-off events. For 133537/133539 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4716 event pairs, 0 based on Foata normal form. 4/805 useless extension candidates. Maximal degree in co-relation 15825. Up to 520 conditions per place. [2020-10-16 00:02:09,845 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 299 selfloop transitions, 27 changer transitions 0/333 dead transitions. [2020-10-16 00:02:09,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 333 transitions, 13312 flow [2020-10-16 00:02:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 00:02:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 00:02:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1344 transitions. [2020-10-16 00:02:09,846 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.672 [2020-10-16 00:02:09,847 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1344 transitions. [2020-10-16 00:02:09,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1344 transitions. [2020-10-16 00:02:09,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:09,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1344 transitions. [2020-10-16 00:02:09,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 00:02:09,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 00:02:09,848 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 00:02:09,849 INFO L185 Difference]: Start difference. First operand has 465 places, 314 transitions, 11228 flow. Second operand 20 states and 1344 transitions. [2020-10-16 00:02:09,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 333 transitions, 13312 flow [2020-10-16 00:02:10,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 333 transitions, 12636 flow, removed 76 selfloop flow, removed 28 redundant places. [2020-10-16 00:02:10,409 INFO L241 Difference]: Finished difference. Result has 458 places, 316 transitions, 10768 flow [2020-10-16 00:02:10,409 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=10552, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10768, PETRI_PLACES=458, PETRI_TRANSITIONS=316} [2020-10-16 00:02:10,410 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 440 predicate places. [2020-10-16 00:02:10,410 INFO L481 AbstractCegarLoop]: Abstraction has has 458 places, 316 transitions, 10768 flow [2020-10-16 00:02:10,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 00:02:10,410 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:10,410 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:10,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:10,611 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:10,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:10,611 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 72 times [2020-10-16 00:02:10,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:10,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355691722] [2020-10-16 00:02:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:10,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355691722] [2020-10-16 00:02:10,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352602426] [2020-10-16 00:02:10,817 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:10,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 00:02:10,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:10,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 00:02:10,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:10,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:10,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 00:02:10,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533741184] [2020-10-16 00:02:10,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 00:02:10,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:10,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 00:02:10,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-16 00:02:10,889 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:10,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 316 transitions, 10768 flow. Second operand 19 states. [2020-10-16 00:02:10,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:10,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:10,892 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:11,753 INFO L129 PetriNetUnfolder]: 299/808 cut-off events. [2020-10-16 00:02:11,754 INFO L130 PetriNetUnfolder]: For 141918/141924 co-relation queries the response was YES. [2020-10-16 00:02:11,766 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16141 conditions, 808 events. 299/808 cut-off events. For 141918/141924 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4740 event pairs, 0 based on Foata normal form. 8/816 useless extension candidates. Maximal degree in co-relation 15931. Up to 497 conditions per place. [2020-10-16 00:02:11,775 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 214 selfloop transitions, 118 changer transitions 0/339 dead transitions. [2020-10-16 00:02:11,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 339 transitions, 13210 flow [2020-10-16 00:02:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 00:02:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 00:02:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1751 transitions. [2020-10-16 00:02:11,777 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734615384615384 [2020-10-16 00:02:11,777 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1751 transitions. [2020-10-16 00:02:11,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1751 transitions. [2020-10-16 00:02:11,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:11,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1751 transitions. [2020-10-16 00:02:11,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 00:02:11,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 00:02:11,779 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 00:02:11,779 INFO L185 Difference]: Start difference. First operand has 458 places, 316 transitions, 10768 flow. Second operand 26 states and 1751 transitions. [2020-10-16 00:02:11,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 339 transitions, 13210 flow [2020-10-16 00:02:12,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 339 transitions, 13010 flow, removed 75 selfloop flow, removed 17 redundant places. [2020-10-16 00:02:12,425 INFO L241 Difference]: Finished difference. Result has 468 places, 318 transitions, 11004 flow [2020-10-16 00:02:12,425 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=10592, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11004, PETRI_PLACES=468, PETRI_TRANSITIONS=318} [2020-10-16 00:02:12,425 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 450 predicate places. [2020-10-16 00:02:12,425 INFO L481 AbstractCegarLoop]: Abstraction has has 468 places, 318 transitions, 11004 flow [2020-10-16 00:02:12,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 00:02:12,425 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:12,426 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:12,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:12,633 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash -543203417, now seen corresponding path program 73 times [2020-10-16 00:02:12,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:12,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858384734] [2020-10-16 00:02:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:12,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858384734] [2020-10-16 00:02:12,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216817761] [2020-10-16 00:02:12,849 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 00:02:12,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:12,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:02:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:12,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:12,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 00:02:12,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661978076] [2020-10-16 00:02:12,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 00:02:12,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:12,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 00:02:12,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 00:02:12,930 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:12,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 318 transitions, 11004 flow. Second operand 20 states. [2020-10-16 00:02:12,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:12,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:12,930 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:13,817 INFO L129 PetriNetUnfolder]: 301/814 cut-off events. [2020-10-16 00:02:13,818 INFO L130 PetriNetUnfolder]: For 147027/147029 co-relation queries the response was YES. [2020-10-16 00:02:13,830 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16485 conditions, 814 events. 301/814 cut-off events. For 147027/147029 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4772 event pairs, 0 based on Foata normal form. 4/818 useless extension candidates. Maximal degree in co-relation 16273. Up to 501 conditions per place. [2020-10-16 00:02:13,839 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 196 selfloop transitions, 138 changer transitions 0/341 dead transitions. [2020-10-16 00:02:13,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 341 transitions, 13472 flow [2020-10-16 00:02:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 00:02:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 00:02:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1684 transitions. [2020-10-16 00:02:13,841 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6736 [2020-10-16 00:02:13,841 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1684 transitions. [2020-10-16 00:02:13,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1684 transitions. [2020-10-16 00:02:13,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:13,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1684 transitions. [2020-10-16 00:02:13,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 00:02:13,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 00:02:13,844 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 00:02:13,844 INFO L185 Difference]: Start difference. First operand has 468 places, 318 transitions, 11004 flow. Second operand 25 states and 1684 transitions. [2020-10-16 00:02:13,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 341 transitions, 13472 flow [2020-10-16 00:02:14,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 341 transitions, 13198 flow, removed 89 selfloop flow, removed 14 redundant places. [2020-10-16 00:02:14,518 INFO L241 Difference]: Finished difference. Result has 480 places, 320 transitions, 11236 flow [2020-10-16 00:02:14,519 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=10776, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11236, PETRI_PLACES=480, PETRI_TRANSITIONS=320} [2020-10-16 00:02:14,519 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 462 predicate places. [2020-10-16 00:02:14,519 INFO L481 AbstractCegarLoop]: Abstraction has has 480 places, 320 transitions, 11236 flow [2020-10-16 00:02:14,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 00:02:14,519 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:14,519 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:14,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-16 00:02:14,723 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:14,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1167646413, now seen corresponding path program 74 times [2020-10-16 00:02:14,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:14,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441501143] [2020-10-16 00:02:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:14,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441501143] [2020-10-16 00:02:14,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421286385] [2020-10-16 00:02:14,901 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:14,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:02:14,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:14,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 00:02:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:14,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:02:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:14,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:14,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 00:02:14,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87110269] [2020-10-16 00:02:14,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 00:02:14,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:14,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 00:02:14,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 00:02:14,987 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:14,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 320 transitions, 11236 flow. Second operand 20 states. [2020-10-16 00:02:14,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:14,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:14,988 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:16,115 INFO L129 PetriNetUnfolder]: 305/826 cut-off events. [2020-10-16 00:02:16,115 INFO L130 PetriNetUnfolder]: For 148817/148823 co-relation queries the response was YES. [2020-10-16 00:02:16,128 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16798 conditions, 826 events. 305/826 cut-off events. For 148817/148823 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4845 event pairs, 0 based on Foata normal form. 8/834 useless extension candidates. Maximal degree in co-relation 16585. Up to 509 conditions per place. [2020-10-16 00:02:16,137 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 98 selfloop transitions, 246 changer transitions 0/351 dead transitions. [2020-10-16 00:02:16,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 351 transitions, 14250 flow [2020-10-16 00:02:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 00:02:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 00:02:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2092 transitions. [2020-10-16 00:02:16,139 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748387096774193 [2020-10-16 00:02:16,139 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2092 transitions. [2020-10-16 00:02:16,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2092 transitions. [2020-10-16 00:02:16,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:16,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2092 transitions. [2020-10-16 00:02:16,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 00:02:16,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 00:02:16,144 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 00:02:16,144 INFO L185 Difference]: Start difference. First operand has 480 places, 320 transitions, 11236 flow. Second operand 31 states and 2092 transitions. [2020-10-16 00:02:16,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 351 transitions, 14250 flow [2020-10-16 00:02:16,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 351 transitions, 13802 flow, removed 93 selfloop flow, removed 23 redundant places. [2020-10-16 00:02:16,855 INFO L241 Difference]: Finished difference. Result has 489 places, 324 transitions, 11614 flow [2020-10-16 00:02:16,856 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=10846, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=11614, PETRI_PLACES=489, PETRI_TRANSITIONS=324} [2020-10-16 00:02:16,856 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 471 predicate places. [2020-10-16 00:02:16,856 INFO L481 AbstractCegarLoop]: Abstraction has has 489 places, 324 transitions, 11614 flow [2020-10-16 00:02:16,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 00:02:16,856 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:16,857 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:17,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:17,070 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:17,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1638642123, now seen corresponding path program 75 times [2020-10-16 00:02:17,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:17,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480354452] [2020-10-16 00:02:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:17,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480354452] [2020-10-16 00:02:17,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967295154] [2020-10-16 00:02:17,241 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:17,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 00:02:17,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:17,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 00:02:17,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:17,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:17,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 00:02:17,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68951995] [2020-10-16 00:02:17,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 00:02:17,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:17,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 00:02:17,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 00:02:17,319 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:17,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 324 transitions, 11614 flow. Second operand 19 states. [2020-10-16 00:02:17,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:17,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:17,320 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:18,445 INFO L129 PetriNetUnfolder]: 311/843 cut-off events. [2020-10-16 00:02:18,445 INFO L130 PetriNetUnfolder]: For 151285/151291 co-relation queries the response was YES. [2020-10-16 00:02:18,466 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17269 conditions, 843 events. 311/843 cut-off events. For 151285/151291 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5005 event pairs, 0 based on Foata normal form. 8/851 useless extension candidates. Maximal degree in co-relation 17054. Up to 521 conditions per place. [2020-10-16 00:02:18,476 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 85 selfloop transitions, 268 changer transitions 0/360 dead transitions. [2020-10-16 00:02:18,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 360 transitions, 14947 flow [2020-10-16 00:02:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 00:02:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 00:02:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2295 transitions. [2020-10-16 00:02:18,478 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:02:18,478 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2295 transitions. [2020-10-16 00:02:18,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2295 transitions. [2020-10-16 00:02:18,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:18,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2295 transitions. [2020-10-16 00:02:18,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-16 00:02:18,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-16 00:02:18,481 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-16 00:02:18,481 INFO L185 Difference]: Start difference. First operand has 489 places, 324 transitions, 11614 flow. Second operand 34 states and 2295 transitions. [2020-10-16 00:02:18,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 360 transitions, 14947 flow [2020-10-16 00:02:19,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 360 transitions, 14325 flow, removed 106 selfloop flow, removed 27 redundant places. [2020-10-16 00:02:19,073 INFO L241 Difference]: Finished difference. Result has 499 places, 331 transitions, 12069 flow [2020-10-16 00:02:19,074 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=11057, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12069, PETRI_PLACES=499, PETRI_TRANSITIONS=331} [2020-10-16 00:02:19,074 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 481 predicate places. [2020-10-16 00:02:19,074 INFO L481 AbstractCegarLoop]: Abstraction has has 499 places, 331 transitions, 12069 flow [2020-10-16 00:02:19,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 00:02:19,074 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:19,074 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:19,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 00:02:19,275 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:19,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1654729263, now seen corresponding path program 76 times [2020-10-16 00:02:19,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:19,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374811190] [2020-10-16 00:02:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:19,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374811190] [2020-10-16 00:02:19,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469156804] [2020-10-16 00:02:19,447 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:19,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:02:19,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:19,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 00:02:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:19,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:02:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:19,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:19,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 00:02:19,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96159034] [2020-10-16 00:02:19,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 00:02:19,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:19,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 00:02:19,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 00:02:19,536 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:19,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 331 transitions, 12069 flow. Second operand 20 states. [2020-10-16 00:02:19,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:19,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:19,537 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:20,756 INFO L129 PetriNetUnfolder]: 313/849 cut-off events. [2020-10-16 00:02:20,756 INFO L130 PetriNetUnfolder]: For 156716/156722 co-relation queries the response was YES. [2020-10-16 00:02:20,770 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17604 conditions, 849 events. 313/849 cut-off events. For 156716/156722 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5021 event pairs, 0 based on Foata normal form. 8/857 useless extension candidates. Maximal degree in co-relation 17385. Up to 525 conditions per place. [2020-10-16 00:02:20,780 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 83 selfloop transitions, 272 changer transitions 0/362 dead transitions. [2020-10-16 00:02:20,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 362 transitions, 15235 flow [2020-10-16 00:02:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 00:02:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-16 00:02:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2228 transitions. [2020-10-16 00:02:20,784 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751515151515152 [2020-10-16 00:02:20,784 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2228 transitions. [2020-10-16 00:02:20,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2228 transitions. [2020-10-16 00:02:20,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:20,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2228 transitions. [2020-10-16 00:02:20,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-16 00:02:20,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-16 00:02:20,787 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-16 00:02:20,787 INFO L185 Difference]: Start difference. First operand has 499 places, 331 transitions, 12069 flow. Second operand 33 states and 2228 transitions. [2020-10-16 00:02:20,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 362 transitions, 15235 flow [2020-10-16 00:02:21,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 362 transitions, 14553 flow, removed 126 selfloop flow, removed 29 redundant places. [2020-10-16 00:02:21,565 INFO L241 Difference]: Finished difference. Result has 504 places, 333 transitions, 12195 flow [2020-10-16 00:02:21,566 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=11417, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=12195, PETRI_PLACES=504, PETRI_TRANSITIONS=333} [2020-10-16 00:02:21,566 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 486 predicate places. [2020-10-16 00:02:21,566 INFO L481 AbstractCegarLoop]: Abstraction has has 504 places, 333 transitions, 12195 flow [2020-10-16 00:02:21,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 00:02:21,566 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:21,566 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:21,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:21,773 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1655219373, now seen corresponding path program 77 times [2020-10-16 00:02:21,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:21,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333955825] [2020-10-16 00:02:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:21,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333955825] [2020-10-16 00:02:21,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634363870] [2020-10-16 00:02:21,944 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:21,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 00:02:21,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:21,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 00:02:21,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:22,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:22,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 00:02:22,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540916652] [2020-10-16 00:02:22,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 00:02:22,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:22,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 00:02:22,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-16 00:02:22,021 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:22,022 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 333 transitions, 12195 flow. Second operand 19 states. [2020-10-16 00:02:22,022 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:22,022 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:22,022 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:23,133 INFO L129 PetriNetUnfolder]: 324/875 cut-off events. [2020-10-16 00:02:23,133 INFO L130 PetriNetUnfolder]: For 167496/167498 co-relation queries the response was YES. [2020-10-16 00:02:23,148 INFO L80 FinitePrefix]: Finished finitePrefix Result has 18472 conditions, 875 events. 324/875 cut-off events. For 167496/167498 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5186 event pairs, 0 based on Foata normal form. 4/879 useless extension candidates. Maximal degree in co-relation 18251. Up to 541 conditions per place. [2020-10-16 00:02:23,158 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 77 selfloop transitions, 289 changer transitions 0/373 dead transitions. [2020-10-16 00:02:23,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 373 transitions, 16001 flow [2020-10-16 00:02:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 00:02:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 00:02:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2432 transitions. [2020-10-16 00:02:23,160 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2020-10-16 00:02:23,161 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2432 transitions. [2020-10-16 00:02:23,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2432 transitions. [2020-10-16 00:02:23,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:23,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2432 transitions. [2020-10-16 00:02:23,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 00:02:23,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 00:02:23,166 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 00:02:23,166 INFO L185 Difference]: Start difference. First operand has 504 places, 333 transitions, 12195 flow. Second operand 36 states and 2432 transitions. [2020-10-16 00:02:23,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 373 transitions, 16001 flow [2020-10-16 00:02:23,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 373 transitions, 15281 flow, removed 126 selfloop flow, removed 29 redundant places. [2020-10-16 00:02:23,946 INFO L241 Difference]: Finished difference. Result has 514 places, 341 transitions, 12761 flow [2020-10-16 00:02:23,947 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=11589, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=12761, PETRI_PLACES=514, PETRI_TRANSITIONS=341} [2020-10-16 00:02:23,947 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 496 predicate places. [2020-10-16 00:02:23,948 INFO L481 AbstractCegarLoop]: Abstraction has has 514 places, 341 transitions, 12761 flow [2020-10-16 00:02:23,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 00:02:23,948 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:23,948 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:24,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 00:02:24,159 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:24,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1655236113, now seen corresponding path program 78 times [2020-10-16 00:02:24,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:24,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989450823] [2020-10-16 00:02:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:24,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989450823] [2020-10-16 00:02:24,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523241525] [2020-10-16 00:02:24,327 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:24,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 00:02:24,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:24,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:24,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:24,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:24,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 00:02:24,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607206143] [2020-10-16 00:02:24,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 00:02:24,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:24,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 00:02:24,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 00:02:24,418 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:24,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 341 transitions, 12761 flow. Second operand 20 states. [2020-10-16 00:02:24,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:24,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:24,419 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:25,820 INFO L129 PetriNetUnfolder]: 321/869 cut-off events. [2020-10-16 00:02:25,821 INFO L130 PetriNetUnfolder]: For 174330/174332 co-relation queries the response was YES. [2020-10-16 00:02:25,834 INFO L80 FinitePrefix]: Finished finitePrefix Result has 18602 conditions, 869 events. 321/869 cut-off events. For 174330/174332 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5193 event pairs, 0 based on Foata normal form. 4/873 useless extension candidates. Maximal degree in co-relation 18377. Up to 537 conditions per place. [2020-10-16 00:02:25,844 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 76 selfloop transitions, 290 changer transitions 0/373 dead transitions. [2020-10-16 00:02:25,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 373 transitions, 16129 flow [2020-10-16 00:02:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 00:02:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 00:02:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2364 transitions. [2020-10-16 00:02:25,847 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754285714285714 [2020-10-16 00:02:25,847 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2364 transitions. [2020-10-16 00:02:25,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2364 transitions. [2020-10-16 00:02:25,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:25,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2364 transitions. [2020-10-16 00:02:25,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 00:02:25,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 00:02:25,850 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 00:02:25,850 INFO L185 Difference]: Start difference. First operand has 514 places, 341 transitions, 12761 flow. Second operand 35 states and 2364 transitions. [2020-10-16 00:02:25,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 373 transitions, 16129 flow [2020-10-16 00:02:26,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 373 transitions, 15259 flow, removed 185 selfloop flow, removed 33 redundant places. [2020-10-16 00:02:26,569 INFO L241 Difference]: Finished difference. Result has 517 places, 342 transitions, 12651 flow [2020-10-16 00:02:26,570 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=11891, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12651, PETRI_PLACES=517, PETRI_TRANSITIONS=342} [2020-10-16 00:02:26,570 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 499 predicate places. [2020-10-16 00:02:26,570 INFO L481 AbstractCegarLoop]: Abstraction has has 517 places, 342 transitions, 12651 flow [2020-10-16 00:02:26,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 00:02:26,570 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:26,570 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:26,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:26,771 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:26,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1136241500, now seen corresponding path program 79 times [2020-10-16 00:02:26,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:26,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224307948] [2020-10-16 00:02:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:27,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224307948] [2020-10-16 00:02:27,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513735275] [2020-10-16 00:02:27,024 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:27,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:27,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:27,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 00:02:27,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351392867] [2020-10-16 00:02:27,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 00:02:27,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:27,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 00:02:27,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 00:02:27,091 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:27,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 342 transitions, 12651 flow. Second operand 20 states. [2020-10-16 00:02:27,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:27,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:27,092 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:27,879 INFO L129 PetriNetUnfolder]: 323/875 cut-off events. [2020-10-16 00:02:27,879 INFO L130 PetriNetUnfolder]: For 179591/179597 co-relation queries the response was YES. [2020-10-16 00:02:27,899 INFO L80 FinitePrefix]: Finished finitePrefix Result has 18758 conditions, 875 events. 323/875 cut-off events. For 179591/179597 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5240 event pairs, 0 based on Foata normal form. 5/880 useless extension candidates. Maximal degree in co-relation 18531. Up to 537 conditions per place. [2020-10-16 00:02:27,909 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 296 selfloop transitions, 60 changer transitions 0/363 dead transitions. [2020-10-16 00:02:27,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 363 transitions, 15099 flow [2020-10-16 00:02:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 00:02:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 00:02:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1479 transitions. [2020-10-16 00:02:27,911 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6722727272727272 [2020-10-16 00:02:27,911 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1479 transitions. [2020-10-16 00:02:27,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1479 transitions. [2020-10-16 00:02:27,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:27,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1479 transitions. [2020-10-16 00:02:27,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 00:02:27,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 00:02:27,913 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 00:02:27,913 INFO L185 Difference]: Start difference. First operand has 517 places, 342 transitions, 12651 flow. Second operand 22 states and 1479 transitions. [2020-10-16 00:02:27,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 363 transitions, 15099 flow [2020-10-16 00:02:28,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 363 transitions, 14421 flow, removed 72 selfloop flow, removed 32 redundant places. [2020-10-16 00:02:28,673 INFO L241 Difference]: Finished difference. Result has 508 places, 344 transitions, 12331 flow [2020-10-16 00:02:28,674 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=12035, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12331, PETRI_PLACES=508, PETRI_TRANSITIONS=344} [2020-10-16 00:02:28,674 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 490 predicate places. [2020-10-16 00:02:28,674 INFO L481 AbstractCegarLoop]: Abstraction has has 508 places, 344 transitions, 12331 flow [2020-10-16 00:02:28,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 00:02:28,674 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:28,674 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:28,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:28,875 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:28,875 INFO L82 PathProgramCache]: Analyzing trace with hash -634419144, now seen corresponding path program 80 times [2020-10-16 00:02:28,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:28,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338416360] [2020-10-16 00:02:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:29,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338416360] [2020-10-16 00:02:29,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714960345] [2020-10-16 00:02:29,126 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:29,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:02:29,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:29,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:29,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:29,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:02:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:29,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:29,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 00:02:29,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518831381] [2020-10-16 00:02:29,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 00:02:29,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:29,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 00:02:29,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 00:02:29,220 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:29,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 344 transitions, 12331 flow. Second operand 21 states. [2020-10-16 00:02:29,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:29,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:29,221 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:29,491 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2020-10-16 00:02:30,231 INFO L129 PetriNetUnfolder]: 327/887 cut-off events. [2020-10-16 00:02:30,232 INFO L130 PetriNetUnfolder]: For 177785/177787 co-relation queries the response was YES. [2020-10-16 00:02:30,248 INFO L80 FinitePrefix]: Finished finitePrefix Result has 18691 conditions, 887 events. 327/887 cut-off events. For 177785/177787 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5301 event pairs, 0 based on Foata normal form. 4/891 useless extension candidates. Maximal degree in co-relation 18462. Up to 545 conditions per place. [2020-10-16 00:02:30,258 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 270 selfloop transitions, 90 changer transitions 0/367 dead transitions. [2020-10-16 00:02:30,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 367 transitions, 14844 flow [2020-10-16 00:02:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 00:02:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 00:02:30,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1547 transitions. [2020-10-16 00:02:30,260 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.672608695652174 [2020-10-16 00:02:30,260 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1547 transitions. [2020-10-16 00:02:30,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1547 transitions. [2020-10-16 00:02:30,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:30,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1547 transitions. [2020-10-16 00:02:30,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 00:02:30,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 00:02:30,262 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 00:02:30,262 INFO L185 Difference]: Start difference. First operand has 508 places, 344 transitions, 12331 flow. Second operand 23 states and 1547 transitions. [2020-10-16 00:02:30,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 367 transitions, 14844 flow [2020-10-16 00:02:31,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 367 transitions, 14582 flow, removed 75 selfloop flow, removed 19 redundant places. [2020-10-16 00:02:31,043 INFO L241 Difference]: Finished difference. Result has 513 places, 348 transitions, 12536 flow [2020-10-16 00:02:31,043 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=12089, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12536, PETRI_PLACES=513, PETRI_TRANSITIONS=348} [2020-10-16 00:02:31,043 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 495 predicate places. [2020-10-16 00:02:31,043 INFO L481 AbstractCegarLoop]: Abstraction has has 513 places, 348 transitions, 12536 flow [2020-10-16 00:02:31,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 00:02:31,043 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:31,044 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:31,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:31,244 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:31,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1759549824, now seen corresponding path program 81 times [2020-10-16 00:02:31,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:31,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116898642] [2020-10-16 00:02:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:31,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116898642] [2020-10-16 00:02:31,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947816899] [2020-10-16 00:02:31,486 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:31,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 00:02:31,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:31,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:31,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:31,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:31,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 00:02:31,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163383664] [2020-10-16 00:02:31,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 00:02:31,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:31,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 00:02:31,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 00:02:31,559 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:31,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 348 transitions, 12536 flow. Second operand 20 states. [2020-10-16 00:02:31,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:31,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:31,560 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:32,421 INFO L129 PetriNetUnfolder]: 331/899 cut-off events. [2020-10-16 00:02:32,422 INFO L130 PetriNetUnfolder]: For 185375/185377 co-relation queries the response was YES. [2020-10-16 00:02:32,437 INFO L80 FinitePrefix]: Finished finitePrefix Result has 19131 conditions, 899 events. 331/899 cut-off events. For 185375/185377 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5398 event pairs, 0 based on Foata normal form. 2/901 useless extension candidates. Maximal degree in co-relation 18900. Up to 553 conditions per place. [2020-10-16 00:02:32,448 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 236 selfloop transitions, 130 changer transitions 0/373 dead transitions. [2020-10-16 00:02:32,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 373 transitions, 15253 flow [2020-10-16 00:02:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 00:02:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 00:02:32,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1615 transitions. [2020-10-16 00:02:32,449 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6729166666666667 [2020-10-16 00:02:32,449 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1615 transitions. [2020-10-16 00:02:32,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1615 transitions. [2020-10-16 00:02:32,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:32,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1615 transitions. [2020-10-16 00:02:32,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 00:02:32,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 00:02:32,452 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 00:02:32,452 INFO L185 Difference]: Start difference. First operand has 513 places, 348 transitions, 12536 flow. Second operand 24 states and 1615 transitions. [2020-10-16 00:02:32,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 373 transitions, 15253 flow [2020-10-16 00:02:33,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 373 transitions, 14909 flow, removed 94 selfloop flow, removed 19 redundant places. [2020-10-16 00:02:33,486 INFO L241 Difference]: Finished difference. Result has 519 places, 352 transitions, 12777 flow [2020-10-16 00:02:33,487 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=12242, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12777, PETRI_PLACES=519, PETRI_TRANSITIONS=352} [2020-10-16 00:02:33,487 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 501 predicate places. [2020-10-16 00:02:33,487 INFO L481 AbstractCegarLoop]: Abstraction has has 519 places, 352 transitions, 12777 flow [2020-10-16 00:02:33,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 00:02:33,487 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:33,487 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:33,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:33,688 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash -659168028, now seen corresponding path program 82 times [2020-10-16 00:02:33,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:33,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604672452] [2020-10-16 00:02:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:33,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604672452] [2020-10-16 00:02:33,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681978342] [2020-10-16 00:02:33,924 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:33,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:02:33,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:33,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:33,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:33,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:02:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:34,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:34,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 00:02:34,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442913398] [2020-10-16 00:02:34,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 00:02:34,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:34,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 00:02:34,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-16 00:02:34,011 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:34,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 352 transitions, 12777 flow. Second operand 21 states. [2020-10-16 00:02:34,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:34,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:34,012 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:35,526 INFO L129 PetriNetUnfolder]: 335/911 cut-off events. [2020-10-16 00:02:35,526 INFO L130 PetriNetUnfolder]: For 187367/187369 co-relation queries the response was YES. [2020-10-16 00:02:35,555 INFO L80 FinitePrefix]: Finished finitePrefix Result has 19432 conditions, 911 events. 335/911 cut-off events. For 187367/187369 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5472 event pairs, 0 based on Foata normal form. 4/915 useless extension candidates. Maximal degree in co-relation 19199. Up to 561 conditions per place. [2020-10-16 00:02:35,572 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 214 selfloop transitions, 156 changer transitions 0/377 dead transitions. [2020-10-16 00:02:35,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 377 transitions, 15502 flow [2020-10-16 00:02:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 00:02:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 00:02:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1683 transitions. [2020-10-16 00:02:35,575 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6732 [2020-10-16 00:02:35,575 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1683 transitions. [2020-10-16 00:02:35,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1683 transitions. [2020-10-16 00:02:35,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:35,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1683 transitions. [2020-10-16 00:02:35,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 00:02:35,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 00:02:35,579 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 00:02:35,579 INFO L185 Difference]: Start difference. First operand has 519 places, 352 transitions, 12777 flow. Second operand 25 states and 1683 transitions. [2020-10-16 00:02:35,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 377 transitions, 15502 flow [2020-10-16 00:02:36,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 377 transitions, 15090 flow, removed 94 selfloop flow, removed 20 redundant places. [2020-10-16 00:02:36,431 INFO L241 Difference]: Finished difference. Result has 525 places, 356 transitions, 13010 flow [2020-10-16 00:02:36,431 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=12415, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13010, PETRI_PLACES=525, PETRI_TRANSITIONS=356} [2020-10-16 00:02:36,432 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 507 predicate places. [2020-10-16 00:02:36,432 INFO L481 AbstractCegarLoop]: Abstraction has has 525 places, 356 transitions, 13010 flow [2020-10-16 00:02:36,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 00:02:36,432 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:36,432 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:36,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:36,633 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash 29153762, now seen corresponding path program 83 times [2020-10-16 00:02:36,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:36,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228407541] [2020-10-16 00:02:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:36,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228407541] [2020-10-16 00:02:36,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661106207] [2020-10-16 00:02:36,857 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:36,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 00:02:36,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:36,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:36,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:36,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:36,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 00:02:36,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3649473] [2020-10-16 00:02:36,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 00:02:36,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:36,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 00:02:36,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 00:02:36,927 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:36,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 356 transitions, 13010 flow. Second operand 20 states. [2020-10-16 00:02:36,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:36,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:36,927 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:37,872 INFO L129 PetriNetUnfolder]: 337/917 cut-off events. [2020-10-16 00:02:37,873 INFO L130 PetriNetUnfolder]: For 188484/188490 co-relation queries the response was YES. [2020-10-16 00:02:37,889 INFO L80 FinitePrefix]: Finished finitePrefix Result has 19599 conditions, 917 events. 337/917 cut-off events. For 188484/188490 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5522 event pairs, 0 based on Foata normal form. 5/922 useless extension candidates. Maximal degree in co-relation 19364. Up to 565 conditions per place. [2020-10-16 00:02:37,901 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 182 selfloop transitions, 192 changer transitions 0/381 dead transitions. [2020-10-16 00:02:37,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 381 transitions, 15828 flow [2020-10-16 00:02:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 00:02:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 00:02:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1751 transitions. [2020-10-16 00:02:37,903 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734615384615384 [2020-10-16 00:02:37,903 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1751 transitions. [2020-10-16 00:02:37,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1751 transitions. [2020-10-16 00:02:37,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:37,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1751 transitions. [2020-10-16 00:02:37,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 00:02:37,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 00:02:37,905 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 00:02:37,905 INFO L185 Difference]: Start difference. First operand has 525 places, 356 transitions, 13010 flow. Second operand 26 states and 1751 transitions. [2020-10-16 00:02:37,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 381 transitions, 15828 flow [2020-10-16 00:02:38,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 381 transitions, 15386 flow, removed 94 selfloop flow, removed 21 redundant places. [2020-10-16 00:02:38,946 INFO L241 Difference]: Finished difference. Result has 531 places, 358 transitions, 13212 flow [2020-10-16 00:02:38,947 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=12618, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13212, PETRI_PLACES=531, PETRI_TRANSITIONS=358} [2020-10-16 00:02:38,947 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 513 predicate places. [2020-10-16 00:02:38,947 INFO L481 AbstractCegarLoop]: Abstraction has has 531 places, 358 transitions, 13212 flow [2020-10-16 00:02:38,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 00:02:38,947 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:38,947 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:39,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:39,148 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:39,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:39,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2024698842, now seen corresponding path program 84 times [2020-10-16 00:02:39,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:39,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955853698] [2020-10-16 00:02:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:39,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955853698] [2020-10-16 00:02:39,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572482693] [2020-10-16 00:02:39,354 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:39,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 00:02:39,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:39,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:39,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:39,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:39,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 00:02:39,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342015088] [2020-10-16 00:02:39,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 00:02:39,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:39,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 00:02:39,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 00:02:39,429 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:39,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 358 transitions, 13212 flow. Second operand 20 states. [2020-10-16 00:02:39,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:39,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:39,429 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:40,515 INFO L129 PetriNetUnfolder]: 345/941 cut-off events. [2020-10-16 00:02:40,515 INFO L130 PetriNetUnfolder]: For 192853/192855 co-relation queries the response was YES. [2020-10-16 00:02:40,532 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20161 conditions, 941 events. 345/941 cut-off events. For 192853/192855 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5714 event pairs, 0 based on Foata normal form. 2/943 useless extension candidates. Maximal degree in co-relation 19924. Up to 581 conditions per place. [2020-10-16 00:02:40,543 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 110 selfloop transitions, 276 changer transitions 0/393 dead transitions. [2020-10-16 00:02:40,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 393 transitions, 16593 flow [2020-10-16 00:02:40,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 00:02:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-16 00:02:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2023 transitions. [2020-10-16 00:02:40,545 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743333333333333 [2020-10-16 00:02:40,545 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2023 transitions. [2020-10-16 00:02:40,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2023 transitions. [2020-10-16 00:02:40,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:40,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2023 transitions. [2020-10-16 00:02:40,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-16 00:02:40,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-16 00:02:40,549 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-16 00:02:40,549 INFO L185 Difference]: Start difference. First operand has 531 places, 358 transitions, 13212 flow. Second operand 30 states and 2023 transitions. [2020-10-16 00:02:40,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 393 transitions, 16593 flow [2020-10-16 00:02:41,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 393 transitions, 16059 flow, removed 96 selfloop flow, removed 23 redundant places. [2020-10-16 00:02:41,441 INFO L241 Difference]: Finished difference. Result has 541 places, 366 transitions, 13797 flow [2020-10-16 00:02:41,441 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=12736, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=13797, PETRI_PLACES=541, PETRI_TRANSITIONS=366} [2020-10-16 00:02:41,441 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 523 predicate places. [2020-10-16 00:02:41,441 INFO L481 AbstractCegarLoop]: Abstraction has has 541 places, 366 transitions, 13797 flow [2020-10-16 00:02:41,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 00:02:41,441 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:41,442 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:41,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:41,642 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:41,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1504955766, now seen corresponding path program 85 times [2020-10-16 00:02:41,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:41,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884519925] [2020-10-16 00:02:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:41,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884519925] [2020-10-16 00:02:41,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067662140] [2020-10-16 00:02:41,844 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:41,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:41,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:41,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:02:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:41,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:41,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 00:02:41,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330004397] [2020-10-16 00:02:41,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 00:02:41,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:41,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 00:02:41,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-16 00:02:41,929 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:41,929 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 366 transitions, 13797 flow. Second operand 21 states. [2020-10-16 00:02:41,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:41,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:41,930 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:42,991 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-10-16 00:02:43,420 INFO L129 PetriNetUnfolder]: 349/953 cut-off events. [2020-10-16 00:02:43,420 INFO L130 PetriNetUnfolder]: For 195415/195417 co-relation queries the response was YES. [2020-10-16 00:02:43,437 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20565 conditions, 953 events. 349/953 cut-off events. For 195415/195417 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5816 event pairs, 0 based on Foata normal form. 4/957 useless extension candidates. Maximal degree in co-relation 20324. Up to 589 conditions per place. [2020-10-16 00:02:43,448 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 100 selfloop transitions, 290 changer transitions 0/397 dead transitions. [2020-10-16 00:02:43,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 397 transitions, 17048 flow [2020-10-16 00:02:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 00:02:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 00:02:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2091 transitions. [2020-10-16 00:02:43,450 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745161290322581 [2020-10-16 00:02:43,450 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2091 transitions. [2020-10-16 00:02:43,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2091 transitions. [2020-10-16 00:02:43,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:43,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2091 transitions. [2020-10-16 00:02:43,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 00:02:43,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 00:02:43,453 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 00:02:43,453 INFO L185 Difference]: Start difference. First operand has 541 places, 366 transitions, 13797 flow. Second operand 31 states and 2091 transitions. [2020-10-16 00:02:43,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 397 transitions, 17048 flow [2020-10-16 00:02:44,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 397 transitions, 16470 flow, removed 102 selfloop flow, removed 24 redundant places. [2020-10-16 00:02:44,352 INFO L241 Difference]: Finished difference. Result has 549 places, 370 transitions, 14163 flow [2020-10-16 00:02:44,352 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=13277, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14163, PETRI_PLACES=549, PETRI_TRANSITIONS=370} [2020-10-16 00:02:44,353 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 531 predicate places. [2020-10-16 00:02:44,353 INFO L481 AbstractCegarLoop]: Abstraction has has 549 places, 370 transitions, 14163 flow [2020-10-16 00:02:44,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 00:02:44,353 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:44,353 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:44,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-16 00:02:44,554 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:44,554 INFO L82 PathProgramCache]: Analyzing trace with hash 150355464, now seen corresponding path program 86 times [2020-10-16 00:02:44,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:44,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898196878] [2020-10-16 00:02:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:44,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898196878] [2020-10-16 00:02:44,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464156307] [2020-10-16 00:02:44,747 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:44,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:02:44,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:44,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:44,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 00:02:44,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020296628] [2020-10-16 00:02:44,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 00:02:44,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:44,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 00:02:44,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 00:02:44,819 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:44,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 370 transitions, 14163 flow. Second operand 20 states. [2020-10-16 00:02:44,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:44,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:44,820 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:45,976 INFO L129 PetriNetUnfolder]: 357/977 cut-off events. [2020-10-16 00:02:45,976 INFO L130 PetriNetUnfolder]: For 199767/199769 co-relation queries the response was YES. [2020-10-16 00:02:45,995 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21174 conditions, 977 events. 357/977 cut-off events. For 199767/199769 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5948 event pairs, 0 based on Foata normal form. 2/979 useless extension candidates. Maximal degree in co-relation 20931. Up to 605 conditions per place. [2020-10-16 00:02:46,006 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 87 selfloop transitions, 314 changer transitions 0/408 dead transitions. [2020-10-16 00:02:46,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 408 transitions, 17742 flow [2020-10-16 00:02:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 00:02:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 00:02:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2159 transitions. [2020-10-16 00:02:46,008 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6746875 [2020-10-16 00:02:46,008 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2159 transitions. [2020-10-16 00:02:46,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2159 transitions. [2020-10-16 00:02:46,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:46,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2159 transitions. [2020-10-16 00:02:46,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 00:02:46,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 00:02:46,011 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 00:02:46,011 INFO L185 Difference]: Start difference. First operand has 549 places, 370 transitions, 14163 flow. Second operand 32 states and 2159 transitions. [2020-10-16 00:02:46,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 408 transitions, 17742 flow [2020-10-16 00:02:46,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 408 transitions, 17005 flow, removed 102 selfloop flow, removed 29 redundant places. [2020-10-16 00:02:46,955 INFO L241 Difference]: Finished difference. Result has 556 places, 379 transitions, 14667 flow [2020-10-16 00:02:46,955 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=13492, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14667, PETRI_PLACES=556, PETRI_TRANSITIONS=379} [2020-10-16 00:02:46,955 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 538 predicate places. [2020-10-16 00:02:46,955 INFO L481 AbstractCegarLoop]: Abstraction has has 556 places, 379 transitions, 14667 flow [2020-10-16 00:02:46,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 00:02:46,955 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:46,956 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:47,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:47,156 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1082689330, now seen corresponding path program 87 times [2020-10-16 00:02:47,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:47,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652366341] [2020-10-16 00:02:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:47,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652366341] [2020-10-16 00:02:47,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448155841] [2020-10-16 00:02:47,625 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:47,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 00:02:47,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:47,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:02:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:47,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:47,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 00:02:47,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955824407] [2020-10-16 00:02:47,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 00:02:47,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:47,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 00:02:47,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 00:02:47,773 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:47,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 379 transitions, 14667 flow. Second operand 21 states. [2020-10-16 00:02:47,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:47,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:47,775 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:49,464 INFO L129 PetriNetUnfolder]: 359/982 cut-off events. [2020-10-16 00:02:49,464 INFO L130 PetriNetUnfolder]: For 201276/201282 co-relation queries the response was YES. [2020-10-16 00:02:49,483 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21415 conditions, 982 events. 359/982 cut-off events. For 201276/201282 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6048 event pairs, 0 based on Foata normal form. 8/990 useless extension candidates. Maximal degree in co-relation 21167. Up to 609 conditions per place. [2020-10-16 00:02:49,494 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 61 selfloop transitions, 344 changer transitions 0/412 dead transitions. [2020-10-16 00:02:49,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 412 transitions, 18211 flow [2020-10-16 00:02:49,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 00:02:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 00:02:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2363 transitions. [2020-10-16 00:02:49,500 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751428571428572 [2020-10-16 00:02:49,500 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2363 transitions. [2020-10-16 00:02:49,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2363 transitions. [2020-10-16 00:02:49,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:49,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2363 transitions. [2020-10-16 00:02:49,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 00:02:49,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 00:02:49,504 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 00:02:49,504 INFO L185 Difference]: Start difference. First operand has 556 places, 379 transitions, 14667 flow. Second operand 35 states and 2363 transitions. [2020-10-16 00:02:49,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 412 transitions, 18211 flow [2020-10-16 00:02:50,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 412 transitions, 17559 flow, removed 108 selfloop flow, removed 26 redundant places. [2020-10-16 00:02:50,502 INFO L241 Difference]: Finished difference. Result has 566 places, 381 transitions, 15027 flow [2020-10-16 00:02:50,502 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=14081, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15027, PETRI_PLACES=566, PETRI_TRANSITIONS=381} [2020-10-16 00:02:50,502 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 548 predicate places. [2020-10-16 00:02:50,502 INFO L481 AbstractCegarLoop]: Abstraction has has 566 places, 381 transitions, 15027 flow [2020-10-16 00:02:50,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 00:02:50,503 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:50,503 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:50,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 00:02:50,703 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:50,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1082182480, now seen corresponding path program 88 times [2020-10-16 00:02:50,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:50,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875707791] [2020-10-16 00:02:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:50,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875707791] [2020-10-16 00:02:50,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402881647] [2020-10-16 00:02:50,889 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:50,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:02:50,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:50,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:50,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:50,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:02:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:50,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:50,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 00:02:50,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209879332] [2020-10-16 00:02:50,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 00:02:50,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 00:02:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-16 00:02:50,981 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:50,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 381 transitions, 15027 flow. Second operand 21 states. [2020-10-16 00:02:50,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:50,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:50,982 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:52,534 INFO L129 PetriNetUnfolder]: 363/992 cut-off events. [2020-10-16 00:02:52,534 INFO L130 PetriNetUnfolder]: For 203857/203859 co-relation queries the response was YES. [2020-10-16 00:02:52,765 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21804 conditions, 992 events. 363/992 cut-off events. For 203857/203859 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6106 event pairs, 0 based on Foata normal form. 4/996 useless extension candidates. Maximal degree in co-relation 21554. Up to 615 conditions per place. [2020-10-16 00:02:52,777 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 51 selfloop transitions, 360 changer transitions 0/418 dead transitions. [2020-10-16 00:02:52,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 418 transitions, 18887 flow [2020-10-16 00:02:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 00:02:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 00:02:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2499 transitions. [2020-10-16 00:02:52,779 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754054054054054 [2020-10-16 00:02:52,779 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2499 transitions. [2020-10-16 00:02:52,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2499 transitions. [2020-10-16 00:02:52,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:52,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2499 transitions. [2020-10-16 00:02:52,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 00:02:52,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 00:02:52,783 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 00:02:52,783 INFO L185 Difference]: Start difference. First operand has 566 places, 381 transitions, 15027 flow. Second operand 37 states and 2499 transitions. [2020-10-16 00:02:52,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 418 transitions, 18887 flow [2020-10-16 00:02:53,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 418 transitions, 18053 flow, removed 107 selfloop flow, removed 33 redundant places. [2020-10-16 00:02:53,602 INFO L241 Difference]: Finished difference. Result has 572 places, 385 transitions, 15402 flow [2020-10-16 00:02:53,603 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=14265, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=15402, PETRI_PLACES=572, PETRI_TRANSITIONS=385} [2020-10-16 00:02:53,603 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 554 predicate places. [2020-10-16 00:02:53,603 INFO L481 AbstractCegarLoop]: Abstraction has has 572 places, 385 transitions, 15402 flow [2020-10-16 00:02:53,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 00:02:53,603 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:53,603 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:53,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:53,819 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:53,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:53,819 INFO L82 PathProgramCache]: Analyzing trace with hash -227271742, now seen corresponding path program 89 times [2020-10-16 00:02:53,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:53,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710998516] [2020-10-16 00:02:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:54,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710998516] [2020-10-16 00:02:54,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406111522] [2020-10-16 00:02:54,009 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:54,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 00:02:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 00:02:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:54,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:02:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:54,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:54,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 00:02:54,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185626053] [2020-10-16 00:02:54,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 00:02:54,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:54,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 00:02:54,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-16 00:02:54,118 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:54,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 385 transitions, 15402 flow. Second operand 21 states. [2020-10-16 00:02:54,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:54,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:54,119 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:55,580 INFO L129 PetriNetUnfolder]: 366/997 cut-off events. [2020-10-16 00:02:55,580 INFO L130 PetriNetUnfolder]: For 210052/210058 co-relation queries the response was YES. [2020-10-16 00:02:55,599 INFO L80 FinitePrefix]: Finished finitePrefix Result has 22218 conditions, 997 events. 366/997 cut-off events. For 210052/210058 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6152 event pairs, 0 based on Foata normal form. 7/1004 useless extension candidates. Maximal degree in co-relation 21965. Up to 619 conditions per place. [2020-10-16 00:02:55,610 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 101 selfloop transitions, 312 changer transitions 0/420 dead transitions. [2020-10-16 00:02:55,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 420 transitions, 19154 flow [2020-10-16 00:02:55,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 00:02:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 00:02:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2431 transitions. [2020-10-16 00:02:55,613 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752777777777778 [2020-10-16 00:02:55,613 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2431 transitions. [2020-10-16 00:02:55,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2431 transitions. [2020-10-16 00:02:55,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:55,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2431 transitions. [2020-10-16 00:02:55,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 00:02:55,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 00:02:55,616 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 00:02:55,616 INFO L185 Difference]: Start difference. First operand has 572 places, 385 transitions, 15402 flow. Second operand 36 states and 2431 transitions. [2020-10-16 00:02:55,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 420 transitions, 19154 flow [2020-10-16 00:02:56,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 420 transitions, 18287 flow, removed 130 selfloop flow, removed 32 redundant places. [2020-10-16 00:02:56,522 INFO L241 Difference]: Finished difference. Result has 577 places, 388 transitions, 15499 flow [2020-10-16 00:02:56,522 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=14571, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=15499, PETRI_PLACES=577, PETRI_TRANSITIONS=388} [2020-10-16 00:02:56,523 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 559 predicate places. [2020-10-16 00:02:56,523 INFO L481 AbstractCegarLoop]: Abstraction has has 577 places, 388 transitions, 15499 flow [2020-10-16 00:02:56,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 00:02:56,523 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:02:56,523 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:02:56,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:56,724 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:02:56,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:02:56,724 INFO L82 PathProgramCache]: Analyzing trace with hash 812097795, now seen corresponding path program 90 times [2020-10-16 00:02:56,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:02:56,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617667509] [2020-10-16 00:02:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:02:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:02:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:56,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617667509] [2020-10-16 00:02:56,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44355361] [2020-10-16 00:02:56,938 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:02:56,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 00:02:56,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:02:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 00:02:56,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:02:57,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:02:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:02:57,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:02:57,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 00:02:57,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472779611] [2020-10-16 00:02:57,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 00:02:57,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:02:57,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 00:02:57,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-16 00:02:57,038 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:02:57,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 388 transitions, 15499 flow. Second operand 22 states. [2020-10-16 00:02:57,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:02:57,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:02:57,039 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:02:58,226 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2020-10-16 00:02:58,983 INFO L129 PetriNetUnfolder]: 369/1005 cut-off events. [2020-10-16 00:02:58,983 INFO L130 PetriNetUnfolder]: For 216536/216542 co-relation queries the response was YES. [2020-10-16 00:02:59,002 INFO L80 FinitePrefix]: Finished finitePrefix Result has 22503 conditions, 1005 events. 369/1005 cut-off events. For 216536/216542 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6219 event pairs, 0 based on Foata normal form. 4/1009 useless extension candidates. Maximal degree in co-relation 22248. Up to 623 conditions per place. [2020-10-16 00:02:59,014 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 54 selfloop transitions, 364 changer transitions 0/425 dead transitions. [2020-10-16 00:02:59,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 425 transitions, 19459 flow [2020-10-16 00:02:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 00:02:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 00:02:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2431 transitions. [2020-10-16 00:02:59,016 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752777777777778 [2020-10-16 00:02:59,016 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2431 transitions. [2020-10-16 00:02:59,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2431 transitions. [2020-10-16 00:02:59,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:02:59,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2431 transitions. [2020-10-16 00:02:59,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 00:02:59,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 00:02:59,020 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 00:02:59,020 INFO L185 Difference]: Start difference. First operand has 577 places, 388 transitions, 15499 flow. Second operand 36 states and 2431 transitions. [2020-10-16 00:02:59,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 425 transitions, 19459 flow [2020-10-16 00:03:00,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 425 transitions, 18673 flow, removed 103 selfloop flow, removed 36 redundant places. [2020-10-16 00:03:00,026 INFO L241 Difference]: Finished difference. Result has 578 places, 391 transitions, 15787 flow [2020-10-16 00:03:00,027 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=14749, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=15787, PETRI_PLACES=578, PETRI_TRANSITIONS=391} [2020-10-16 00:03:00,027 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 560 predicate places. [2020-10-16 00:03:00,027 INFO L481 AbstractCegarLoop]: Abstraction has has 578 places, 391 transitions, 15787 flow [2020-10-16 00:03:00,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 00:03:00,027 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:00,027 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:00,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:00,228 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:00,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1168108432, now seen corresponding path program 91 times [2020-10-16 00:03:00,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:00,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302823204] [2020-10-16 00:03:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:00,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302823204] [2020-10-16 00:03:00,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575025677] [2020-10-16 00:03:00,500 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:00,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 00:03:00,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:00,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:00,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 00:03:00,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717166328] [2020-10-16 00:03:00,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 00:03:00,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:00,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 00:03:00,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-16 00:03:00,561 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:00,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 391 transitions, 15787 flow. Second operand 21 states. [2020-10-16 00:03:00,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:00,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:00,561 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:01,482 INFO L129 PetriNetUnfolder]: 371/1011 cut-off events. [2020-10-16 00:03:01,482 INFO L130 PetriNetUnfolder]: For 224611/224617 co-relation queries the response was YES. [2020-10-16 00:03:01,504 INFO L80 FinitePrefix]: Finished finitePrefix Result has 22817 conditions, 1011 events. 371/1011 cut-off events. For 224611/224617 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6252 event pairs, 0 based on Foata normal form. 8/1019 useless extension candidates. Maximal degree in co-relation 22560. Up to 660 conditions per place. [2020-10-16 00:03:01,516 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 376 selfloop transitions, 29 changer transitions 0/412 dead transitions. [2020-10-16 00:03:01,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 412 transitions, 18411 flow [2020-10-16 00:03:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 00:03:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 00:03:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1478 transitions. [2020-10-16 00:03:01,518 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6718181818181819 [2020-10-16 00:03:01,518 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1478 transitions. [2020-10-16 00:03:01,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1478 transitions. [2020-10-16 00:03:01,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:01,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1478 transitions. [2020-10-16 00:03:01,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 00:03:01,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 00:03:01,520 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 00:03:01,520 INFO L185 Difference]: Start difference. First operand has 578 places, 391 transitions, 15787 flow. Second operand 22 states and 1478 transitions. [2020-10-16 00:03:01,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 412 transitions, 18411 flow [2020-10-16 00:03:02,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 412 transitions, 17571 flow, removed 88 selfloop flow, removed 32 redundant places. [2020-10-16 00:03:02,569 INFO L241 Difference]: Finished difference. Result has 569 places, 393 transitions, 15189 flow [2020-10-16 00:03:02,569 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=14947, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15189, PETRI_PLACES=569, PETRI_TRANSITIONS=393} [2020-10-16 00:03:02,569 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 551 predicate places. [2020-10-16 00:03:02,570 INFO L481 AbstractCegarLoop]: Abstraction has has 569 places, 393 transitions, 15189 flow [2020-10-16 00:03:02,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 00:03:02,570 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:02,570 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:02,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:02,771 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:02,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:02,771 INFO L82 PathProgramCache]: Analyzing trace with hash 849564896, now seen corresponding path program 92 times [2020-10-16 00:03:02,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:02,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941343023] [2020-10-16 00:03:02,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:03,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941343023] [2020-10-16 00:03:03,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604252166] [2020-10-16 00:03:03,030 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:03,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:03:03,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 00:03:03,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:03,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:03,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 00:03:03,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912198860] [2020-10-16 00:03:03,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 00:03:03,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 00:03:03,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-16 00:03:03,096 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:03,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 393 transitions, 15189 flow. Second operand 21 states. [2020-10-16 00:03:03,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:03,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:03,097 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:04,170 INFO L129 PetriNetUnfolder]: 373/1016 cut-off events. [2020-10-16 00:03:04,171 INFO L130 PetriNetUnfolder]: For 236705/236707 co-relation queries the response was YES. [2020-10-16 00:03:04,190 INFO L80 FinitePrefix]: Finished finitePrefix Result has 22932 conditions, 1016 events. 373/1016 cut-off events. For 236705/236707 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6267 event pairs, 0 based on Foata normal form. 4/1020 useless extension candidates. Maximal degree in co-relation 22673. Up to 631 conditions per place. [2020-10-16 00:03:04,202 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 342 selfloop transitions, 67 changer transitions 0/416 dead transitions. [2020-10-16 00:03:04,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 416 transitions, 18039 flow [2020-10-16 00:03:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 00:03:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 00:03:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1749 transitions. [2020-10-16 00:03:04,204 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6726923076923077 [2020-10-16 00:03:04,204 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1749 transitions. [2020-10-16 00:03:04,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1749 transitions. [2020-10-16 00:03:04,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:04,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1749 transitions. [2020-10-16 00:03:04,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 00:03:04,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 00:03:04,208 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 00:03:04,208 INFO L185 Difference]: Start difference. First operand has 569 places, 393 transitions, 15189 flow. Second operand 26 states and 1749 transitions. [2020-10-16 00:03:04,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 416 transitions, 18039 flow [2020-10-16 00:03:05,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 416 transitions, 17817 flow, removed 84 selfloop flow, removed 19 redundant places. [2020-10-16 00:03:05,252 INFO L241 Difference]: Finished difference. Result has 577 places, 395 transitions, 15316 flow [2020-10-16 00:03:05,253 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=14991, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15316, PETRI_PLACES=577, PETRI_TRANSITIONS=395} [2020-10-16 00:03:05,253 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 559 predicate places. [2020-10-16 00:03:05,253 INFO L481 AbstractCegarLoop]: Abstraction has has 577 places, 395 transitions, 15316 flow [2020-10-16 00:03:05,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 00:03:05,253 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:05,253 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:05,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:05,454 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:05,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:05,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1517901494, now seen corresponding path program 93 times [2020-10-16 00:03:05,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:05,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195293150] [2020-10-16 00:03:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:05,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195293150] [2020-10-16 00:03:05,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413537709] [2020-10-16 00:03:05,671 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:05,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 00:03:05,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:05,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 00:03:05,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:05,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:05,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 00:03:05,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317121156] [2020-10-16 00:03:05,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 00:03:05,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:05,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 00:03:05,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-16 00:03:05,746 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:05,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 395 transitions, 15316 flow. Second operand 21 states. [2020-10-16 00:03:05,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:05,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:05,746 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:07,036 INFO L129 PetriNetUnfolder]: 375/1022 cut-off events. [2020-10-16 00:03:07,036 INFO L130 PetriNetUnfolder]: For 244020/244022 co-relation queries the response was YES. [2020-10-16 00:03:07,056 INFO L80 FinitePrefix]: Finished finitePrefix Result has 23270 conditions, 1022 events. 375/1022 cut-off events. For 244020/244022 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6289 event pairs, 0 based on Foata normal form. 4/1026 useless extension candidates. Maximal degree in co-relation 23009. Up to 635 conditions per place. [2020-10-16 00:03:07,068 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 115 selfloop transitions, 306 changer transitions 0/428 dead transitions. [2020-10-16 00:03:07,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 428 transitions, 19102 flow [2020-10-16 00:03:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 00:03:07,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 00:03:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2429 transitions. [2020-10-16 00:03:07,071 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6747222222222222 [2020-10-16 00:03:07,071 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2429 transitions. [2020-10-16 00:03:07,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2429 transitions. [2020-10-16 00:03:07,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:07,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2429 transitions. [2020-10-16 00:03:07,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 00:03:07,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 00:03:07,074 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 00:03:07,074 INFO L185 Difference]: Start difference. First operand has 577 places, 395 transitions, 15316 flow. Second operand 36 states and 2429 transitions. [2020-10-16 00:03:07,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 428 transitions, 19102 flow [2020-10-16 00:03:08,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 428 transitions, 18821 flow, removed 106 selfloop flow, removed 14 redundant places. [2020-10-16 00:03:08,273 INFO L241 Difference]: Finished difference. Result has 600 places, 397 transitions, 15948 flow [2020-10-16 00:03:08,274 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=15101, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=15948, PETRI_PLACES=600, PETRI_TRANSITIONS=397} [2020-10-16 00:03:08,274 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 582 predicate places. [2020-10-16 00:03:08,274 INFO L481 AbstractCegarLoop]: Abstraction has has 600 places, 397 transitions, 15948 flow [2020-10-16 00:03:08,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 00:03:08,274 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:08,274 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:08,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:08,475 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:08,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:08,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1056938158, now seen corresponding path program 94 times [2020-10-16 00:03:08,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:08,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908922209] [2020-10-16 00:03:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:08,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908922209] [2020-10-16 00:03:08,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066087572] [2020-10-16 00:03:08,689 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:08,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:03:08,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:08,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 00:03:08,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:08,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:03:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:08,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:08,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 00:03:08,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353510644] [2020-10-16 00:03:08,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 00:03:08,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:08,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 00:03:08,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 00:03:08,780 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:08,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 397 transitions, 15948 flow. Second operand 22 states. [2020-10-16 00:03:08,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:08,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:08,781 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:10,304 INFO L129 PetriNetUnfolder]: 377/1028 cut-off events. [2020-10-16 00:03:10,304 INFO L130 PetriNetUnfolder]: For 244893/244899 co-relation queries the response was YES. [2020-10-16 00:03:10,325 INFO L80 FinitePrefix]: Finished finitePrefix Result has 23680 conditions, 1028 events. 377/1028 cut-off events. For 244893/244899 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6321 event pairs, 0 based on Foata normal form. 8/1036 useless extension candidates. Maximal degree in co-relation 23417. Up to 639 conditions per place. [2020-10-16 00:03:10,337 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 109 selfloop transitions, 314 changer transitions 0/430 dead transitions. [2020-10-16 00:03:10,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 430 transitions, 19738 flow [2020-10-16 00:03:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 00:03:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 00:03:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2362 transitions. [2020-10-16 00:03:10,339 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748571428571428 [2020-10-16 00:03:10,339 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2362 transitions. [2020-10-16 00:03:10,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2362 transitions. [2020-10-16 00:03:10,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:10,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2362 transitions. [2020-10-16 00:03:10,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 00:03:10,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 00:03:10,342 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 00:03:10,342 INFO L185 Difference]: Start difference. First operand has 600 places, 397 transitions, 15948 flow. Second operand 35 states and 2362 transitions. [2020-10-16 00:03:10,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 430 transitions, 19738 flow [2020-10-16 00:03:11,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 430 transitions, 18939 flow, removed 120 selfloop flow, removed 33 redundant places. [2020-10-16 00:03:11,541 INFO L241 Difference]: Finished difference. Result has 603 places, 399 transitions, 16086 flow [2020-10-16 00:03:11,542 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=15215, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16086, PETRI_PLACES=603, PETRI_TRANSITIONS=399} [2020-10-16 00:03:11,542 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 585 predicate places. [2020-10-16 00:03:11,542 INFO L481 AbstractCegarLoop]: Abstraction has has 603 places, 399 transitions, 16086 flow [2020-10-16 00:03:11,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 00:03:11,542 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:11,542 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:11,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-16 00:03:11,743 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:11,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:11,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1544511118, now seen corresponding path program 95 times [2020-10-16 00:03:11,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:11,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916011105] [2020-10-16 00:03:11,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:11,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916011105] [2020-10-16 00:03:11,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329397460] [2020-10-16 00:03:11,939 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:11,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 00:03:11,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 00:03:11,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:12,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:12,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 00:03:12,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019591969] [2020-10-16 00:03:12,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 00:03:12,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:12,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 00:03:12,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-16 00:03:12,018 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:12,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 399 transitions, 16086 flow. Second operand 21 states. [2020-10-16 00:03:12,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:12,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:12,019 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:13,468 INFO L129 PetriNetUnfolder]: 388/1055 cut-off events. [2020-10-16 00:03:13,468 INFO L130 PetriNetUnfolder]: For 252940/252946 co-relation queries the response was YES. [2020-10-16 00:03:13,490 INFO L80 FinitePrefix]: Finished finitePrefix Result has 24506 conditions, 1055 events. 388/1055 cut-off events. For 252940/252946 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6483 event pairs, 0 based on Foata normal form. 8/1063 useless extension candidates. Maximal degree in co-relation 24241. Up to 657 conditions per place. [2020-10-16 00:03:13,503 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 83 selfloop transitions, 353 changer transitions 0/443 dead transitions. [2020-10-16 00:03:13,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 443 transitions, 20728 flow [2020-10-16 00:03:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 00:03:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 00:03:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2702 transitions. [2020-10-16 00:03:13,505 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 00:03:13,505 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2702 transitions. [2020-10-16 00:03:13,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2702 transitions. [2020-10-16 00:03:13,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:13,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2702 transitions. [2020-10-16 00:03:13,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 00:03:13,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 00:03:13,509 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 00:03:13,509 INFO L185 Difference]: Start difference. First operand has 603 places, 399 transitions, 16086 flow. Second operand 40 states and 2702 transitions. [2020-10-16 00:03:13,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 443 transitions, 20728 flow [2020-10-16 00:03:14,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 443 transitions, 19931 flow, removed 115 selfloop flow, removed 32 redundant places. [2020-10-16 00:03:14,679 INFO L241 Difference]: Finished difference. Result has 614 places, 407 transitions, 16732 flow [2020-10-16 00:03:14,680 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=15373, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=16732, PETRI_PLACES=614, PETRI_TRANSITIONS=407} [2020-10-16 00:03:14,680 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 596 predicate places. [2020-10-16 00:03:14,680 INFO L481 AbstractCegarLoop]: Abstraction has has 614 places, 407 transitions, 16732 flow [2020-10-16 00:03:14,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 00:03:14,680 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:14,680 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:14,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:14,881 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:14,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1544527858, now seen corresponding path program 96 times [2020-10-16 00:03:14,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:14,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38158237] [2020-10-16 00:03:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:15,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38158237] [2020-10-16 00:03:15,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425511583] [2020-10-16 00:03:15,137 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:15,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 00:03:15,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:15,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 00:03:15,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:15,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:03:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:15,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:15,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 00:03:15,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436208849] [2020-10-16 00:03:15,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 00:03:15,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:15,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 00:03:15,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 00:03:15,246 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:15,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 407 transitions, 16732 flow. Second operand 22 states. [2020-10-16 00:03:15,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:15,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:15,247 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:17,043 INFO L129 PetriNetUnfolder]: 385/1049 cut-off events. [2020-10-16 00:03:17,044 INFO L130 PetriNetUnfolder]: For 268500/268502 co-relation queries the response was YES. [2020-10-16 00:03:17,065 INFO L80 FinitePrefix]: Finished finitePrefix Result has 24839 conditions, 1049 events. 385/1049 cut-off events. For 268500/268502 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6379 event pairs, 0 based on Foata normal form. 4/1053 useless extension candidates. Maximal degree in co-relation 24570. Up to 653 conditions per place. [2020-10-16 00:03:17,078 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 82 selfloop transitions, 354 changer transitions 0/443 dead transitions. [2020-10-16 00:03:17,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 443 transitions, 20928 flow [2020-10-16 00:03:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 00:03:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 00:03:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2634 transitions. [2020-10-16 00:03:17,081 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753846153846154 [2020-10-16 00:03:17,081 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2634 transitions. [2020-10-16 00:03:17,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2634 transitions. [2020-10-16 00:03:17,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:17,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2634 transitions. [2020-10-16 00:03:17,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-16 00:03:17,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-16 00:03:17,084 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-16 00:03:17,084 INFO L185 Difference]: Start difference. First operand has 614 places, 407 transitions, 16732 flow. Second operand 39 states and 2634 transitions. [2020-10-16 00:03:17,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 443 transitions, 20928 flow [2020-10-16 00:03:18,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 443 transitions, 19887 flow, removed 213 selfloop flow, removed 35 redundant places. [2020-10-16 00:03:18,175 INFO L241 Difference]: Finished difference. Result has 619 places, 408 transitions, 16590 flow [2020-10-16 00:03:18,175 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=15691, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=16590, PETRI_PLACES=619, PETRI_TRANSITIONS=408} [2020-10-16 00:03:18,176 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 601 predicate places. [2020-10-16 00:03:18,176 INFO L481 AbstractCegarLoop]: Abstraction has has 619 places, 408 transitions, 16590 flow [2020-10-16 00:03:18,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 00:03:18,176 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:18,176 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:18,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-16 00:03:18,391 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:18,391 INFO L82 PathProgramCache]: Analyzing trace with hash 376305371, now seen corresponding path program 97 times [2020-10-16 00:03:18,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:18,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156506424] [2020-10-16 00:03:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:18,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156506424] [2020-10-16 00:03:18,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425921553] [2020-10-16 00:03:18,700 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:18,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:18,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:18,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 00:03:18,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933868416] [2020-10-16 00:03:18,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 00:03:18,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:18,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 00:03:18,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 00:03:18,763 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:18,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 408 transitions, 16590 flow. Second operand 22 states. [2020-10-16 00:03:18,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:18,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:18,764 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:19,828 INFO L129 PetriNetUnfolder]: 387/1055 cut-off events. [2020-10-16 00:03:19,828 INFO L130 PetriNetUnfolder]: For 275599/275601 co-relation queries the response was YES. [2020-10-16 00:03:19,850 INFO L80 FinitePrefix]: Finished finitePrefix Result has 25014 conditions, 1055 events. 387/1055 cut-off events. For 275599/275601 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6520 event pairs, 0 based on Foata normal form. 2/1057 useless extension candidates. Maximal degree in co-relation 24743. Up to 653 conditions per place. [2020-10-16 00:03:19,863 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 360 selfloop transitions, 64 changer transitions 0/431 dead transitions. [2020-10-16 00:03:19,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 431 transitions, 19570 flow [2020-10-16 00:03:19,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 00:03:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 00:03:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1613 transitions. [2020-10-16 00:03:19,865 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6720833333333334 [2020-10-16 00:03:19,865 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1613 transitions. [2020-10-16 00:03:19,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1613 transitions. [2020-10-16 00:03:19,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:19,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1613 transitions. [2020-10-16 00:03:19,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 00:03:19,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 00:03:19,868 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 00:03:19,868 INFO L185 Difference]: Start difference. First operand has 619 places, 408 transitions, 16590 flow. Second operand 24 states and 1613 transitions. [2020-10-16 00:03:19,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 431 transitions, 19570 flow [2020-10-16 00:03:20,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 431 transitions, 18748 flow, removed 79 selfloop flow, removed 36 redundant places. [2020-10-16 00:03:20,981 INFO L241 Difference]: Finished difference. Result has 608 places, 410 transitions, 16160 flow [2020-10-16 00:03:20,981 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=15836, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=16160, PETRI_PLACES=608, PETRI_TRANSITIONS=410} [2020-10-16 00:03:20,982 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 590 predicate places. [2020-10-16 00:03:20,982 INFO L481 AbstractCegarLoop]: Abstraction has has 608 places, 410 transitions, 16160 flow [2020-10-16 00:03:20,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 00:03:20,982 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:20,982 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:21,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:21,183 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:21,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:21,183 INFO L82 PathProgramCache]: Analyzing trace with hash 642170241, now seen corresponding path program 98 times [2020-10-16 00:03:21,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:21,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034572204] [2020-10-16 00:03:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:21,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034572204] [2020-10-16 00:03:21,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18819382] [2020-10-16 00:03:21,495 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:21,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:03:21,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:21,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:21,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:21,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:03:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:21,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:21,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 00:03:21,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384412776] [2020-10-16 00:03:21,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 00:03:21,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:21,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 00:03:21,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 00:03:21,593 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:21,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 410 transitions, 16160 flow. Second operand 23 states. [2020-10-16 00:03:21,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:21,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:21,595 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:22,697 INFO L129 PetriNetUnfolder]: 391/1067 cut-off events. [2020-10-16 00:03:22,697 INFO L130 PetriNetUnfolder]: For 272673/272679 co-relation queries the response was YES. [2020-10-16 00:03:22,719 INFO L80 FinitePrefix]: Finished finitePrefix Result has 24879 conditions, 1067 events. 391/1067 cut-off events. For 272673/272679 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6574 event pairs, 0 based on Foata normal form. 8/1075 useless extension candidates. Maximal degree in co-relation 24606. Up to 661 conditions per place. [2020-10-16 00:03:22,732 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 330 selfloop transitions, 98 changer transitions 0/435 dead transitions. [2020-10-16 00:03:22,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 435 transitions, 19191 flow [2020-10-16 00:03:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 00:03:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 00:03:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1681 transitions. [2020-10-16 00:03:22,734 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6724 [2020-10-16 00:03:22,734 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1681 transitions. [2020-10-16 00:03:22,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1681 transitions. [2020-10-16 00:03:22,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:22,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1681 transitions. [2020-10-16 00:03:22,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 00:03:22,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 00:03:22,736 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 00:03:22,736 INFO L185 Difference]: Start difference. First operand has 608 places, 410 transitions, 16160 flow. Second operand 25 states and 1681 transitions. [2020-10-16 00:03:22,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 435 transitions, 19191 flow [2020-10-16 00:03:23,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 435 transitions, 18897 flow, removed 84 selfloop flow, removed 22 redundant places. [2020-10-16 00:03:23,800 INFO L241 Difference]: Finished difference. Result has 612 places, 414 transitions, 16359 flow [2020-10-16 00:03:23,801 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=15888, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=16359, PETRI_PLACES=612, PETRI_TRANSITIONS=414} [2020-10-16 00:03:23,801 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 594 predicate places. [2020-10-16 00:03:23,801 INFO L481 AbstractCegarLoop]: Abstraction has has 612 places, 414 transitions, 16359 flow [2020-10-16 00:03:23,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 00:03:23,801 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:23,801 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:24,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:24,008 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:24,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1093214603, now seen corresponding path program 99 times [2020-10-16 00:03:24,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:24,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823759742] [2020-10-16 00:03:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:24,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823759742] [2020-10-16 00:03:24,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292712138] [2020-10-16 00:03:24,302 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:24,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 00:03:24,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:24,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:24,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:24,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 00:03:24,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659367823] [2020-10-16 00:03:24,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 00:03:24,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:24,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 00:03:24,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 00:03:24,373 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:24,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 414 transitions, 16359 flow. Second operand 22 states. [2020-10-16 00:03:24,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:24,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:24,374 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:25,531 INFO L129 PetriNetUnfolder]: 393/1073 cut-off events. [2020-10-16 00:03:25,532 INFO L130 PetriNetUnfolder]: For 281513/281515 co-relation queries the response was YES. [2020-10-16 00:03:25,554 INFO L80 FinitePrefix]: Finished finitePrefix Result has 25234 conditions, 1073 events. 393/1073 cut-off events. For 281513/281515 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6623 event pairs, 0 based on Foata normal form. 2/1075 useless extension candidates. Maximal degree in co-relation 24959. Up to 665 conditions per place. [2020-10-16 00:03:25,567 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 290 selfloop transitions, 142 changer transitions 0/439 dead transitions. [2020-10-16 00:03:25,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 439 transitions, 19543 flow [2020-10-16 00:03:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 00:03:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 00:03:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1749 transitions. [2020-10-16 00:03:25,569 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6726923076923077 [2020-10-16 00:03:25,569 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1749 transitions. [2020-10-16 00:03:25,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1749 transitions. [2020-10-16 00:03:25,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:25,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1749 transitions. [2020-10-16 00:03:25,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 00:03:25,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 00:03:25,571 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 00:03:25,572 INFO L185 Difference]: Start difference. First operand has 612 places, 414 transitions, 16359 flow. Second operand 26 states and 1749 transitions. [2020-10-16 00:03:25,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 439 transitions, 19543 flow [2020-10-16 00:03:26,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 439 transitions, 19163 flow, removed 100 selfloop flow, removed 22 redundant places. [2020-10-16 00:03:26,700 INFO L241 Difference]: Finished difference. Result has 617 places, 416 transitions, 16527 flow [2020-10-16 00:03:26,700 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=16029, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=16527, PETRI_PLACES=617, PETRI_TRANSITIONS=416} [2020-10-16 00:03:26,701 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 599 predicate places. [2020-10-16 00:03:26,701 INFO L481 AbstractCegarLoop]: Abstraction has has 617 places, 416 transitions, 16527 flow [2020-10-16 00:03:26,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 00:03:26,701 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:26,701 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:26,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 00:03:26,911 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:26,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:26,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1470167581, now seen corresponding path program 100 times [2020-10-16 00:03:26,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:26,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930921439] [2020-10-16 00:03:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:27,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930921439] [2020-10-16 00:03:27,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566518227] [2020-10-16 00:03:27,214 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:27,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:03:27,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:27,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:27,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:27,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:03:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:27,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:27,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 00:03:27,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524417560] [2020-10-16 00:03:27,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 00:03:27,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:27,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 00:03:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-16 00:03:27,302 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:27,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 416 transitions, 16527 flow. Second operand 23 states. [2020-10-16 00:03:27,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:27,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:27,303 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:28,564 INFO L129 PetriNetUnfolder]: 397/1085 cut-off events. [2020-10-16 00:03:28,564 INFO L130 PetriNetUnfolder]: For 284097/284099 co-relation queries the response was YES. [2020-10-16 00:03:28,588 INFO L80 FinitePrefix]: Finished finitePrefix Result has 25550 conditions, 1085 events. 397/1085 cut-off events. For 284097/284099 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6745 event pairs, 0 based on Foata normal form. 4/1089 useless extension candidates. Maximal degree in co-relation 25273. Up to 673 conditions per place. [2020-10-16 00:03:28,601 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 264 selfloop transitions, 172 changer transitions 0/443 dead transitions. [2020-10-16 00:03:28,601 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 443 transitions, 19782 flow [2020-10-16 00:03:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 00:03:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-16 00:03:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1817 transitions. [2020-10-16 00:03:28,603 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.672962962962963 [2020-10-16 00:03:28,603 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1817 transitions. [2020-10-16 00:03:28,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1817 transitions. [2020-10-16 00:03:28,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:28,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1817 transitions. [2020-10-16 00:03:28,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-16 00:03:28,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-16 00:03:28,606 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-16 00:03:28,606 INFO L185 Difference]: Start difference. First operand has 617 places, 416 transitions, 16527 flow. Second operand 27 states and 1817 transitions. [2020-10-16 00:03:28,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 443 transitions, 19782 flow [2020-10-16 00:03:29,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 443 transitions, 19326 flow, removed 98 selfloop flow, removed 23 redundant places. [2020-10-16 00:03:29,735 INFO L241 Difference]: Finished difference. Result has 622 places, 420 transitions, 16754 flow [2020-10-16 00:03:29,736 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=16121, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=16754, PETRI_PLACES=622, PETRI_TRANSITIONS=420} [2020-10-16 00:03:29,736 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 604 predicate places. [2020-10-16 00:03:29,736 INFO L481 AbstractCegarLoop]: Abstraction has has 622 places, 420 transitions, 16754 flow [2020-10-16 00:03:29,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 00:03:29,736 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:29,736 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:29,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 00:03:29,937 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash 516581379, now seen corresponding path program 101 times [2020-10-16 00:03:29,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:29,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712603351] [2020-10-16 00:03:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:30,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712603351] [2020-10-16 00:03:30,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639085051] [2020-10-16 00:03:30,202 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:30,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 00:03:30,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:30,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:30,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:30,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 00:03:30,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154818509] [2020-10-16 00:03:30,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 00:03:30,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:30,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 00:03:30,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 00:03:30,290 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:30,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 420 transitions, 16754 flow. Second operand 22 states. [2020-10-16 00:03:30,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:30,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:30,291 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:31,781 INFO L129 PetriNetUnfolder]: 405/1109 cut-off events. [2020-10-16 00:03:31,781 INFO L130 PetriNetUnfolder]: For 289573/289575 co-relation queries the response was YES. [2020-10-16 00:03:31,804 INFO L80 FinitePrefix]: Finished finitePrefix Result has 26154 conditions, 1109 events. 405/1109 cut-off events. For 289573/289575 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6911 event pairs, 0 based on Foata normal form. 2/1111 useless extension candidates. Maximal degree in co-relation 25875. Up to 689 conditions per place. [2020-10-16 00:03:31,818 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 184 selfloop transitions, 264 changer transitions 0/455 dead transitions. [2020-10-16 00:03:31,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 455 transitions, 20589 flow [2020-10-16 00:03:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 00:03:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-16 00:03:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2021 transitions. [2020-10-16 00:03:31,823 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6736666666666666 [2020-10-16 00:03:31,823 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2021 transitions. [2020-10-16 00:03:31,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2021 transitions. [2020-10-16 00:03:31,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:31,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2021 transitions. [2020-10-16 00:03:31,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-16 00:03:31,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-16 00:03:31,825 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-16 00:03:31,825 INFO L185 Difference]: Start difference. First operand has 622 places, 420 transitions, 16754 flow. Second operand 30 states and 2021 transitions. [2020-10-16 00:03:31,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 455 transitions, 20589 flow [2020-10-16 00:03:33,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 455 transitions, 20061 flow, removed 108 selfloop flow, removed 24 redundant places. [2020-10-16 00:03:33,072 INFO L241 Difference]: Finished difference. Result has 631 places, 428 transitions, 17357 flow [2020-10-16 00:03:33,073 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=16288, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17357, PETRI_PLACES=631, PETRI_TRANSITIONS=428} [2020-10-16 00:03:33,073 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 613 predicate places. [2020-10-16 00:03:33,073 INFO L481 AbstractCegarLoop]: Abstraction has has 631 places, 428 transitions, 17357 flow [2020-10-16 00:03:33,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 00:03:33,073 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:33,073 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:33,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:33,274 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:33,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1141503561, now seen corresponding path program 102 times [2020-10-16 00:03:33,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:33,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345495552] [2020-10-16 00:03:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:33,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345495552] [2020-10-16 00:03:33,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871254156] [2020-10-16 00:03:33,530 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:33,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 00:03:33,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:33,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:33,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:33,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:03:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:33,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:33,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 00:03:33,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886433130] [2020-10-16 00:03:33,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 00:03:33,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:33,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 00:03:33,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-16 00:03:33,627 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:33,627 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 428 transitions, 17357 flow. Second operand 23 states. [2020-10-16 00:03:33,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:33,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:33,628 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:35,448 INFO L129 PetriNetUnfolder]: 409/1121 cut-off events. [2020-10-16 00:03:35,448 INFO L130 PetriNetUnfolder]: For 292583/292585 co-relation queries the response was YES. [2020-10-16 00:03:35,472 INFO L80 FinitePrefix]: Finished finitePrefix Result has 26566 conditions, 1121 events. 409/1121 cut-off events. For 292583/292585 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7002 event pairs, 0 based on Foata normal form. 4/1125 useless extension candidates. Maximal degree in co-relation 26283. Up to 697 conditions per place. [2020-10-16 00:03:35,486 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 136 selfloop transitions, 318 changer transitions 0/461 dead transitions. [2020-10-16 00:03:35,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 461 transitions, 21210 flow [2020-10-16 00:03:35,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 00:03:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-16 00:03:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2225 transitions. [2020-10-16 00:03:35,488 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2020-10-16 00:03:35,488 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2225 transitions. [2020-10-16 00:03:35,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2225 transitions. [2020-10-16 00:03:35,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:35,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2225 transitions. [2020-10-16 00:03:35,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-16 00:03:35,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-16 00:03:35,491 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-16 00:03:35,491 INFO L185 Difference]: Start difference. First operand has 631 places, 428 transitions, 17357 flow. Second operand 33 states and 2225 transitions. [2020-10-16 00:03:35,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 461 transitions, 21210 flow [2020-10-16 00:03:36,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 461 transitions, 20554 flow, removed 112 selfloop flow, removed 25 redundant places. [2020-10-16 00:03:36,912 INFO L241 Difference]: Finished difference. Result has 640 places, 432 transitions, 17713 flow [2020-10-16 00:03:36,913 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=16767, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=17713, PETRI_PLACES=640, PETRI_TRANSITIONS=432} [2020-10-16 00:03:36,913 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 622 predicate places. [2020-10-16 00:03:36,913 INFO L481 AbstractCegarLoop]: Abstraction has has 640 places, 432 transitions, 17713 flow [2020-10-16 00:03:36,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 00:03:36,913 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:36,913 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:37,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 00:03:37,114 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:37,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:37,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1537271225, now seen corresponding path program 103 times [2020-10-16 00:03:37,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:37,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485757481] [2020-10-16 00:03:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:37,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485757481] [2020-10-16 00:03:37,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418941737] [2020-10-16 00:03:37,347 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:37,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:37,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:37,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:37,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 00:03:37,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883109207] [2020-10-16 00:03:37,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 00:03:37,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:37,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 00:03:37,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 00:03:37,416 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:37,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 432 transitions, 17713 flow. Second operand 22 states. [2020-10-16 00:03:37,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:37,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:37,417 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:38,901 INFO L129 PetriNetUnfolder]: 413/1133 cut-off events. [2020-10-16 00:03:38,901 INFO L130 PetriNetUnfolder]: For 295329/295335 co-relation queries the response was YES. [2020-10-16 00:03:38,926 INFO L80 FinitePrefix]: Finished finitePrefix Result has 26944 conditions, 1133 events. 413/1133 cut-off events. For 295329/295335 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7095 event pairs, 0 based on Foata normal form. 5/1138 useless extension candidates. Maximal degree in co-relation 26659. Up to 705 conditions per place. [2020-10-16 00:03:38,940 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 114 selfloop transitions, 346 changer transitions 0/467 dead transitions. [2020-10-16 00:03:38,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 673 places, 467 transitions, 21764 flow [2020-10-16 00:03:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 00:03:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 00:03:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2293 transitions. [2020-10-16 00:03:38,942 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6744117647058824 [2020-10-16 00:03:38,942 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2293 transitions. [2020-10-16 00:03:38,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2293 transitions. [2020-10-16 00:03:38,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:38,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2293 transitions. [2020-10-16 00:03:38,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-16 00:03:38,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-16 00:03:38,945 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-16 00:03:38,945 INFO L185 Difference]: Start difference. First operand has 640 places, 432 transitions, 17713 flow. Second operand 34 states and 2293 transitions. [2020-10-16 00:03:38,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 673 places, 467 transitions, 21764 flow [2020-10-16 00:03:40,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 467 transitions, 21062 flow, removed 112 selfloop flow, removed 27 redundant places. [2020-10-16 00:03:40,436 INFO L241 Difference]: Finished difference. Result has 648 places, 436 transitions, 18091 flow [2020-10-16 00:03:40,437 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=17081, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=18091, PETRI_PLACES=648, PETRI_TRANSITIONS=436} [2020-10-16 00:03:40,437 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 630 predicate places. [2020-10-16 00:03:40,437 INFO L481 AbstractCegarLoop]: Abstraction has has 648 places, 436 transitions, 18091 flow [2020-10-16 00:03:40,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 00:03:40,437 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:40,437 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:40,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:40,645 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:40,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1017528149, now seen corresponding path program 104 times [2020-10-16 00:03:40,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:40,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314286269] [2020-10-16 00:03:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:40,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314286269] [2020-10-16 00:03:40,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854479931] [2020-10-16 00:03:40,888 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:40,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:03:40,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:40,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:40,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:40,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:03:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:40,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:40,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 00:03:40,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038782151] [2020-10-16 00:03:40,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 00:03:40,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:40,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 00:03:40,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-16 00:03:40,981 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:40,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 436 transitions, 18091 flow. Second operand 23 states. [2020-10-16 00:03:40,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:40,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:40,982 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:42,697 INFO L129 PetriNetUnfolder]: 419/1151 cut-off events. [2020-10-16 00:03:42,697 INFO L130 PetriNetUnfolder]: For 299499/299505 co-relation queries the response was YES. [2020-10-16 00:03:42,722 INFO L80 FinitePrefix]: Finished finitePrefix Result has 27461 conditions, 1151 events. 419/1151 cut-off events. For 299499/299505 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7267 event pairs, 0 based on Foata normal form. 8/1159 useless extension candidates. Maximal degree in co-relation 27174. Up to 717 conditions per place. [2020-10-16 00:03:42,736 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 106 selfloop transitions, 360 changer transitions 0/473 dead transitions. [2020-10-16 00:03:42,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 473 transitions, 22210 flow [2020-10-16 00:03:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 00:03:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 00:03:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2361 transitions. [2020-10-16 00:03:42,739 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745714285714286 [2020-10-16 00:03:42,739 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2361 transitions. [2020-10-16 00:03:42,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2361 transitions. [2020-10-16 00:03:42,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:42,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2361 transitions. [2020-10-16 00:03:42,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 00:03:42,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 00:03:42,742 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 00:03:42,742 INFO L185 Difference]: Start difference. First operand has 648 places, 436 transitions, 18091 flow. Second operand 35 states and 2361 transitions. [2020-10-16 00:03:42,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 473 transitions, 22210 flow [2020-10-16 00:03:44,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 473 transitions, 21428 flow, removed 112 selfloop flow, removed 30 redundant places. [2020-10-16 00:03:44,308 INFO L241 Difference]: Finished difference. Result has 656 places, 442 transitions, 18570 flow [2020-10-16 00:03:44,308 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=17379, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18570, PETRI_PLACES=656, PETRI_TRANSITIONS=442} [2020-10-16 00:03:44,308 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 638 predicate places. [2020-10-16 00:03:44,309 INFO L481 AbstractCegarLoop]: Abstraction has has 656 places, 442 transitions, 18570 flow [2020-10-16 00:03:44,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 00:03:44,309 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:44,309 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:44,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 00:03:44,510 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash -885841341, now seen corresponding path program 105 times [2020-10-16 00:03:44,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:44,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039547107] [2020-10-16 00:03:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:44,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039547107] [2020-10-16 00:03:44,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119036061] [2020-10-16 00:03:44,761 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:44,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 00:03:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:44,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:03:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:44,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:44,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 00:03:44,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423085818] [2020-10-16 00:03:44,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 00:03:44,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:44,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 00:03:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 00:03:44,906 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:44,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 442 transitions, 18570 flow. Second operand 23 states. [2020-10-16 00:03:44,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:44,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:44,908 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:46,766 INFO L129 PetriNetUnfolder]: 421/1157 cut-off events. [2020-10-16 00:03:46,766 INFO L130 PetriNetUnfolder]: For 301550/301556 co-relation queries the response was YES. [2020-10-16 00:03:46,793 INFO L80 FinitePrefix]: Finished finitePrefix Result has 27743 conditions, 1157 events. 421/1157 cut-off events. For 301550/301556 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7311 event pairs, 0 based on Foata normal form. 8/1165 useless extension candidates. Maximal degree in co-relation 27452. Up to 721 conditions per place. [2020-10-16 00:03:46,807 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 81 selfloop transitions, 390 changer transitions 0/478 dead transitions. [2020-10-16 00:03:46,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 478 transitions, 22768 flow [2020-10-16 00:03:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 00:03:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 00:03:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2497 transitions. [2020-10-16 00:03:46,809 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748648648648649 [2020-10-16 00:03:46,809 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2497 transitions. [2020-10-16 00:03:46,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2497 transitions. [2020-10-16 00:03:46,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:46,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2497 transitions. [2020-10-16 00:03:46,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 00:03:46,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 00:03:46,812 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 00:03:46,812 INFO L185 Difference]: Start difference. First operand has 656 places, 442 transitions, 18570 flow. Second operand 37 states and 2497 transitions. [2020-10-16 00:03:46,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 478 transitions, 22768 flow [2020-10-16 00:03:48,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 663 places, 478 transitions, 22018 flow, removed 114 selfloop flow, removed 29 redundant places. [2020-10-16 00:03:48,148 INFO L241 Difference]: Finished difference. Result has 665 places, 444 transitions, 18941 flow [2020-10-16 00:03:48,148 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=17890, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18941, PETRI_PLACES=665, PETRI_TRANSITIONS=444} [2020-10-16 00:03:48,148 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 647 predicate places. [2020-10-16 00:03:48,148 INFO L481 AbstractCegarLoop]: Abstraction has has 665 places, 444 transitions, 18941 flow [2020-10-16 00:03:48,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 00:03:48,149 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:48,149 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:48,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:48,349 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:48,350 INFO L82 PathProgramCache]: Analyzing trace with hash -398268381, now seen corresponding path program 106 times [2020-10-16 00:03:48,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:48,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359174435] [2020-10-16 00:03:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:48,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359174435] [2020-10-16 00:03:48,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344872585] [2020-10-16 00:03:48,585 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:48,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:03:48,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:48,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:48,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:48,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:48,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 00:03:48,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55465490] [2020-10-16 00:03:48,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 00:03:48,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:48,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 00:03:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 00:03:48,664 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:48,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 665 places, 444 transitions, 18941 flow. Second operand 22 states. [2020-10-16 00:03:48,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:48,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:48,665 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:50,374 INFO L129 PetriNetUnfolder]: 430/1177 cut-off events. [2020-10-16 00:03:50,375 INFO L130 PetriNetUnfolder]: For 308805/308811 co-relation queries the response was YES. [2020-10-16 00:03:50,401 INFO L80 FinitePrefix]: Finished finitePrefix Result has 28592 conditions, 1177 events. 430/1177 cut-off events. For 308805/308811 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7376 event pairs, 0 based on Foata normal form. 5/1182 useless extension candidates. Maximal degree in co-relation 28299. Up to 735 conditions per place. [2020-10-16 00:03:50,416 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 60 selfloop transitions, 422 changer transitions 0/489 dead transitions. [2020-10-16 00:03:50,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 489 transitions, 23973 flow [2020-10-16 00:03:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 00:03:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 00:03:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2702 transitions. [2020-10-16 00:03:50,418 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 00:03:50,418 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2702 transitions. [2020-10-16 00:03:50,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2702 transitions. [2020-10-16 00:03:50,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:50,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2702 transitions. [2020-10-16 00:03:50,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 00:03:50,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 00:03:50,422 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 00:03:50,423 INFO L185 Difference]: Start difference. First operand has 665 places, 444 transitions, 18941 flow. Second operand 40 states and 2702 transitions. [2020-10-16 00:03:50,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 489 transitions, 23973 flow [2020-10-16 00:03:51,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 489 transitions, 22996 flow, removed 121 selfloop flow, removed 35 redundant places. [2020-10-16 00:03:51,911 INFO L241 Difference]: Finished difference. Result has 673 places, 451 transitions, 19544 flow [2020-10-16 00:03:51,912 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=18052, PETRI_DIFFERENCE_MINUEND_PLACES=630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=19544, PETRI_PLACES=673, PETRI_TRANSITIONS=451} [2020-10-16 00:03:51,912 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 655 predicate places. [2020-10-16 00:03:51,912 INFO L481 AbstractCegarLoop]: Abstraction has has 673 places, 451 transitions, 19544 flow [2020-10-16 00:03:51,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 00:03:51,912 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:51,912 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:52,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 00:03:52,113 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:52,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:52,114 INFO L82 PathProgramCache]: Analyzing trace with hash -398251641, now seen corresponding path program 107 times [2020-10-16 00:03:52,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:52,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41792738] [2020-10-16 00:03:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:52,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41792738] [2020-10-16 00:03:52,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80909044] [2020-10-16 00:03:52,342 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:52,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 00:03:52,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:52,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:52,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:03:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:52,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:52,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 00:03:52,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510362799] [2020-10-16 00:03:52,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 00:03:52,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:52,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 00:03:52,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-16 00:03:52,444 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:52,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 451 transitions, 19544 flow. Second operand 23 states. [2020-10-16 00:03:52,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:52,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:52,445 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:54,400 INFO L129 PetriNetUnfolder]: 427/1172 cut-off events. [2020-10-16 00:03:54,400 INFO L130 PetriNetUnfolder]: For 327898/327900 co-relation queries the response was YES. [2020-10-16 00:03:54,427 INFO L80 FinitePrefix]: Finished finitePrefix Result has 28963 conditions, 1172 events. 427/1172 cut-off events. For 327898/327900 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7423 event pairs, 0 based on Foata normal form. 4/1176 useless extension candidates. Maximal degree in co-relation 28666. Up to 731 conditions per place. [2020-10-16 00:03:54,442 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 58 selfloop transitions, 424 changer transitions 0/489 dead transitions. [2020-10-16 00:03:54,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 489 transitions, 24156 flow [2020-10-16 00:03:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 00:03:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 00:03:54,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2769 transitions. [2020-10-16 00:03:54,445 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753658536585366 [2020-10-16 00:03:54,445 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2769 transitions. [2020-10-16 00:03:54,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2769 transitions. [2020-10-16 00:03:54,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:54,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2769 transitions. [2020-10-16 00:03:54,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-16 00:03:54,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-16 00:03:54,448 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-16 00:03:54,448 INFO L185 Difference]: Start difference. First operand has 673 places, 451 transitions, 19544 flow. Second operand 41 states and 2769 transitions. [2020-10-16 00:03:54,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 489 transitions, 24156 flow [2020-10-16 00:03:56,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 489 transitions, 23004 flow, removed 210 selfloop flow, removed 34 redundant places. [2020-10-16 00:03:56,042 INFO L241 Difference]: Finished difference. Result has 681 places, 452 transitions, 19446 flow [2020-10-16 00:03:56,043 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=18392, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=19446, PETRI_PLACES=681, PETRI_TRANSITIONS=452} [2020-10-16 00:03:56,043 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 663 predicate places. [2020-10-16 00:03:56,043 INFO L481 AbstractCegarLoop]: Abstraction has has 681 places, 452 transitions, 19446 flow [2020-10-16 00:03:56,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 00:03:56,043 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:03:56,043 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:03:56,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 00:03:56,244 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:03:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:03:56,245 INFO L82 PathProgramCache]: Analyzing trace with hash 635739649, now seen corresponding path program 108 times [2020-10-16 00:03:56,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:03:56,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702622953] [2020-10-16 00:03:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:03:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:03:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:56,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702622953] [2020-10-16 00:03:56,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519959649] [2020-10-16 00:03:56,476 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:03:56,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 00:03:56,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:03:56,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 00:03:56,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:03:56,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:03:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:03:56,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:03:56,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 00:03:56,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754982763] [2020-10-16 00:03:56,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 00:03:56,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:03:56,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 00:03:56,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-16 00:03:56,579 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:03:56,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 452 transitions, 19446 flow. Second operand 23 states. [2020-10-16 00:03:56,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:03:56,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:03:56,580 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:03:58,465 INFO L129 PetriNetUnfolder]: 430/1178 cut-off events. [2020-10-16 00:03:58,465 INFO L130 PetriNetUnfolder]: For 336950/336952 co-relation queries the response was YES. [2020-10-16 00:03:58,493 INFO L80 FinitePrefix]: Finished finitePrefix Result has 29267 conditions, 1178 events. 430/1178 cut-off events. For 336950/336952 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7468 event pairs, 0 based on Foata normal form. 3/1181 useless extension candidates. Maximal degree in co-relation 28968. Up to 733 conditions per place. [2020-10-16 00:03:58,508 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 110 selfloop transitions, 374 changer transitions 0/491 dead transitions. [2020-10-16 00:03:58,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 491 transitions, 24180 flow [2020-10-16 00:03:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 00:03:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 00:03:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2701 transitions. [2020-10-16 00:03:58,511 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67525 [2020-10-16 00:03:58,511 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2701 transitions. [2020-10-16 00:03:58,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2701 transitions. [2020-10-16 00:03:58,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:03:58,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2701 transitions. [2020-10-16 00:03:58,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 00:03:58,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 00:03:58,515 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 00:03:58,515 INFO L185 Difference]: Start difference. First operand has 681 places, 452 transitions, 19446 flow. Second operand 40 states and 2701 transitions. [2020-10-16 00:03:58,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 491 transitions, 24180 flow [2020-10-16 00:04:00,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 491 transitions, 23223 flow, removed 103 selfloop flow, removed 39 redundant places. [2020-10-16 00:04:00,215 INFO L241 Difference]: Finished difference. Result has 683 places, 455 transitions, 19687 flow [2020-10-16 00:04:00,215 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=18605, PETRI_DIFFERENCE_MINUEND_PLACES=642, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=19687, PETRI_PLACES=683, PETRI_TRANSITIONS=455} [2020-10-16 00:04:00,215 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 665 predicate places. [2020-10-16 00:04:00,215 INFO L481 AbstractCegarLoop]: Abstraction has has 683 places, 455 transitions, 19687 flow [2020-10-16 00:04:00,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 00:04:00,216 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:00,216 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:00,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:00,430 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:00,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:00,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1257515262, now seen corresponding path program 109 times [2020-10-16 00:04:00,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:00,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849652499] [2020-10-16 00:04:00,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:00,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849652499] [2020-10-16 00:04:00,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145637648] [2020-10-16 00:04:00,694 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:00,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 00:04:00,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:00,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:04:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:00,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:00,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 00:04:00,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257774164] [2020-10-16 00:04:00,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 00:04:00,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:00,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 00:04:00,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-16 00:04:00,800 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:00,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 455 transitions, 19687 flow. Second operand 24 states. [2020-10-16 00:04:00,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:00,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:00,801 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:02,778 INFO L129 PetriNetUnfolder]: 433/1185 cut-off events. [2020-10-16 00:04:02,778 INFO L130 PetriNetUnfolder]: For 330581/330583 co-relation queries the response was YES. [2020-10-16 00:04:02,806 INFO L80 FinitePrefix]: Finished finitePrefix Result has 29287 conditions, 1185 events. 433/1185 cut-off events. For 330581/330583 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7507 event pairs, 0 based on Foata normal form. 1/1186 useless extension candidates. Maximal degree in co-relation 28986. Up to 737 conditions per place. [2020-10-16 00:04:02,820 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 61 selfloop transitions, 428 changer transitions 0/496 dead transitions. [2020-10-16 00:04:02,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 496 transitions, 24577 flow [2020-10-16 00:04:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 00:04:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 00:04:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2701 transitions. [2020-10-16 00:04:02,823 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67525 [2020-10-16 00:04:02,823 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2701 transitions. [2020-10-16 00:04:02,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2701 transitions. [2020-10-16 00:04:02,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:02,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2701 transitions. [2020-10-16 00:04:02,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 00:04:02,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 00:04:02,827 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 00:04:02,827 INFO L185 Difference]: Start difference. First operand has 683 places, 455 transitions, 19687 flow. Second operand 40 states and 2701 transitions. [2020-10-16 00:04:02,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 496 transitions, 24577 flow [2020-10-16 00:04:04,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 685 places, 496 transitions, 23703 flow, removed 93 selfloop flow, removed 37 redundant places. [2020-10-16 00:04:04,393 INFO L241 Difference]: Finished difference. Result has 687 places, 458 transitions, 20009 flow [2020-10-16 00:04:04,393 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=18813, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=20009, PETRI_PLACES=687, PETRI_TRANSITIONS=458} [2020-10-16 00:04:04,393 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 669 predicate places. [2020-10-16 00:04:04,393 INFO L481 AbstractCegarLoop]: Abstraction has has 687 places, 458 transitions, 20009 flow [2020-10-16 00:04:04,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 00:04:04,393 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:04,394 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:04,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:04,594 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:04,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:04,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1592376589, now seen corresponding path program 110 times [2020-10-16 00:04:04,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:04,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638538745] [2020-10-16 00:04:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:04,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638538745] [2020-10-16 00:04:04,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152484996] [2020-10-16 00:04:04,940 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:04,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:04:04,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:04:04,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 00:04:04,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:05,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:05,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 00:04:05,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314801798] [2020-10-16 00:04:05,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 00:04:05,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:05,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 00:04:05,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-16 00:04:05,005 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:05,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 458 transitions, 20009 flow. Second operand 23 states. [2020-10-16 00:04:05,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:05,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:05,006 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:06,186 INFO L129 PetriNetUnfolder]: 435/1191 cut-off events. [2020-10-16 00:04:06,187 INFO L130 PetriNetUnfolder]: For 348056/348058 co-relation queries the response was YES. [2020-10-16 00:04:06,215 INFO L80 FinitePrefix]: Finished finitePrefix Result has 29850 conditions, 1191 events. 435/1191 cut-off events. For 348056/348058 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7512 event pairs, 0 based on Foata normal form. 4/1195 useless extension candidates. Maximal degree in co-relation 29547. Up to 780 conditions per place. [2020-10-16 00:04:06,229 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 443 selfloop transitions, 31 changer transitions 0/481 dead transitions. [2020-10-16 00:04:06,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 481 transitions, 23219 flow [2020-10-16 00:04:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 00:04:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 00:04:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1612 transitions. [2020-10-16 00:04:06,231 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6716666666666666 [2020-10-16 00:04:06,231 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1612 transitions. [2020-10-16 00:04:06,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1612 transitions. [2020-10-16 00:04:06,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:06,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1612 transitions. [2020-10-16 00:04:06,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 00:04:06,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 00:04:06,234 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 00:04:06,234 INFO L185 Difference]: Start difference. First operand has 687 places, 458 transitions, 20009 flow. Second operand 24 states and 1612 transitions. [2020-10-16 00:04:06,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 481 transitions, 23219 flow [2020-10-16 00:04:07,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 672 places, 481 transitions, 22188 flow, removed 98 selfloop flow, removed 38 redundant places. [2020-10-16 00:04:08,006 INFO L241 Difference]: Finished difference. Result has 674 places, 460 transitions, 19248 flow [2020-10-16 00:04:08,006 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=18978, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=19248, PETRI_PLACES=674, PETRI_TRANSITIONS=460} [2020-10-16 00:04:08,007 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 656 predicate places. [2020-10-16 00:04:08,007 INFO L481 AbstractCegarLoop]: Abstraction has has 674 places, 460 transitions, 19248 flow [2020-10-16 00:04:08,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 00:04:08,007 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:08,007 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:08,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 00:04:08,208 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:08,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1160063869, now seen corresponding path program 111 times [2020-10-16 00:04:08,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:08,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41131594] [2020-10-16 00:04:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:08,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41131594] [2020-10-16 00:04:08,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725039125] [2020-10-16 00:04:08,546 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:08,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 00:04:08,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:04:08,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 00:04:08,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:08,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:04:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:08,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:08,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 00:04:08,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194504161] [2020-10-16 00:04:08,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 00:04:08,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:08,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 00:04:08,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 00:04:08,646 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:08,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 460 transitions, 19248 flow. Second operand 24 states. [2020-10-16 00:04:08,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:08,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:08,647 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:10,002 INFO L129 PetriNetUnfolder]: 443/1214 cut-off events. [2020-10-16 00:04:10,002 INFO L130 PetriNetUnfolder]: For 370083/370085 co-relation queries the response was YES. [2020-10-16 00:04:10,031 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30503 conditions, 1214 events. 443/1214 cut-off events. For 370083/370085 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7715 event pairs, 0 based on Foata normal form. 4/1218 useless extension candidates. Maximal degree in co-relation 30198. Up to 757 conditions per place. [2020-10-16 00:04:10,047 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 380 selfloop transitions, 104 changer transitions 0/491 dead transitions. [2020-10-16 00:04:10,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 491 transitions, 23189 flow [2020-10-16 00:04:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 00:04:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-16 00:04:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1816 transitions. [2020-10-16 00:04:10,049 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6725925925925926 [2020-10-16 00:04:10,049 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1816 transitions. [2020-10-16 00:04:10,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1816 transitions. [2020-10-16 00:04:10,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:10,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1816 transitions. [2020-10-16 00:04:10,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-16 00:04:10,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-16 00:04:10,051 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-16 00:04:10,051 INFO L185 Difference]: Start difference. First operand has 674 places, 460 transitions, 19248 flow. Second operand 27 states and 1816 transitions. [2020-10-16 00:04:10,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 491 transitions, 23189 flow [2020-10-16 00:04:11,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 491 transitions, 22945 flow, removed 93 selfloop flow, removed 21 redundant places. [2020-10-16 00:04:11,885 INFO L241 Difference]: Finished difference. Result has 685 places, 468 transitions, 19975 flow [2020-10-16 00:04:11,885 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=19030, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=19975, PETRI_PLACES=685, PETRI_TRANSITIONS=468} [2020-10-16 00:04:11,885 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 667 predicate places. [2020-10-16 00:04:11,885 INFO L481 AbstractCegarLoop]: Abstraction has has 685 places, 468 transitions, 19975 flow [2020-10-16 00:04:11,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 00:04:11,886 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:11,886 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:12,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:12,086 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:12,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:12,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 112 times [2020-10-16 00:04:12,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:12,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061480652] [2020-10-16 00:04:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:12,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061480652] [2020-10-16 00:04:12,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699466756] [2020-10-16 00:04:12,362 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:12,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:04:12,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:04:12,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 00:04:12,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:12,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:04:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:12,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:12,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 00:04:12,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500685957] [2020-10-16 00:04:12,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 00:04:12,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:12,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 00:04:12,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 00:04:12,458 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:12,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 468 transitions, 19975 flow. Second operand 24 states. [2020-10-16 00:04:12,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:12,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:12,459 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:14,343 INFO L129 PetriNetUnfolder]: 445/1220 cut-off events. [2020-10-16 00:04:14,343 INFO L130 PetriNetUnfolder]: For 380446/380448 co-relation queries the response was YES. [2020-10-16 00:04:14,372 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30958 conditions, 1220 events. 445/1220 cut-off events. For 380446/380448 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7730 event pairs, 0 based on Foata normal form. 4/1224 useless extension candidates. Maximal degree in co-relation 30647. Up to 761 conditions per place. [2020-10-16 00:04:14,388 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 140 selfloop transitions, 356 changer transitions 0/503 dead transitions. [2020-10-16 00:04:14,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 503 transitions, 24509 flow [2020-10-16 00:04:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 00:04:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 00:04:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2496 transitions. [2020-10-16 00:04:14,391 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745945945945946 [2020-10-16 00:04:14,391 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2496 transitions. [2020-10-16 00:04:14,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2496 transitions. [2020-10-16 00:04:14,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:14,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2496 transitions. [2020-10-16 00:04:14,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 00:04:14,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 00:04:14,394 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 00:04:14,394 INFO L185 Difference]: Start difference. First operand has 685 places, 468 transitions, 19975 flow. Second operand 37 states and 2496 transitions. [2020-10-16 00:04:14,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 503 transitions, 24509 flow [2020-10-16 00:04:16,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 701 places, 503 transitions, 24123 flow, removed 116 selfloop flow, removed 20 redundant places. [2020-10-16 00:04:16,324 INFO L241 Difference]: Finished difference. Result has 703 places, 470 transitions, 20633 flow [2020-10-16 00:04:16,325 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=19659, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=20633, PETRI_PLACES=703, PETRI_TRANSITIONS=470} [2020-10-16 00:04:16,325 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 685 predicate places. [2020-10-16 00:04:16,325 INFO L481 AbstractCegarLoop]: Abstraction has has 703 places, 470 transitions, 20633 flow [2020-10-16 00:04:16,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 00:04:16,325 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:16,325 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:16,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-16 00:04:16,526 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:16,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:16,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1783484083, now seen corresponding path program 113 times [2020-10-16 00:04:16,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:16,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467825440] [2020-10-16 00:04:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:16,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467825440] [2020-10-16 00:04:16,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816478365] [2020-10-16 00:04:16,795 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:16,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 00:04:16,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:04:16,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 00:04:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:16,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:16,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 00:04:16,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751601467] [2020-10-16 00:04:16,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 00:04:16,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:16,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 00:04:16,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 00:04:16,873 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:16,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 470 transitions, 20633 flow. Second operand 23 states. [2020-10-16 00:04:16,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:16,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:16,874 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:18,675 INFO L129 PetriNetUnfolder]: 449/1231 cut-off events. [2020-10-16 00:04:18,675 INFO L130 PetriNetUnfolder]: For 382758/382760 co-relation queries the response was YES. [2020-10-16 00:04:18,705 INFO L80 FinitePrefix]: Finished finitePrefix Result has 31529 conditions, 1231 events. 449/1231 cut-off events. For 382758/382760 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7845 event pairs, 0 based on Foata normal form. 4/1235 useless extension candidates. Maximal degree in co-relation 31216. Up to 769 conditions per place. [2020-10-16 00:04:18,721 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 100 selfloop transitions, 404 changer transitions 0/511 dead transitions. [2020-10-16 00:04:18,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 511 transitions, 25649 flow [2020-10-16 00:04:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 00:04:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 00:04:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2835 transitions. [2020-10-16 00:04:18,724 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:04:18,724 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2835 transitions. [2020-10-16 00:04:18,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2835 transitions. [2020-10-16 00:04:18,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:18,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2835 transitions. [2020-10-16 00:04:18,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-16 00:04:18,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-16 00:04:18,727 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-16 00:04:18,728 INFO L185 Difference]: Start difference. First operand has 703 places, 470 transitions, 20633 flow. Second operand 42 states and 2835 transitions. [2020-10-16 00:04:18,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 511 transitions, 25649 flow [2020-10-16 00:04:20,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 511 transitions, 24731 flow, removed 134 selfloop flow, removed 33 redundant places. [2020-10-16 00:04:20,380 INFO L241 Difference]: Finished difference. Result has 713 places, 474 transitions, 20945 flow [2020-10-16 00:04:20,381 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=19793, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=20945, PETRI_PLACES=713, PETRI_TRANSITIONS=474} [2020-10-16 00:04:20,381 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 695 predicate places. [2020-10-16 00:04:20,381 INFO L481 AbstractCegarLoop]: Abstraction has has 713 places, 474 transitions, 20945 flow [2020-10-16 00:04:20,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 00:04:20,381 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:20,381 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:20,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 00:04:20,588 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:20,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1766890093, now seen corresponding path program 114 times [2020-10-16 00:04:20,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:20,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483365718] [2020-10-16 00:04:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:20,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483365718] [2020-10-16 00:04:20,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421466814] [2020-10-16 00:04:20,850 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:20,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 00:04:20,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:04:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 00:04:20,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:20,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:20,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 00:04:20,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252528000] [2020-10-16 00:04:20,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 00:04:20,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:20,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 00:04:20,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 00:04:20,960 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:20,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 474 transitions, 20945 flow. Second operand 24 states. [2020-10-16 00:04:20,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:20,961 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:20,961 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:23,028 INFO L129 PetriNetUnfolder]: 453/1241 cut-off events. [2020-10-16 00:04:23,029 INFO L130 PetriNetUnfolder]: For 386389/386395 co-relation queries the response was YES. [2020-10-16 00:04:23,058 INFO L80 FinitePrefix]: Finished finitePrefix Result has 31904 conditions, 1241 events. 453/1241 cut-off events. For 386389/386395 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7891 event pairs, 0 based on Foata normal form. 8/1249 useless extension candidates. Maximal degree in co-relation 31589. Up to 775 conditions per place. [2020-10-16 00:04:23,075 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 90 selfloop transitions, 420 changer transitions 0/517 dead transitions. [2020-10-16 00:04:23,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 517 transitions, 26281 flow [2020-10-16 00:04:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 00:04:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 00:04:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2904 transitions. [2020-10-16 00:04:23,077 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753488372093023 [2020-10-16 00:04:23,077 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2904 transitions. [2020-10-16 00:04:23,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2904 transitions. [2020-10-16 00:04:23,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:23,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2904 transitions. [2020-10-16 00:04:23,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 44 states. [2020-10-16 00:04:23,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 44 states. [2020-10-16 00:04:23,081 INFO L81 ComplementDD]: Finished complementDD. Result 44 states. [2020-10-16 00:04:23,081 INFO L185 Difference]: Start difference. First operand has 713 places, 474 transitions, 20945 flow. Second operand 43 states and 2904 transitions. [2020-10-16 00:04:23,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 517 transitions, 26281 flow [2020-10-16 00:04:24,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 517 transitions, 25291 flow, removed 127 selfloop flow, removed 39 redundant places. [2020-10-16 00:04:25,003 INFO L241 Difference]: Finished difference. Result has 719 places, 478 transitions, 21348 flow [2020-10-16 00:04:25,004 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=20039, PETRI_DIFFERENCE_MINUEND_PLACES=674, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=21348, PETRI_PLACES=719, PETRI_TRANSITIONS=478} [2020-10-16 00:04:25,004 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 701 predicate places. [2020-10-16 00:04:25,004 INFO L481 AbstractCegarLoop]: Abstraction has has 719 places, 478 transitions, 21348 flow [2020-10-16 00:04:25,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 00:04:25,004 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:25,004 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:25,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-16 00:04:25,205 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash 852224602, now seen corresponding path program 115 times [2020-10-16 00:04:25,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:25,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982853228] [2020-10-16 00:04:25,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:25,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982853228] [2020-10-16 00:04:25,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371229728] [2020-10-16 00:04:25,575 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:25,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 00:04:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:25,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:25,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 00:04:25,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62123676] [2020-10-16 00:04:25,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 00:04:25,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:25,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 00:04:25,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-16 00:04:25,640 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:25,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 478 transitions, 21348 flow. Second operand 24 states. [2020-10-16 00:04:25,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:25,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:25,641 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:26,986 INFO L129 PetriNetUnfolder]: 455/1247 cut-off events. [2020-10-16 00:04:26,986 INFO L130 PetriNetUnfolder]: For 396662/396668 co-relation queries the response was YES. [2020-10-16 00:04:27,017 INFO L80 FinitePrefix]: Finished finitePrefix Result has 32348 conditions, 1247 events. 455/1247 cut-off events. For 396662/396668 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7919 event pairs, 0 based on Foata normal form. 5/1252 useless extension candidates. Maximal degree in co-relation 32030. Up to 779 conditions per place. [2020-10-16 00:04:27,034 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 422 selfloop transitions, 74 changer transitions 0/503 dead transitions. [2020-10-16 00:04:27,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 503 transitions, 24884 flow [2020-10-16 00:04:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 00:04:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 00:04:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1747 transitions. [2020-10-16 00:04:27,036 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.671923076923077 [2020-10-16 00:04:27,036 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1747 transitions. [2020-10-16 00:04:27,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1747 transitions. [2020-10-16 00:04:27,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:27,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1747 transitions. [2020-10-16 00:04:27,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 00:04:27,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 00:04:27,038 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 00:04:27,038 INFO L185 Difference]: Start difference. First operand has 719 places, 478 transitions, 21348 flow. Second operand 26 states and 1747 transitions. [2020-10-16 00:04:27,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 503 transitions, 24884 flow [2020-10-16 00:04:28,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 503 transitions, 23813 flow, removed 147 selfloop flow, removed 39 redundant places. [2020-10-16 00:04:28,931 INFO L241 Difference]: Finished difference. Result has 707 places, 480 transitions, 20667 flow [2020-10-16 00:04:28,931 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=20301, PETRI_DIFFERENCE_MINUEND_PLACES=680, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=20667, PETRI_PLACES=707, PETRI_TRANSITIONS=480} [2020-10-16 00:04:28,931 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 689 predicate places. [2020-10-16 00:04:28,932 INFO L481 AbstractCegarLoop]: Abstraction has has 707 places, 480 transitions, 20667 flow [2020-10-16 00:04:28,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 00:04:28,932 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:28,932 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:29,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:29,138 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash 139611352, now seen corresponding path program 116 times [2020-10-16 00:04:29,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:29,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760700870] [2020-10-16 00:04:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:29,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760700870] [2020-10-16 00:04:29,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586043833] [2020-10-16 00:04:29,502 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:29,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:04:29,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:04:29,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 00:04:29,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:29,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:04:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:29,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:29,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 00:04:29,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581083694] [2020-10-16 00:04:29,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 00:04:29,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:29,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 00:04:29,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-16 00:04:29,609 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:29,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 480 transitions, 20667 flow. Second operand 25 states. [2020-10-16 00:04:29,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:29,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:29,610 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:31,182 INFO L129 PetriNetUnfolder]: 457/1254 cut-off events. [2020-10-16 00:04:31,182 INFO L130 PetriNetUnfolder]: For 406857/406859 co-relation queries the response was YES. [2020-10-16 00:04:31,211 INFO L80 FinitePrefix]: Finished finitePrefix Result has 32340 conditions, 1254 events. 457/1254 cut-off events. For 406857/406859 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7990 event pairs, 0 based on Foata normal form. 4/1258 useless extension candidates. Maximal degree in co-relation 32020. Up to 783 conditions per place. [2020-10-16 00:04:31,228 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 314 selfloop transitions, 186 changer transitions 0/507 dead transitions. [2020-10-16 00:04:31,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 507 transitions, 24443 flow [2020-10-16 00:04:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 00:04:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-16 00:04:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1951 transitions. [2020-10-16 00:04:31,230 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6727586206896552 [2020-10-16 00:04:31,230 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1951 transitions. [2020-10-16 00:04:31,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1951 transitions. [2020-10-16 00:04:31,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:31,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1951 transitions. [2020-10-16 00:04:31,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-16 00:04:31,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-16 00:04:31,233 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-16 00:04:31,233 INFO L185 Difference]: Start difference. First operand has 707 places, 480 transitions, 20667 flow. Second operand 29 states and 1951 transitions. [2020-10-16 00:04:31,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 507 transitions, 24443 flow [2020-10-16 00:04:32,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 507 transitions, 24081 flow, removed 111 selfloop flow, removed 23 redundant places. [2020-10-16 00:04:32,976 INFO L241 Difference]: Finished difference. Result has 714 places, 482 transitions, 20961 flow [2020-10-16 00:04:32,976 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=20359, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=20961, PETRI_PLACES=714, PETRI_TRANSITIONS=482} [2020-10-16 00:04:32,976 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 696 predicate places. [2020-10-16 00:04:32,976 INFO L481 AbstractCegarLoop]: Abstraction has has 714 places, 482 transitions, 20961 flow [2020-10-16 00:04:32,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 00:04:32,977 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:32,977 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:33,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-16 00:04:33,177 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:33,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:33,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1846850238, now seen corresponding path program 117 times [2020-10-16 00:04:33,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:33,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878174391] [2020-10-16 00:04:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:33,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878174391] [2020-10-16 00:04:33,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006136252] [2020-10-16 00:04:33,509 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:33,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 00:04:33,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:04:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 00:04:33,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:33,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:33,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 00:04:33,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227615951] [2020-10-16 00:04:33,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 00:04:33,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:33,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 00:04:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 00:04:33,583 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:33,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 714 places, 482 transitions, 20961 flow. Second operand 24 states. [2020-10-16 00:04:33,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:33,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:33,584 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:35,159 INFO L129 PetriNetUnfolder]: 461/1266 cut-off events. [2020-10-16 00:04:35,160 INFO L130 PetriNetUnfolder]: For 411715/411721 co-relation queries the response was YES. [2020-10-16 00:04:35,192 INFO L80 FinitePrefix]: Finished finitePrefix Result has 32738 conditions, 1266 events. 461/1266 cut-off events. For 411715/411721 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8058 event pairs, 0 based on Foata normal form. 5/1271 useless extension candidates. Maximal degree in co-relation 32416. Up to 791 conditions per place. [2020-10-16 00:04:35,208 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 226 selfloop transitions, 282 changer transitions 0/515 dead transitions. [2020-10-16 00:04:35,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 515 transitions, 25231 flow [2020-10-16 00:04:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 00:04:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 00:04:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2155 transitions. [2020-10-16 00:04:35,210 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734375 [2020-10-16 00:04:35,211 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2155 transitions. [2020-10-16 00:04:35,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2155 transitions. [2020-10-16 00:04:35,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:35,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2155 transitions. [2020-10-16 00:04:35,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 00:04:35,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 00:04:35,213 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 00:04:35,213 INFO L185 Difference]: Start difference. First operand has 714 places, 482 transitions, 20961 flow. Second operand 32 states and 2155 transitions. [2020-10-16 00:04:35,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 515 transitions, 25231 flow [2020-10-16 00:04:37,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 515 transitions, 24651 flow, removed 114 selfloop flow, removed 26 redundant places. [2020-10-16 00:04:37,294 INFO L241 Difference]: Finished difference. Result has 721 places, 486 transitions, 21315 flow [2020-10-16 00:04:37,294 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=20443, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=21315, PETRI_PLACES=721, PETRI_TRANSITIONS=486} [2020-10-16 00:04:37,294 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 703 predicate places. [2020-10-16 00:04:37,294 INFO L481 AbstractCegarLoop]: Abstraction has has 721 places, 486 transitions, 21315 flow [2020-10-16 00:04:37,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 00:04:37,294 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:37,294 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:37,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:37,495 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:37,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1629312894, now seen corresponding path program 118 times [2020-10-16 00:04:37,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:37,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568957211] [2020-10-16 00:04:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:37,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568957211] [2020-10-16 00:04:37,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253714898] [2020-10-16 00:04:37,810 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:37,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:04:37,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:04:37,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 00:04:37,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:37,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:04:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:37,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:37,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 00:04:37,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895820853] [2020-10-16 00:04:37,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 00:04:37,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:37,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 00:04:37,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-16 00:04:37,905 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:37,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 486 transitions, 21315 flow. Second operand 25 states. [2020-10-16 00:04:37,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:37,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:37,906 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:39,859 INFO L129 PetriNetUnfolder]: 465/1278 cut-off events. [2020-10-16 00:04:39,859 INFO L130 PetriNetUnfolder]: For 414859/414865 co-relation queries the response was YES. [2020-10-16 00:04:39,889 INFO L80 FinitePrefix]: Finished finitePrefix Result has 33137 conditions, 1278 events. 465/1278 cut-off events. For 414859/414865 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8145 event pairs, 0 based on Foata normal form. 8/1286 useless extension candidates. Maximal degree in co-relation 32813. Up to 799 conditions per place. [2020-10-16 00:04:39,908 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 174 selfloop transitions, 340 changer transitions 0/521 dead transitions. [2020-10-16 00:04:39,908 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 521 transitions, 25807 flow [2020-10-16 00:04:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 00:04:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 00:04:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2359 transitions. [2020-10-16 00:04:39,910 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 00:04:39,910 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2359 transitions. [2020-10-16 00:04:39,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2359 transitions. [2020-10-16 00:04:39,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:39,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2359 transitions. [2020-10-16 00:04:39,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 00:04:39,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 00:04:39,913 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 00:04:39,913 INFO L185 Difference]: Start difference. First operand has 721 places, 486 transitions, 21315 flow. Second operand 35 states and 2359 transitions. [2020-10-16 00:04:39,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 521 transitions, 25807 flow [2020-10-16 00:04:41,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 521 transitions, 25059 flow, removed 116 selfloop flow, removed 28 redundant places. [2020-10-16 00:04:41,865 INFO L241 Difference]: Finished difference. Result has 729 places, 490 transitions, 21633 flow [2020-10-16 00:04:41,865 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=20633, PETRI_DIFFERENCE_MINUEND_PLACES=693, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=21633, PETRI_PLACES=729, PETRI_TRANSITIONS=490} [2020-10-16 00:04:41,865 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 711 predicate places. [2020-10-16 00:04:41,865 INFO L481 AbstractCegarLoop]: Abstraction has has 729 places, 490 transitions, 21633 flow [2020-10-16 00:04:41,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 00:04:41,865 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:41,865 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:42,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:42,066 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:42,067 INFO L82 PathProgramCache]: Analyzing trace with hash 12153852, now seen corresponding path program 119 times [2020-10-16 00:04:42,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:42,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243190250] [2020-10-16 00:04:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:42,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243190250] [2020-10-16 00:04:42,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775564565] [2020-10-16 00:04:42,368 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:42,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 00:04:42,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:04:42,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 00:04:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:42,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:42,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 00:04:42,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941800549] [2020-10-16 00:04:42,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 00:04:42,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 00:04:42,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 00:04:42,446 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:42,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 490 transitions, 21633 flow. Second operand 24 states. [2020-10-16 00:04:42,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:42,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:42,447 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:44,216 INFO L129 PetriNetUnfolder]: 469/1290 cut-off events. [2020-10-16 00:04:44,216 INFO L130 PetriNetUnfolder]: For 417998/418000 co-relation queries the response was YES. [2020-10-16 00:04:44,249 INFO L80 FinitePrefix]: Finished finitePrefix Result has 33518 conditions, 1290 events. 469/1290 cut-off events. For 417998/418000 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8223 event pairs, 0 based on Foata normal form. 2/1292 useless extension candidates. Maximal degree in co-relation 33192. Up to 807 conditions per place. [2020-10-16 00:04:44,266 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 148 selfloop transitions, 372 changer transitions 0/527 dead transitions. [2020-10-16 00:04:44,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 527 transitions, 26347 flow [2020-10-16 00:04:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 00:04:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 00:04:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2427 transitions. [2020-10-16 00:04:44,268 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741666666666667 [2020-10-16 00:04:44,269 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2427 transitions. [2020-10-16 00:04:44,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2427 transitions. [2020-10-16 00:04:44,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:44,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2427 transitions. [2020-10-16 00:04:44,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 00:04:44,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 00:04:44,271 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 00:04:44,271 INFO L185 Difference]: Start difference. First operand has 729 places, 490 transitions, 21633 flow. Second operand 36 states and 2427 transitions. [2020-10-16 00:04:44,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 527 transitions, 26347 flow [2020-10-16 00:04:46,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 734 places, 527 transitions, 25513 flow, removed 122 selfloop flow, removed 30 redundant places. [2020-10-16 00:04:46,303 INFO L241 Difference]: Finished difference. Result has 736 places, 494 transitions, 21945 flow [2020-10-16 00:04:46,304 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=20873, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21945, PETRI_PLACES=736, PETRI_TRANSITIONS=494} [2020-10-16 00:04:46,304 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 718 predicate places. [2020-10-16 00:04:46,304 INFO L481 AbstractCegarLoop]: Abstraction has has 736 places, 494 transitions, 21945 flow [2020-10-16 00:04:46,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 00:04:46,304 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:46,304 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:46,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:46,505 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1269043552, now seen corresponding path program 120 times [2020-10-16 00:04:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:46,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742875800] [2020-10-16 00:04:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:46,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742875800] [2020-10-16 00:04:46,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118895795] [2020-10-16 00:04:46,802 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:46,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 00:04:46,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:04:46,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 00:04:46,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:46,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:04:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:46,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:46,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 00:04:46,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84576123] [2020-10-16 00:04:46,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 00:04:46,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 00:04:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-16 00:04:46,918 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:46,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 494 transitions, 21945 flow. Second operand 25 states. [2020-10-16 00:04:46,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:46,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:46,919 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:49,209 INFO L129 PetriNetUnfolder]: 473/1302 cut-off events. [2020-10-16 00:04:49,209 INFO L130 PetriNetUnfolder]: For 421292/421298 co-relation queries the response was YES. [2020-10-16 00:04:49,238 INFO L80 FinitePrefix]: Finished finitePrefix Result has 33897 conditions, 1302 events. 473/1302 cut-off events. For 421292/421298 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8333 event pairs, 0 based on Foata normal form. 8/1310 useless extension candidates. Maximal degree in co-relation 33569. Up to 815 conditions per place. [2020-10-16 00:04:49,256 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 134 selfloop transitions, 390 changer transitions 0/531 dead transitions. [2020-10-16 00:04:49,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 772 places, 531 transitions, 26667 flow [2020-10-16 00:04:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 00:04:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 00:04:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2495 transitions. [2020-10-16 00:04:49,259 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743243243243243 [2020-10-16 00:04:49,259 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2495 transitions. [2020-10-16 00:04:49,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2495 transitions. [2020-10-16 00:04:49,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:49,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2495 transitions. [2020-10-16 00:04:49,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 00:04:49,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 00:04:49,262 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 00:04:49,262 INFO L185 Difference]: Start difference. First operand has 736 places, 494 transitions, 21945 flow. Second operand 37 states and 2495 transitions. [2020-10-16 00:04:49,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 772 places, 531 transitions, 26667 flow [2020-10-16 00:04:51,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 531 transitions, 25590 flow, removed 122 selfloop flow, removed 37 redundant places. [2020-10-16 00:04:51,164 INFO L241 Difference]: Finished difference. Result has 737 places, 498 transitions, 22058 flow [2020-10-16 00:04:51,165 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=20942, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=22058, PETRI_PLACES=737, PETRI_TRANSITIONS=498} [2020-10-16 00:04:51,165 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 719 predicate places. [2020-10-16 00:04:51,165 INFO L481 AbstractCegarLoop]: Abstraction has has 737 places, 498 transitions, 22058 flow [2020-10-16 00:04:51,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 00:04:51,165 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:51,165 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:51,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:51,366 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:51,366 INFO L82 PathProgramCache]: Analyzing trace with hash -751023476, now seen corresponding path program 121 times [2020-10-16 00:04:51,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:51,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594099391] [2020-10-16 00:04:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:51,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594099391] [2020-10-16 00:04:51,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438803671] [2020-10-16 00:04:51,658 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:51,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 00:04:51,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:51,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:04:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:51,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:51,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 00:04:51,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221222956] [2020-10-16 00:04:51,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 00:04:51,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:51,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 00:04:51,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-16 00:04:51,757 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:51,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 498 transitions, 22058 flow. Second operand 25 states. [2020-10-16 00:04:51,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:51,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:51,758 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:53,921 INFO L129 PetriNetUnfolder]: 475/1308 cut-off events. [2020-10-16 00:04:53,921 INFO L130 PetriNetUnfolder]: For 423039/423041 co-relation queries the response was YES. [2020-10-16 00:04:53,975 INFO L80 FinitePrefix]: Finished finitePrefix Result has 34024 conditions, 1308 events. 475/1308 cut-off events. For 423039/423041 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8361 event pairs, 0 based on Foata normal form. 4/1312 useless extension candidates. Maximal degree in co-relation 33694. Up to 819 conditions per place. [2020-10-16 00:04:53,992 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 102 selfloop transitions, 426 changer transitions 0/535 dead transitions. [2020-10-16 00:04:53,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 535 transitions, 26920 flow [2020-10-16 00:04:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 00:04:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 00:04:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2631 transitions. [2020-10-16 00:04:53,995 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6746153846153846 [2020-10-16 00:04:53,995 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2631 transitions. [2020-10-16 00:04:53,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2631 transitions. [2020-10-16 00:04:53,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:53,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2631 transitions. [2020-10-16 00:04:53,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-16 00:04:53,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-16 00:04:53,998 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-16 00:04:53,998 INFO L185 Difference]: Start difference. First operand has 737 places, 498 transitions, 22058 flow. Second operand 39 states and 2631 transitions. [2020-10-16 00:04:53,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 775 places, 535 transitions, 26920 flow [2020-10-16 00:04:56,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 535 transitions, 25954 flow, removed 122 selfloop flow, removed 33 redundant places. [2020-10-16 00:04:56,132 INFO L241 Difference]: Finished difference. Result has 744 places, 500 transitions, 22289 flow [2020-10-16 00:04:56,133 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=21166, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=22289, PETRI_PLACES=744, PETRI_TRANSITIONS=500} [2020-10-16 00:04:56,133 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 726 predicate places. [2020-10-16 00:04:56,133 INFO L481 AbstractCegarLoop]: Abstraction has has 744 places, 500 transitions, 22289 flow [2020-10-16 00:04:56,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 00:04:56,133 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:04:56,133 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:04:56,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 00:04:56,334 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:04:56,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:04:56,335 INFO L82 PathProgramCache]: Analyzing trace with hash -344844180, now seen corresponding path program 122 times [2020-10-16 00:04:56,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:04:56,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560407400] [2020-10-16 00:04:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:04:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:04:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:56,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560407400] [2020-10-16 00:04:56,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692073798] [2020-10-16 00:04:56,615 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:04:56,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:04:56,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:04:56,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 00:04:56,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:04:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:04:56,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:04:56,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 00:04:56,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413802380] [2020-10-16 00:04:56,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 00:04:56,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:04:56,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 00:04:56,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-16 00:04:56,694 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:04:56,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 500 transitions, 22289 flow. Second operand 24 states. [2020-10-16 00:04:56,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:04:56,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:04:56,695 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:04:58,798 INFO L129 PetriNetUnfolder]: 477/1313 cut-off events. [2020-10-16 00:04:58,799 INFO L130 PetriNetUnfolder]: For 424282/424284 co-relation queries the response was YES. [2020-10-16 00:04:58,830 INFO L80 FinitePrefix]: Finished finitePrefix Result has 34248 conditions, 1313 events. 477/1313 cut-off events. For 424282/424284 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8402 event pairs, 0 based on Foata normal form. 2/1315 useless extension candidates. Maximal degree in co-relation 33916. Up to 823 conditions per place. [2020-10-16 00:04:58,848 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 72 selfloop transitions, 462 changer transitions 0/541 dead transitions. [2020-10-16 00:04:58,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 541 transitions, 27575 flow [2020-10-16 00:04:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 00:04:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 00:04:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2835 transitions. [2020-10-16 00:04:58,850 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:04:58,850 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2835 transitions. [2020-10-16 00:04:58,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2835 transitions. [2020-10-16 00:04:58,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:04:58,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2835 transitions. [2020-10-16 00:04:58,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-16 00:04:58,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-16 00:04:58,854 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-16 00:04:58,854 INFO L185 Difference]: Start difference. First operand has 744 places, 500 transitions, 22289 flow. Second operand 42 states and 2835 transitions. [2020-10-16 00:04:58,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 541 transitions, 27575 flow [2020-10-16 00:05:00,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 541 transitions, 26536 flow, removed 124 selfloop flow, removed 36 redundant places. [2020-10-16 00:05:00,927 INFO L241 Difference]: Finished difference. Result has 751 places, 502 transitions, 22535 flow [2020-10-16 00:05:00,927 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=21332, PETRI_DIFFERENCE_MINUEND_PLACES=708, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=22535, PETRI_PLACES=751, PETRI_TRANSITIONS=502} [2020-10-16 00:05:00,928 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 733 predicate places. [2020-10-16 00:05:00,928 INFO L481 AbstractCegarLoop]: Abstraction has has 751 places, 502 transitions, 22535 flow [2020-10-16 00:05:00,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 00:05:00,928 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:05:00,928 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:05:01,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-16 00:05:01,129 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:05:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:05:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash -328250190, now seen corresponding path program 123 times [2020-10-16 00:05:01,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:05:01,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083397727] [2020-10-16 00:05:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:05:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:01,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083397727] [2020-10-16 00:05:01,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055695106] [2020-10-16 00:05:01,415 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:01,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 00:05:01,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:05:01,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:05:01,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:05:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:01,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:05:01,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 00:05:01,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079576735] [2020-10-16 00:05:01,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 00:05:01,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:05:01,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 00:05:01,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-16 00:05:01,525 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:05:01,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 502 transitions, 22535 flow. Second operand 25 states. [2020-10-16 00:05:01,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:05:01,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:05:01,525 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:05:03,832 INFO L129 PetriNetUnfolder]: 481/1324 cut-off events. [2020-10-16 00:05:03,832 INFO L130 PetriNetUnfolder]: For 428496/428498 co-relation queries the response was YES. [2020-10-16 00:05:03,868 INFO L80 FinitePrefix]: Finished finitePrefix Result has 34628 conditions, 1324 events. 481/1324 cut-off events. For 428496/428498 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8482 event pairs, 0 based on Foata normal form. 2/1326 useless extension candidates. Maximal degree in co-relation 34294. Up to 829 conditions per place. [2020-10-16 00:05:03,885 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 64 selfloop transitions, 476 changer transitions 0/547 dead transitions. [2020-10-16 00:05:03,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 547 transitions, 28213 flow [2020-10-16 00:05:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 00:05:03,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 00:05:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2904 transitions. [2020-10-16 00:05:03,889 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753488372093023 [2020-10-16 00:05:03,889 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2904 transitions. [2020-10-16 00:05:03,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2904 transitions. [2020-10-16 00:05:03,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:05:03,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2904 transitions. [2020-10-16 00:05:03,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 44 states. [2020-10-16 00:05:03,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 44 states. [2020-10-16 00:05:03,894 INFO L81 ComplementDD]: Finished complementDD. Result 44 states. [2020-10-16 00:05:03,895 INFO L185 Difference]: Start difference. First operand has 751 places, 502 transitions, 22535 flow. Second operand 43 states and 2904 transitions. [2020-10-16 00:05:03,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 547 transitions, 28213 flow [2020-10-16 00:05:06,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 547 transitions, 27068 flow, removed 127 selfloop flow, removed 42 redundant places. [2020-10-16 00:05:06,253 INFO L241 Difference]: Finished difference. Result has 754 places, 506 transitions, 22903 flow [2020-10-16 00:05:06,254 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=21478, PETRI_DIFFERENCE_MINUEND_PLACES=709, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=22903, PETRI_PLACES=754, PETRI_TRANSITIONS=506} [2020-10-16 00:05:06,254 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 736 predicate places. [2020-10-16 00:05:06,254 INFO L481 AbstractCegarLoop]: Abstraction has has 754 places, 506 transitions, 22903 flow [2020-10-16 00:05:06,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 00:05:06,254 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:05:06,254 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:05:06,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 00:05:06,455 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:05:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:05:06,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1060998272, now seen corresponding path program 124 times [2020-10-16 00:05:06,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:05:06,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059863433] [2020-10-16 00:05:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:05:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:06,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059863433] [2020-10-16 00:05:06,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852214039] [2020-10-16 00:05:06,742 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:06,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:05:06,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:05:06,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 00:05:06,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:05:06,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:05:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:06,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:05:06,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 00:05:06,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713058878] [2020-10-16 00:05:06,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 00:05:06,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:05:06,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 00:05:06,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-16 00:05:06,845 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:05:06,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 506 transitions, 22903 flow. Second operand 25 states. [2020-10-16 00:05:06,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:05:06,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:05:06,845 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:05:09,214 INFO L129 PetriNetUnfolder]: 484/1328 cut-off events. [2020-10-16 00:05:09,214 INFO L130 PetriNetUnfolder]: For 438540/438546 co-relation queries the response was YES. [2020-10-16 00:05:09,248 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35105 conditions, 1328 events. 484/1328 cut-off events. For 438540/438546 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8490 event pairs, 0 based on Foata normal form. 7/1335 useless extension candidates. Maximal degree in co-relation 34768. Up to 833 conditions per place. [2020-10-16 00:05:09,267 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 108 selfloop transitions, 434 changer transitions 0/549 dead transitions. [2020-10-16 00:05:09,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 797 places, 549 transitions, 28441 flow [2020-10-16 00:05:09,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 00:05:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 00:05:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2971 transitions. [2020-10-16 00:05:09,269 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752272727272727 [2020-10-16 00:05:09,269 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2971 transitions. [2020-10-16 00:05:09,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2971 transitions. [2020-10-16 00:05:09,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:05:09,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2971 transitions. [2020-10-16 00:05:09,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-16 00:05:09,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-16 00:05:09,273 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-16 00:05:09,273 INFO L185 Difference]: Start difference. First operand has 754 places, 506 transitions, 22903 flow. Second operand 44 states and 2971 transitions. [2020-10-16 00:05:09,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 797 places, 549 transitions, 28441 flow [2020-10-16 00:05:11,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 549 transitions, 27256 flow, removed 160 selfloop flow, removed 39 redundant places. [2020-10-16 00:05:11,388 INFO L241 Difference]: Finished difference. Result has 760 places, 509 transitions, 22984 flow [2020-10-16 00:05:11,388 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=21762, PETRI_DIFFERENCE_MINUEND_PLACES=715, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=22984, PETRI_PLACES=760, PETRI_TRANSITIONS=509} [2020-10-16 00:05:11,388 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 742 predicate places. [2020-10-16 00:05:11,388 INFO L481 AbstractCegarLoop]: Abstraction has has 760 places, 509 transitions, 22984 flow [2020-10-16 00:05:11,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 00:05:11,388 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:05:11,389 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:05:11,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 00:05:11,589 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:05:11,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:05:11,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1598742837, now seen corresponding path program 125 times [2020-10-16 00:05:11,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:05:11,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153260905] [2020-10-16 00:05:11,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:05:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:11,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153260905] [2020-10-16 00:05:11,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160571839] [2020-10-16 00:05:11,901 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:11,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 00:05:11,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:05:11,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:05:11,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:05:11,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:05:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:12,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:05:12,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 00:05:12,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118296981] [2020-10-16 00:05:12,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:05:12,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:05:12,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:05:12,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:05:12,014 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:05:12,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 509 transitions, 22984 flow. Second operand 26 states. [2020-10-16 00:05:12,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:05:12,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:05:12,014 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:05:14,533 INFO L129 PetriNetUnfolder]: 487/1336 cut-off events. [2020-10-16 00:05:14,533 INFO L130 PetriNetUnfolder]: For 448934/448940 co-relation queries the response was YES. [2020-10-16 00:05:14,577 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35455 conditions, 1336 events. 487/1336 cut-off events. For 448934/448940 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8543 event pairs, 0 based on Foata normal form. 4/1340 useless extension candidates. Maximal degree in co-relation 35116. Up to 837 conditions per place. [2020-10-16 00:05:14,595 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 65 selfloop transitions, 482 changer transitions 0/554 dead transitions. [2020-10-16 00:05:14,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 554 transitions, 28778 flow [2020-10-16 00:05:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 00:05:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 00:05:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2971 transitions. [2020-10-16 00:05:14,598 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752272727272727 [2020-10-16 00:05:14,598 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2971 transitions. [2020-10-16 00:05:14,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2971 transitions. [2020-10-16 00:05:14,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:05:14,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2971 transitions. [2020-10-16 00:05:14,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-16 00:05:14,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-16 00:05:14,601 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-16 00:05:14,601 INFO L185 Difference]: Start difference. First operand has 760 places, 509 transitions, 22984 flow. Second operand 44 states and 2971 transitions. [2020-10-16 00:05:14,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 554 transitions, 28778 flow [2020-10-16 00:05:16,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 762 places, 554 transitions, 27712 flow, removed 127 selfloop flow, removed 41 redundant places. [2020-10-16 00:05:16,833 INFO L241 Difference]: Finished difference. Result has 764 places, 512 transitions, 23280 flow [2020-10-16 00:05:16,834 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=21962, PETRI_DIFFERENCE_MINUEND_PLACES=719, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=23280, PETRI_PLACES=764, PETRI_TRANSITIONS=512} [2020-10-16 00:05:16,834 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 746 predicate places. [2020-10-16 00:05:16,834 INFO L481 AbstractCegarLoop]: Abstraction has has 764 places, 512 transitions, 23280 flow [2020-10-16 00:05:16,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:05:16,834 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:05:16,834 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:05:17,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:17,042 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:05:17,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:05:17,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1451854926, now seen corresponding path program 126 times [2020-10-16 00:05:17,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:05:17,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555081153] [2020-10-16 00:05:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:05:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:17,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555081153] [2020-10-16 00:05:17,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571667216] [2020-10-16 00:05:17,459 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:17,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 00:05:17,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:05:17,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:05:17,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:05:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:17,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:05:17,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 00:05:17,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139293830] [2020-10-16 00:05:17,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 00:05:17,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:05:17,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 00:05:17,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-10-16 00:05:17,531 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:05:17,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 512 transitions, 23280 flow. Second operand 25 states. [2020-10-16 00:05:17,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:05:17,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:05:17,532 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:05:19,095 INFO L129 PetriNetUnfolder]: 489/1343 cut-off events. [2020-10-16 00:05:19,095 INFO L130 PetriNetUnfolder]: For 461438/461444 co-relation queries the response was YES. [2020-10-16 00:05:19,129 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35826 conditions, 1343 events. 489/1343 cut-off events. For 461438/461444 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8613 event pairs, 0 based on Foata normal form. 8/1351 useless extension candidates. Maximal degree in co-relation 35485. Up to 880 conditions per place. [2020-10-16 00:05:19,148 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 497 selfloop transitions, 33 changer transitions 0/537 dead transitions. [2020-10-16 00:05:19,148 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 789 places, 537 transitions, 26998 flow [2020-10-16 00:05:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 00:05:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 00:05:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1746 transitions. [2020-10-16 00:05:19,151 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6715384615384615 [2020-10-16 00:05:19,151 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1746 transitions. [2020-10-16 00:05:19,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1746 transitions. [2020-10-16 00:05:19,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:05:19,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1746 transitions. [2020-10-16 00:05:19,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 00:05:19,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 00:05:19,154 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 00:05:19,154 INFO L185 Difference]: Start difference. First operand has 764 places, 512 transitions, 23280 flow. Second operand 26 states and 1746 transitions. [2020-10-16 00:05:19,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 789 places, 537 transitions, 26998 flow [2020-10-16 00:05:21,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 748 places, 537 transitions, 25864 flow, removed 108 selfloop flow, removed 41 redundant places. [2020-10-16 00:05:21,515 INFO L241 Difference]: Finished difference. Result has 750 places, 514 transitions, 22436 flow [2020-10-16 00:05:21,515 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=22146, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=22436, PETRI_PLACES=750, PETRI_TRANSITIONS=514} [2020-10-16 00:05:21,516 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 732 predicate places. [2020-10-16 00:05:21,516 INFO L481 AbstractCegarLoop]: Abstraction has has 750 places, 514 transitions, 22436 flow [2020-10-16 00:05:21,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 00:05:21,516 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:05:21,516 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:05:21,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-16 00:05:21,722 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:05:21,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:05:21,722 INFO L82 PathProgramCache]: Analyzing trace with hash -861948444, now seen corresponding path program 127 times [2020-10-16 00:05:21,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:05:21,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518512687] [2020-10-16 00:05:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:05:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:22,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518512687] [2020-10-16 00:05:22,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767953979] [2020-10-16 00:05:22,113 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:22,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:05:22,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:05:22,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:05:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:22,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:05:22,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 00:05:22,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351885011] [2020-10-16 00:05:22,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:05:22,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:05:22,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:05:22,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:05:22,208 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:05:22,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 514 transitions, 22436 flow. Second operand 26 states. [2020-10-16 00:05:22,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:05:22,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:05:22,209 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:05:24,009 INFO L129 PetriNetUnfolder]: 495/1361 cut-off events. [2020-10-16 00:05:24,010 INFO L130 PetriNetUnfolder]: For 485555/485557 co-relation queries the response was YES. [2020-10-16 00:05:24,046 INFO L80 FinitePrefix]: Finished finitePrefix Result has 36296 conditions, 1361 events. 495/1361 cut-off events. For 485555/485557 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8745 event pairs, 0 based on Foata normal form. 4/1365 useless extension candidates. Maximal degree in co-relation 35953. Up to 853 conditions per place. [2020-10-16 00:05:24,065 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 358 selfloop transitions, 182 changer transitions 0/547 dead transitions. [2020-10-16 00:05:24,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 547 transitions, 26896 flow [2020-10-16 00:05:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 00:05:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 00:05:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2086 transitions. [2020-10-16 00:05:24,067 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6729032258064516 [2020-10-16 00:05:24,067 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2086 transitions. [2020-10-16 00:05:24,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2086 transitions. [2020-10-16 00:05:24,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:05:24,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2086 transitions. [2020-10-16 00:05:24,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 00:05:24,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 00:05:24,070 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 00:05:24,070 INFO L185 Difference]: Start difference. First operand has 750 places, 514 transitions, 22436 flow. Second operand 31 states and 2086 transitions. [2020-10-16 00:05:24,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 547 transitions, 26896 flow [2020-10-16 00:05:26,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 547 transitions, 26628 flow, removed 103 selfloop flow, removed 23 redundant places. [2020-10-16 00:05:26,506 INFO L241 Difference]: Finished difference. Result has 763 places, 520 transitions, 23109 flow [2020-10-16 00:05:26,506 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=22198, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=23109, PETRI_PLACES=763, PETRI_TRANSITIONS=520} [2020-10-16 00:05:26,506 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 745 predicate places. [2020-10-16 00:05:26,506 INFO L481 AbstractCegarLoop]: Abstraction has has 763 places, 520 transitions, 23109 flow [2020-10-16 00:05:26,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:05:26,507 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:05:26,507 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:05:26,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 00:05:26,707 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:05:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:05:26,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1372957636, now seen corresponding path program 128 times [2020-10-16 00:05:26,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:05:26,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840387374] [2020-10-16 00:05:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:05:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:27,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840387374] [2020-10-16 00:05:27,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721998647] [2020-10-16 00:05:27,058 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:27,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:05:27,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:05:27,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:05:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:05:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:27,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:05:27,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 00:05:27,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854914226] [2020-10-16 00:05:27,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 00:05:27,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:05:27,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 00:05:27,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-16 00:05:27,136 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:05:27,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 520 transitions, 23109 flow. Second operand 25 states. [2020-10-16 00:05:27,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:05:27,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:05:27,137 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:05:29,087 INFO L129 PetriNetUnfolder]: 503/1385 cut-off events. [2020-10-16 00:05:29,088 INFO L130 PetriNetUnfolder]: For 504165/504171 co-relation queries the response was YES. [2020-10-16 00:05:29,122 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37381 conditions, 1385 events. 503/1385 cut-off events. For 504165/504171 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8910 event pairs, 0 based on Foata normal form. 8/1393 useless extension candidates. Maximal degree in co-relation 37032. Up to 869 conditions per place. [2020-10-16 00:05:29,142 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 268 selfloop transitions, 284 changer transitions 0/559 dead transitions. [2020-10-16 00:05:29,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 559 transitions, 28150 flow [2020-10-16 00:05:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 00:05:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 00:05:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2425 transitions. [2020-10-16 00:05:29,144 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6736111111111112 [2020-10-16 00:05:29,144 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2425 transitions. [2020-10-16 00:05:29,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2425 transitions. [2020-10-16 00:05:29,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:05:29,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2425 transitions. [2020-10-16 00:05:29,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 00:05:29,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 00:05:29,147 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 00:05:29,147 INFO L185 Difference]: Start difference. First operand has 763 places, 520 transitions, 23109 flow. Second operand 36 states and 2425 transitions. [2020-10-16 00:05:29,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 559 transitions, 28150 flow [2020-10-16 00:05:31,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 774 places, 559 transitions, 27615 flow, removed 124 selfloop flow, removed 24 redundant places. [2020-10-16 00:05:31,565 INFO L241 Difference]: Finished difference. Result has 780 places, 528 transitions, 23909 flow [2020-10-16 00:05:31,566 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=22640, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=23909, PETRI_PLACES=780, PETRI_TRANSITIONS=528} [2020-10-16 00:05:31,566 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 762 predicate places. [2020-10-16 00:05:31,566 INFO L481 AbstractCegarLoop]: Abstraction has has 780 places, 528 transitions, 23909 flow [2020-10-16 00:05:31,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 00:05:31,566 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:05:31,566 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:05:31,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-16 00:05:31,780 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:05:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:05:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash 627753098, now seen corresponding path program 129 times [2020-10-16 00:05:31,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:05:31,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401809539] [2020-10-16 00:05:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:05:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:32,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401809539] [2020-10-16 00:05:32,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491833609] [2020-10-16 00:05:32,129 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:32,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 00:05:32,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:05:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:05:32,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:05:32,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:05:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:32,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:05:32,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 00:05:32,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753907599] [2020-10-16 00:05:32,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:05:32,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:05:32,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:05:32,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:05:32,245 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:05:32,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 528 transitions, 23909 flow. Second operand 26 states. [2020-10-16 00:05:32,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:05:32,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:05:32,246 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:05:34,428 INFO L129 PetriNetUnfolder]: 511/1409 cut-off events. [2020-10-16 00:05:34,428 INFO L130 PetriNetUnfolder]: For 512842/512844 co-relation queries the response was YES. [2020-10-16 00:05:34,468 INFO L80 FinitePrefix]: Finished finitePrefix Result has 38240 conditions, 1409 events. 511/1409 cut-off events. For 512842/512844 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 9110 event pairs, 0 based on Foata normal form. 4/1413 useless extension candidates. Maximal degree in co-relation 37885. Up to 885 conditions per place. [2020-10-16 00:05:34,487 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 204 selfloop transitions, 358 changer transitions 0/569 dead transitions. [2020-10-16 00:05:34,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 569 transitions, 29174 flow [2020-10-16 00:05:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 00:05:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 00:05:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2494 transitions. [2020-10-16 00:05:34,489 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674054054054054 [2020-10-16 00:05:34,489 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2494 transitions. [2020-10-16 00:05:34,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2494 transitions. [2020-10-16 00:05:34,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:05:34,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2494 transitions. [2020-10-16 00:05:34,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 00:05:34,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 00:05:34,493 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 00:05:34,493 INFO L185 Difference]: Start difference. First operand has 780 places, 528 transitions, 23909 flow. Second operand 37 states and 2494 transitions. [2020-10-16 00:05:34,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 569 transitions, 29174 flow [2020-10-16 00:05:37,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 791 places, 569 transitions, 28596 flow, removed 128 selfloop flow, removed 25 redundant places. [2020-10-16 00:05:37,291 INFO L241 Difference]: Finished difference. Result has 797 places, 536 transitions, 24863 flow [2020-10-16 00:05:37,292 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=23401, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=24863, PETRI_PLACES=797, PETRI_TRANSITIONS=536} [2020-10-16 00:05:37,292 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 779 predicate places. [2020-10-16 00:05:37,292 INFO L481 AbstractCegarLoop]: Abstraction has has 797 places, 536 transitions, 24863 flow [2020-10-16 00:05:37,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:05:37,292 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:05:37,292 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:05:37,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:37,498 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:05:37,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:05:37,498 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 130 times [2020-10-16 00:05:37,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:05:37,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878084833] [2020-10-16 00:05:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:05:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:37,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878084833] [2020-10-16 00:05:37,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259477829] [2020-10-16 00:05:37,832 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:37,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:05:37,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:05:37,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:05:37,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:05:37,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:05:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:37,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:05:37,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 00:05:37,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876799274] [2020-10-16 00:05:37,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:05:37,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:05:37,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:05:37,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:05:37,933 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:05:37,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 536 transitions, 24863 flow. Second operand 26 states. [2020-10-16 00:05:37,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:05:37,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:05:37,934 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:05:40,240 INFO L129 PetriNetUnfolder]: 513/1415 cut-off events. [2020-10-16 00:05:40,240 INFO L130 PetriNetUnfolder]: For 515830/515832 co-relation queries the response was YES. [2020-10-16 00:05:40,279 INFO L80 FinitePrefix]: Finished finitePrefix Result has 38677 conditions, 1415 events. 513/1415 cut-off events. For 515830/515832 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 9148 event pairs, 0 based on Foata normal form. 4/1419 useless extension candidates. Maximal degree in co-relation 38316. Up to 889 conditions per place. [2020-10-16 00:05:40,299 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 164 selfloop transitions, 402 changer transitions 0/573 dead transitions. [2020-10-16 00:05:40,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 573 transitions, 30035 flow [2020-10-16 00:05:40,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 00:05:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 00:05:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2630 transitions. [2020-10-16 00:05:40,302 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743589743589744 [2020-10-16 00:05:40,302 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2630 transitions. [2020-10-16 00:05:40,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2630 transitions. [2020-10-16 00:05:40,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:05:40,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2630 transitions. [2020-10-16 00:05:40,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-16 00:05:40,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-16 00:05:40,306 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-16 00:05:40,306 INFO L185 Difference]: Start difference. First operand has 797 places, 536 transitions, 24863 flow. Second operand 39 states and 2630 transitions. [2020-10-16 00:05:40,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 573 transitions, 30035 flow [2020-10-16 00:05:43,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 805 places, 573 transitions, 29256 flow, removed 128 selfloop flow, removed 30 redundant places. [2020-10-16 00:05:43,027 INFO L241 Difference]: Finished difference. Result has 807 places, 538 transitions, 25242 flow [2020-10-16 00:05:43,028 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=24158, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=25242, PETRI_PLACES=807, PETRI_TRANSITIONS=538} [2020-10-16 00:05:43,028 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 789 predicate places. [2020-10-16 00:05:43,028 INFO L481 AbstractCegarLoop]: Abstraction has has 807 places, 538 transitions, 25242 flow [2020-10-16 00:05:43,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:05:43,028 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:05:43,028 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:05:43,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:43,230 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:05:43,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:05:43,231 INFO L82 PathProgramCache]: Analyzing trace with hash -236236724, now seen corresponding path program 131 times [2020-10-16 00:05:43,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:05:43,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165064751] [2020-10-16 00:05:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:05:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:43,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165064751] [2020-10-16 00:05:43,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443633212] [2020-10-16 00:05:43,530 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:43,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 00:05:43,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:05:43,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:05:43,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:05:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:43,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:05:43,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 00:05:43,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427477098] [2020-10-16 00:05:43,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 00:05:43,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:05:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 00:05:43,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-10-16 00:05:43,632 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:05:43,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 807 places, 538 transitions, 25242 flow. Second operand 25 states. [2020-10-16 00:05:43,632 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:05:43,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:05:43,633 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:05:45,878 INFO L129 PetriNetUnfolder]: 517/1427 cut-off events. [2020-10-16 00:05:45,878 INFO L130 PetriNetUnfolder]: For 519654/519660 co-relation queries the response was YES. [2020-10-16 00:05:45,920 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39136 conditions, 1427 events. 517/1427 cut-off events. For 519654/519660 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 9226 event pairs, 0 based on Foata normal form. 8/1435 useless extension candidates. Maximal degree in co-relation 38773. Up to 897 conditions per place. [2020-10-16 00:05:45,940 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 116 selfloop transitions, 458 changer transitions 0/581 dead transitions. [2020-10-16 00:05:45,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 581 transitions, 30937 flow [2020-10-16 00:05:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 00:05:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 00:05:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2969 transitions. [2020-10-16 00:05:45,942 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6747727272727273 [2020-10-16 00:05:45,942 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2969 transitions. [2020-10-16 00:05:45,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2969 transitions. [2020-10-16 00:05:45,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:05:45,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2969 transitions. [2020-10-16 00:05:45,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-16 00:05:45,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-16 00:05:45,946 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-16 00:05:45,946 INFO L185 Difference]: Start difference. First operand has 807 places, 538 transitions, 25242 flow. Second operand 44 states and 2969 transitions. [2020-10-16 00:05:45,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 581 transitions, 30937 flow [2020-10-16 00:05:48,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 815 places, 581 transitions, 29969 flow, removed 130 selfloop flow, removed 35 redundant places. [2020-10-16 00:05:48,642 INFO L241 Difference]: Finished difference. Result has 817 places, 542 transitions, 25643 flow [2020-10-16 00:05:48,643 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=24356, PETRI_DIFFERENCE_MINUEND_PLACES=772, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=25643, PETRI_PLACES=817, PETRI_TRANSITIONS=542} [2020-10-16 00:05:48,643 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 799 predicate places. [2020-10-16 00:05:48,643 INFO L481 AbstractCegarLoop]: Abstraction has has 817 places, 542 transitions, 25643 flow [2020-10-16 00:05:48,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 00:05:48,643 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:05:48,643 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:05:48,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:48,844 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:05:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:05:48,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1956364368, now seen corresponding path program 132 times [2020-10-16 00:05:48,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:05:48,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963676299] [2020-10-16 00:05:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:05:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:49,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963676299] [2020-10-16 00:05:49,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409544808] [2020-10-16 00:05:49,154 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:49,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 00:05:49,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:05:49,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:05:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:05:49,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:05:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:49,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:05:49,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 00:05:49,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262084668] [2020-10-16 00:05:49,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:05:49,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:05:49,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:05:49,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:05:49,261 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:05:49,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 542 transitions, 25643 flow. Second operand 26 states. [2020-10-16 00:05:49,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:05:49,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:05:49,262 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:05:51,815 INFO L129 PetriNetUnfolder]: 521/1439 cut-off events. [2020-10-16 00:05:51,816 INFO L130 PetriNetUnfolder]: For 523243/523245 co-relation queries the response was YES. [2020-10-16 00:05:51,858 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39565 conditions, 1439 events. 521/1439 cut-off events. For 523243/523245 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 9353 event pairs, 0 based on Foata normal form. 4/1443 useless extension candidates. Maximal degree in co-relation 39200. Up to 905 conditions per place. [2020-10-16 00:05:51,878 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 112 selfloop transitions, 466 changer transitions 0/585 dead transitions. [2020-10-16 00:05:51,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 859 places, 585 transitions, 31339 flow [2020-10-16 00:05:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 00:05:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 00:05:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2902 transitions. [2020-10-16 00:05:51,881 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748837209302325 [2020-10-16 00:05:51,881 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2902 transitions. [2020-10-16 00:05:51,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2902 transitions. [2020-10-16 00:05:51,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:05:51,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2902 transitions. [2020-10-16 00:05:51,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 44 states. [2020-10-16 00:05:51,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 44 states. [2020-10-16 00:05:51,884 INFO L81 ComplementDD]: Finished complementDD. Result 44 states. [2020-10-16 00:05:51,884 INFO L185 Difference]: Start difference. First operand has 817 places, 542 transitions, 25643 flow. Second operand 43 states and 2902 transitions. [2020-10-16 00:05:51,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 859 places, 585 transitions, 31339 flow [2020-10-16 00:05:54,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 585 transitions, 30279 flow, removed 134 selfloop flow, removed 40 redundant places. [2020-10-16 00:05:54,595 INFO L241 Difference]: Finished difference. Result has 823 places, 546 transitions, 26073 flow [2020-10-16 00:05:54,595 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=24665, PETRI_DIFFERENCE_MINUEND_PLACES=777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=26073, PETRI_PLACES=823, PETRI_TRANSITIONS=546} [2020-10-16 00:05:54,595 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 805 predicate places. [2020-10-16 00:05:54,595 INFO L481 AbstractCegarLoop]: Abstraction has has 823 places, 546 transitions, 26073 flow [2020-10-16 00:05:54,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:05:54,596 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:05:54,596 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:05:54,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 00:05:54,809 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:05:54,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:05:54,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1485368658, now seen corresponding path program 133 times [2020-10-16 00:05:54,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:05:54,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056115114] [2020-10-16 00:05:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:05:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:55,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056115114] [2020-10-16 00:05:55,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376460787] [2020-10-16 00:05:55,116 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:05:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:05:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:05:55,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:05:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:05:55,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:05:55,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 00:05:55,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41846966] [2020-10-16 00:05:55,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 00:05:55,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:05:55,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 00:05:55,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-16 00:05:55,194 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:05:55,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 546 transitions, 26073 flow. Second operand 25 states. [2020-10-16 00:05:55,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:05:55,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:05:55,195 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:05:57,568 INFO L129 PetriNetUnfolder]: 529/1461 cut-off events. [2020-10-16 00:05:57,568 INFO L130 PetriNetUnfolder]: For 531467/531469 co-relation queries the response was YES. [2020-10-16 00:05:57,611 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40305 conditions, 1461 events. 529/1461 cut-off events. For 531467/531469 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9523 event pairs, 0 based on Foata normal form. 4/1465 useless extension candidates. Maximal degree in co-relation 39936. Up to 921 conditions per place. [2020-10-16 00:05:57,631 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 102 selfloop transitions, 487 changer transitions 0/596 dead transitions. [2020-10-16 00:05:57,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 868 places, 596 transitions, 32252 flow [2020-10-16 00:05:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-16 00:05:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 00:05:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3105 transitions. [2020-10-16 00:05:57,634 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:05:57,634 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3105 transitions. [2020-10-16 00:05:57,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3105 transitions. [2020-10-16 00:05:57,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:05:57,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3105 transitions. [2020-10-16 00:05:57,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-16 00:05:57,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-16 00:05:57,638 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-16 00:05:57,638 INFO L185 Difference]: Start difference. First operand has 823 places, 546 transitions, 26073 flow. Second operand 46 states and 3105 transitions. [2020-10-16 00:05:57,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 868 places, 596 transitions, 32252 flow [2020-10-16 00:06:00,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 828 places, 596 transitions, 31188 flow, removed 137 selfloop flow, removed 40 redundant places. [2020-10-16 00:06:00,459 INFO L241 Difference]: Finished difference. Result has 832 places, 555 transitions, 26757 flow [2020-10-16 00:06:00,459 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=25101, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=26757, PETRI_PLACES=832, PETRI_TRANSITIONS=555} [2020-10-16 00:06:00,460 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 814 predicate places. [2020-10-16 00:06:00,460 INFO L481 AbstractCegarLoop]: Abstraction has has 832 places, 555 transitions, 26757 flow [2020-10-16 00:06:00,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 00:06:00,460 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:06:00,460 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:06:00,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:00,674 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:06:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:06:00,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 134 times [2020-10-16 00:06:00,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:06:00,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477228856] [2020-10-16 00:06:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:06:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:06:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:00,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477228856] [2020-10-16 00:06:00,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360524568] [2020-10-16 00:06:00,983 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:01,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:06:01,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:06:01,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:06:01,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:06:01,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:06:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:01,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:06:01,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 00:06:01,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236933747] [2020-10-16 00:06:01,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:06:01,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:06:01,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:06:01,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:06:01,091 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:06:01,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 832 places, 555 transitions, 26757 flow. Second operand 26 states. [2020-10-16 00:06:01,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:06:01,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:06:01,091 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:06:03,754 INFO L129 PetriNetUnfolder]: 533/1473 cut-off events. [2020-10-16 00:06:03,754 INFO L130 PetriNetUnfolder]: For 546553/546555 co-relation queries the response was YES. [2020-10-16 00:06:03,798 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40980 conditions, 1473 events. 533/1473 cut-off events. For 546553/546555 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9615 event pairs, 0 based on Foata normal form. 4/1477 useless extension candidates. Maximal degree in co-relation 40607. Up to 929 conditions per place. [2020-10-16 00:06:03,819 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 101 selfloop transitions, 492 changer transitions 0/600 dead transitions. [2020-10-16 00:06:03,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 876 places, 600 transitions, 32748 flow [2020-10-16 00:06:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-16 00:06:03,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 00:06:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3038 transitions. [2020-10-16 00:06:03,822 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751111111111111 [2020-10-16 00:06:03,822 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3038 transitions. [2020-10-16 00:06:03,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3038 transitions. [2020-10-16 00:06:03,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:06:03,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3038 transitions. [2020-10-16 00:06:03,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 46 states. [2020-10-16 00:06:03,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 46 states. [2020-10-16 00:06:03,825 INFO L81 ComplementDD]: Finished complementDD. Result 46 states. [2020-10-16 00:06:03,825 INFO L185 Difference]: Start difference. First operand has 832 places, 555 transitions, 26757 flow. Second operand 45 states and 3038 transitions. [2020-10-16 00:06:03,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 876 places, 600 transitions, 32748 flow [2020-10-16 00:06:07,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 834 places, 600 transitions, 31504 flow, removed 183 selfloop flow, removed 42 redundant places. [2020-10-16 00:06:07,197 INFO L241 Difference]: Finished difference. Result has 836 places, 559 transitions, 26934 flow [2020-10-16 00:06:07,197 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=25555, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=26934, PETRI_PLACES=836, PETRI_TRANSITIONS=559} [2020-10-16 00:06:07,198 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 818 predicate places. [2020-10-16 00:06:07,198 INFO L481 AbstractCegarLoop]: Abstraction has has 836 places, 559 transitions, 26934 flow [2020-10-16 00:06:07,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:06:07,198 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:06:07,198 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:06:07,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 00:06:07,399 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:06:07,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:06:07,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 135 times [2020-10-16 00:06:07,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:06:07,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304029262] [2020-10-16 00:06:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:06:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:06:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:07,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304029262] [2020-10-16 00:06:07,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246167245] [2020-10-16 00:06:07,719 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:07,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 00:06:07,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:06:07,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:06:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:06:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:07,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:06:07,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 00:06:07,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214597506] [2020-10-16 00:06:07,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 00:06:07,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:06:07,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 00:06:07,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-16 00:06:07,810 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:06:07,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 836 places, 559 transitions, 26934 flow. Second operand 25 states. [2020-10-16 00:06:07,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:06:07,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:06:07,811 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:06:10,328 INFO L129 PetriNetUnfolder]: 542/1494 cut-off events. [2020-10-16 00:06:10,328 INFO L130 PetriNetUnfolder]: For 567472/567474 co-relation queries the response was YES. [2020-10-16 00:06:10,373 INFO L80 FinitePrefix]: Finished finitePrefix Result has 41979 conditions, 1494 events. 542/1494 cut-off events. For 567472/567474 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9699 event pairs, 0 based on Foata normal form. 4/1498 useless extension candidates. Maximal degree in co-relation 41604. Up to 939 conditions per place. [2020-10-16 00:06:10,394 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 92 selfloop transitions, 510 changer transitions 0/609 dead transitions. [2020-10-16 00:06:10,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 609 transitions, 33664 flow [2020-10-16 00:06:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-16 00:06:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 00:06:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3242 transitions. [2020-10-16 00:06:10,397 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754166666666667 [2020-10-16 00:06:10,397 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3242 transitions. [2020-10-16 00:06:10,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3242 transitions. [2020-10-16 00:06:10,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:06:10,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3242 transitions. [2020-10-16 00:06:10,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-16 00:06:10,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-16 00:06:10,401 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-16 00:06:10,401 INFO L185 Difference]: Start difference. First operand has 836 places, 559 transitions, 26934 flow. Second operand 48 states and 3242 transitions. [2020-10-16 00:06:10,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 883 places, 609 transitions, 33664 flow [2020-10-16 00:06:13,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 609 transitions, 32438 flow, removed 170 selfloop flow, removed 42 redundant places. [2020-10-16 00:06:13,565 INFO L241 Difference]: Finished difference. Result has 845 places, 565 transitions, 27628 flow [2020-10-16 00:06:13,566 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=25858, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=504, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=27628, PETRI_PLACES=845, PETRI_TRANSITIONS=565} [2020-10-16 00:06:13,566 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 827 predicate places. [2020-10-16 00:06:13,566 INFO L481 AbstractCegarLoop]: Abstraction has has 845 places, 565 transitions, 27628 flow [2020-10-16 00:06:13,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 00:06:13,566 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:06:13,566 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:06:13,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 00:06:13,767 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:06:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:06:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1468774668, now seen corresponding path program 136 times [2020-10-16 00:06:13,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:06:13,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232123814] [2020-10-16 00:06:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:06:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:06:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:14,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232123814] [2020-10-16 00:06:14,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846586637] [2020-10-16 00:06:14,110 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:14,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:06:14,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:06:14,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 00:06:14,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:06:14,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:06:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:14,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:06:14,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 00:06:14,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093652796] [2020-10-16 00:06:14,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:06:14,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:06:14,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:06:14,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:06:14,209 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:06:14,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 845 places, 565 transitions, 27628 flow. Second operand 26 states. [2020-10-16 00:06:14,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:06:14,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:06:14,209 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:06:16,913 INFO L129 PetriNetUnfolder]: 539/1488 cut-off events. [2020-10-16 00:06:16,913 INFO L130 PetriNetUnfolder]: For 585526/585532 co-relation queries the response was YES. [2020-10-16 00:06:16,959 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42245 conditions, 1488 events. 539/1488 cut-off events. For 585526/585532 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9702 event pairs, 0 based on Foata normal form. 8/1496 useless extension candidates. Maximal degree in co-relation 41866. Up to 935 conditions per place. [2020-10-16 00:06:16,980 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 92 selfloop transitions, 510 changer transitions 0/609 dead transitions. [2020-10-16 00:06:16,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 891 places, 609 transitions, 33818 flow [2020-10-16 00:06:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 00:06:16,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 00:06:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3174 transitions. [2020-10-16 00:06:16,984 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753191489361702 [2020-10-16 00:06:16,984 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3174 transitions. [2020-10-16 00:06:16,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3174 transitions. [2020-10-16 00:06:16,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:06:16,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3174 transitions. [2020-10-16 00:06:16,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-16 00:06:16,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-16 00:06:16,989 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-16 00:06:16,989 INFO L185 Difference]: Start difference. First operand has 845 places, 565 transitions, 27628 flow. Second operand 47 states and 3174 transitions. [2020-10-16 00:06:16,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 891 places, 609 transitions, 33818 flow [2020-10-16 00:06:20,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 848 places, 609 transitions, 32414 flow, removed 252 selfloop flow, removed 43 redundant places. [2020-10-16 00:06:20,764 INFO L241 Difference]: Finished difference. Result has 850 places, 566 transitions, 27484 flow [2020-10-16 00:06:20,764 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=26224, PETRI_DIFFERENCE_MINUEND_PLACES=802, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=27484, PETRI_PLACES=850, PETRI_TRANSITIONS=566} [2020-10-16 00:06:20,765 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 832 predicate places. [2020-10-16 00:06:20,765 INFO L481 AbstractCegarLoop]: Abstraction has has 850 places, 566 transitions, 27484 flow [2020-10-16 00:06:20,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:06:20,765 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:06:20,765 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:06:20,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-16 00:06:20,966 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:06:20,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:06:20,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1350895079, now seen corresponding path program 137 times [2020-10-16 00:06:20,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:06:20,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131326718] [2020-10-16 00:06:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:06:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:06:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:21,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131326718] [2020-10-16 00:06:21,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869630545] [2020-10-16 00:06:21,437 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:21,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 00:06:21,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:06:21,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:06:21,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:06:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:21,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:06:21,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 00:06:21,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44604483] [2020-10-16 00:06:21,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:06:21,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:06:21,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:06:21,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:06:21,508 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:06:21,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 566 transitions, 27484 flow. Second operand 26 states. [2020-10-16 00:06:21,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:06:21,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:06:21,509 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:06:23,353 INFO L129 PetriNetUnfolder]: 541/1494 cut-off events. [2020-10-16 00:06:23,353 INFO L130 PetriNetUnfolder]: For 598508/598510 co-relation queries the response was YES. [2020-10-16 00:06:23,399 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42563 conditions, 1494 events. 541/1494 cut-off events. For 598508/598510 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9760 event pairs, 0 based on Foata normal form. 2/1496 useless extension candidates. Maximal degree in co-relation 42182. Up to 937 conditions per place. [2020-10-16 00:06:23,420 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 508 selfloop transitions, 78 changer transitions 0/593 dead transitions. [2020-10-16 00:06:23,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 877 places, 593 transitions, 31726 flow [2020-10-16 00:06:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 00:06:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 00:06:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1881 transitions. [2020-10-16 00:06:23,422 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6717857142857143 [2020-10-16 00:06:23,422 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1881 transitions. [2020-10-16 00:06:23,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1881 transitions. [2020-10-16 00:06:23,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:06:23,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1881 transitions. [2020-10-16 00:06:23,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-16 00:06:23,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-16 00:06:23,425 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-16 00:06:23,425 INFO L185 Difference]: Start difference. First operand has 850 places, 566 transitions, 27484 flow. Second operand 28 states and 1881 transitions. [2020-10-16 00:06:23,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 877 places, 593 transitions, 31726 flow [2020-10-16 00:06:27,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 593 transitions, 30578 flow, removed 94 selfloop flow, removed 44 redundant places. [2020-10-16 00:06:27,103 INFO L241 Difference]: Finished difference. Result has 835 places, 568 transitions, 26810 flow [2020-10-16 00:06:27,104 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=26416, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=26810, PETRI_PLACES=835, PETRI_TRANSITIONS=568} [2020-10-16 00:06:27,104 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 817 predicate places. [2020-10-16 00:06:27,104 INFO L481 AbstractCegarLoop]: Abstraction has has 835 places, 568 transitions, 26810 flow [2020-10-16 00:06:27,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:06:27,104 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:06:27,104 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:06:27,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:27,305 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:06:27,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:06:27,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1564388865, now seen corresponding path program 138 times [2020-10-16 00:06:27,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:06:27,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591032579] [2020-10-16 00:06:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:06:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:06:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:27,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591032579] [2020-10-16 00:06:27,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640147819] [2020-10-16 00:06:27,773 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:27,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 00:06:27,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:06:27,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:06:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:06:27,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:06:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:27,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:06:27,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 00:06:27,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404046550] [2020-10-16 00:06:27,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:06:27,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:06:27,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:06:27,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:06:27,880 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:06:27,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 835 places, 568 transitions, 26810 flow. Second operand 27 states. [2020-10-16 00:06:27,881 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:06:27,881 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:06:27,881 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:06:29,835 INFO L129 PetriNetUnfolder]: 549/1518 cut-off events. [2020-10-16 00:06:29,836 INFO L130 PetriNetUnfolder]: For 596966/596972 co-relation queries the response was YES. [2020-10-16 00:06:29,882 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42675 conditions, 1518 events. 549/1518 cut-off events. For 596966/596972 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9966 event pairs, 0 based on Foata normal form. 8/1526 useless extension candidates. Maximal degree in co-relation 42292. Up to 953 conditions per place. [2020-10-16 00:06:29,904 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 474 selfloop transitions, 120 changer transitions 0/601 dead transitions. [2020-10-16 00:06:29,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 863 places, 601 transitions, 31420 flow [2020-10-16 00:06:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 00:06:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-16 00:06:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1949 transitions. [2020-10-16 00:06:29,906 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6720689655172414 [2020-10-16 00:06:29,906 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1949 transitions. [2020-10-16 00:06:29,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1949 transitions. [2020-10-16 00:06:29,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:06:29,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1949 transitions. [2020-10-16 00:06:29,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-16 00:06:29,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-16 00:06:29,909 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-16 00:06:29,909 INFO L185 Difference]: Start difference. First operand has 835 places, 568 transitions, 26810 flow. Second operand 29 states and 1949 transitions. [2020-10-16 00:06:29,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 863 places, 601 transitions, 31420 flow [2020-10-16 00:06:33,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 601 transitions, 31066 flow, removed 103 selfloop flow, removed 25 redundant places. [2020-10-16 00:06:33,450 INFO L241 Difference]: Finished difference. Result has 842 places, 576 transitions, 27376 flow [2020-10-16 00:06:33,451 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=26482, PETRI_DIFFERENCE_MINUEND_PLACES=810, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=27376, PETRI_PLACES=842, PETRI_TRANSITIONS=576} [2020-10-16 00:06:33,451 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 824 predicate places. [2020-10-16 00:06:33,451 INFO L481 AbstractCegarLoop]: Abstraction has has 842 places, 576 transitions, 27376 flow [2020-10-16 00:06:33,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:06:33,452 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:06:33,452 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:06:33,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 00:06:33,665 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:06:33,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:06:33,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1550678861, now seen corresponding path program 139 times [2020-10-16 00:06:33,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:06:33,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424189802] [2020-10-16 00:06:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:06:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:06:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:34,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424189802] [2020-10-16 00:06:34,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013119476] [2020-10-16 00:06:34,119 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:06:34,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:06:34,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:06:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:34,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:06:34,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 00:06:34,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53096498] [2020-10-16 00:06:34,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:06:34,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:06:34,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:06:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:06:34,203 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:06:34,204 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 842 places, 576 transitions, 27376 flow. Second operand 26 states. [2020-10-16 00:06:34,204 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:06:34,204 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:06:34,204 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:06:36,240 INFO L129 PetriNetUnfolder]: 557/1542 cut-off events. [2020-10-16 00:06:36,240 INFO L130 PetriNetUnfolder]: For 618745/618751 co-relation queries the response was YES. [2020-10-16 00:06:36,330 INFO L80 FinitePrefix]: Finished finitePrefix Result has 43711 conditions, 1542 events. 557/1542 cut-off events. For 618745/618751 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 10157 event pairs, 0 based on Foata normal form. 5/1547 useless extension candidates. Maximal degree in co-relation 43324. Up to 969 conditions per place. [2020-10-16 00:06:36,374 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 432 selfloop transitions, 172 changer transitions 0/611 dead transitions. [2020-10-16 00:06:36,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 871 places, 611 transitions, 32274 flow [2020-10-16 00:06:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 00:06:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-16 00:06:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2017 transitions. [2020-10-16 00:06:36,377 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6723333333333333 [2020-10-16 00:06:36,377 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2017 transitions. [2020-10-16 00:06:36,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2017 transitions. [2020-10-16 00:06:36,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:06:36,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2017 transitions. [2020-10-16 00:06:36,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-16 00:06:36,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-16 00:06:36,381 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-16 00:06:36,381 INFO L185 Difference]: Start difference. First operand has 842 places, 576 transitions, 27376 flow. Second operand 30 states and 2017 transitions. [2020-10-16 00:06:36,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 871 places, 611 transitions, 32274 flow [2020-10-16 00:06:40,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 847 places, 611 transitions, 31800 flow, removed 133 selfloop flow, removed 24 redundant places. [2020-10-16 00:06:40,455 INFO L241 Difference]: Finished difference. Result has 851 places, 584 transitions, 27986 flow [2020-10-16 00:06:40,456 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=26972, PETRI_DIFFERENCE_MINUEND_PLACES=818, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=27986, PETRI_PLACES=851, PETRI_TRANSITIONS=584} [2020-10-16 00:06:40,456 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 833 predicate places. [2020-10-16 00:06:40,456 INFO L481 AbstractCegarLoop]: Abstraction has has 851 places, 584 transitions, 27986 flow [2020-10-16 00:06:40,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:06:40,456 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:06:40,456 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:06:40,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:40,657 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:06:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:06:40,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1022539031, now seen corresponding path program 140 times [2020-10-16 00:06:40,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:06:40,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718812587] [2020-10-16 00:06:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:06:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:06:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:41,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718812587] [2020-10-16 00:06:41,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446745194] [2020-10-16 00:06:41,101 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:41,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:06:41,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:06:41,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:06:41,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:06:41,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:06:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:41,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:06:41,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 00:06:41,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101957322] [2020-10-16 00:06:41,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:06:41,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:06:41,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:06:41,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:06:41,196 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:06:41,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 584 transitions, 27986 flow. Second operand 27 states. [2020-10-16 00:06:41,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:06:41,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:06:41,196 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:06:43,367 INFO L129 PetriNetUnfolder]: 561/1554 cut-off events. [2020-10-16 00:06:43,367 INFO L130 PetriNetUnfolder]: For 622755/622757 co-relation queries the response was YES. [2020-10-16 00:06:43,415 INFO L80 FinitePrefix]: Finished finitePrefix Result has 44121 conditions, 1554 events. 561/1554 cut-off events. For 622755/622757 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 10246 event pairs, 0 based on Foata normal form. 4/1558 useless extension candidates. Maximal degree in co-relation 43730. Up to 977 conditions per place. [2020-10-16 00:06:43,438 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 398 selfloop transitions, 210 changer transitions 0/615 dead transitions. [2020-10-16 00:06:43,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 881 places, 615 transitions, 32613 flow [2020-10-16 00:06:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 00:06:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 00:06:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2085 transitions. [2020-10-16 00:06:43,440 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6725806451612903 [2020-10-16 00:06:43,440 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2085 transitions. [2020-10-16 00:06:43,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2085 transitions. [2020-10-16 00:06:43,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:06:43,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2085 transitions. [2020-10-16 00:06:43,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 00:06:43,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 00:06:43,442 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 00:06:43,442 INFO L185 Difference]: Start difference. First operand has 851 places, 584 transitions, 27986 flow. Second operand 31 states and 2085 transitions. [2020-10-16 00:06:43,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 881 places, 615 transitions, 32613 flow [2020-10-16 00:06:47,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 856 places, 615 transitions, 32059 flow, removed 129 selfloop flow, removed 25 redundant places. [2020-10-16 00:06:47,599 INFO L241 Difference]: Finished difference. Result has 858 places, 588 transitions, 28289 flow [2020-10-16 00:06:47,599 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=27494, PETRI_DIFFERENCE_MINUEND_PLACES=826, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=28289, PETRI_PLACES=858, PETRI_TRANSITIONS=588} [2020-10-16 00:06:47,599 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 840 predicate places. [2020-10-16 00:06:47,599 INFO L481 AbstractCegarLoop]: Abstraction has has 858 places, 588 transitions, 28289 flow [2020-10-16 00:06:47,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:06:47,599 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:06:47,600 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:06:47,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:47,800 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:06:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:06:47,801 INFO L82 PathProgramCache]: Analyzing trace with hash -161385579, now seen corresponding path program 141 times [2020-10-16 00:06:47,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:06:47,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434977896] [2020-10-16 00:06:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:06:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:06:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:48,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434977896] [2020-10-16 00:06:48,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821441545] [2020-10-16 00:06:48,209 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:48,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 00:06:48,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:06:48,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:06:48,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:06:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:48,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:06:48,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 00:06:48,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804305369] [2020-10-16 00:06:48,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:06:48,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:06:48,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:06:48,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:06:48,290 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:06:48,291 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 858 places, 588 transitions, 28289 flow. Second operand 26 states. [2020-10-16 00:06:48,291 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:06:48,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:06:48,291 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:06:50,395 INFO L129 PetriNetUnfolder]: 571/1584 cut-off events. [2020-10-16 00:06:50,396 INFO L130 PetriNetUnfolder]: For 633710/633712 co-relation queries the response was YES. [2020-10-16 00:06:50,444 INFO L80 FinitePrefix]: Finished finitePrefix Result has 45079 conditions, 1584 events. 571/1584 cut-off events. For 633710/633712 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 10495 event pairs, 0 based on Foata normal form. 2/1586 useless extension candidates. Maximal degree in co-relation 44686. Up to 997 conditions per place. [2020-10-16 00:06:50,467 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 362 selfloop transitions, 258 changer transitions 0/627 dead transitions. [2020-10-16 00:06:50,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 889 places, 627 transitions, 33575 flow [2020-10-16 00:06:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 00:06:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 00:06:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2153 transitions. [2020-10-16 00:06:50,470 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6728125 [2020-10-16 00:06:50,470 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2153 transitions. [2020-10-16 00:06:50,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2153 transitions. [2020-10-16 00:06:50,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:06:50,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2153 transitions. [2020-10-16 00:06:50,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 00:06:50,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 00:06:50,472 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 00:06:50,472 INFO L185 Difference]: Start difference. First operand has 858 places, 588 transitions, 28289 flow. Second operand 32 states and 2153 transitions. [2020-10-16 00:06:50,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 889 places, 627 transitions, 33575 flow [2020-10-16 00:06:54,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 861 places, 627 transitions, 32933 flow, removed 127 selfloop flow, removed 28 redundant places. [2020-10-16 00:06:54,706 INFO L241 Difference]: Finished difference. Result has 867 places, 598 transitions, 29112 flow [2020-10-16 00:06:54,707 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=27713, PETRI_DIFFERENCE_MINUEND_PLACES=830, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=29112, PETRI_PLACES=867, PETRI_TRANSITIONS=598} [2020-10-16 00:06:54,707 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 849 predicate places. [2020-10-16 00:06:54,707 INFO L481 AbstractCegarLoop]: Abstraction has has 867 places, 598 transitions, 29112 flow [2020-10-16 00:06:54,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:06:54,707 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:06:54,707 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:06:54,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:54,916 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:06:54,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:06:54,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1684707137, now seen corresponding path program 142 times [2020-10-16 00:06:54,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:06:54,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784516996] [2020-10-16 00:06:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:06:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:06:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:55,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784516996] [2020-10-16 00:06:55,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348762687] [2020-10-16 00:06:55,318 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:06:55,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:06:55,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:06:55,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:06:55,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:06:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:06:55,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:06:55,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 00:06:55,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674583353] [2020-10-16 00:06:55,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:06:55,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:06:55,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:06:55,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:06:55,387 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:06:55,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 867 places, 598 transitions, 29112 flow. Second operand 26 states. [2020-10-16 00:06:55,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:06:55,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:06:55,388 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:06:57,650 INFO L129 PetriNetUnfolder]: 575/1596 cut-off events. [2020-10-16 00:06:57,650 INFO L130 PetriNetUnfolder]: For 638723/638729 co-relation queries the response was YES. [2020-10-16 00:06:57,701 INFO L80 FinitePrefix]: Finished finitePrefix Result has 45528 conditions, 1596 events. 575/1596 cut-off events. For 638723/638729 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 10613 event pairs, 0 based on Foata normal form. 5/1601 useless extension candidates. Maximal degree in co-relation 45129. Up to 1005 conditions per place. [2020-10-16 00:06:57,724 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 298 selfloop transitions, 328 changer transitions 0/633 dead transitions. [2020-10-16 00:06:57,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 633 transitions, 34221 flow [2020-10-16 00:06:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 00:06:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 00:06:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2289 transitions. [2020-10-16 00:06:57,726 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.673235294117647 [2020-10-16 00:06:57,726 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2289 transitions. [2020-10-16 00:06:57,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2289 transitions. [2020-10-16 00:06:57,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:06:57,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2289 transitions. [2020-10-16 00:06:57,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-16 00:06:57,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-16 00:06:57,729 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-16 00:06:57,729 INFO L185 Difference]: Start difference. First operand has 867 places, 598 transitions, 29112 flow. Second operand 34 states and 2289 transitions. [2020-10-16 00:06:57,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 900 places, 633 transitions, 34221 flow [2020-10-16 00:07:02,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 875 places, 633 transitions, 33568 flow, removed 129 selfloop flow, removed 25 redundant places. [2020-10-16 00:07:02,234 INFO L241 Difference]: Finished difference. Result has 877 places, 602 transitions, 29570 flow [2020-10-16 00:07:02,235 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=28525, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=29570, PETRI_PLACES=877, PETRI_TRANSITIONS=602} [2020-10-16 00:07:02,235 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 859 predicate places. [2020-10-16 00:07:02,235 INFO L481 AbstractCegarLoop]: Abstraction has has 877 places, 602 transitions, 29570 flow [2020-10-16 00:07:02,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:07:02,235 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:07:02,235 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:07:02,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:07:02,449 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:07:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:07:02,450 INFO L82 PathProgramCache]: Analyzing trace with hash 473085275, now seen corresponding path program 143 times [2020-10-16 00:07:02,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:07:02,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047745554] [2020-10-16 00:07:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:07:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:07:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:02,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047745554] [2020-10-16 00:07:02,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526266243] [2020-10-16 00:07:02,853 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:07:02,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 00:07:02,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:07:02,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:07:02,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:07:02,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:07:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:02,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:07:02,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 00:07:02,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721365005] [2020-10-16 00:07:02,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:07:02,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:07:02,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:07:02,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:07:02,968 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:07:02,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 877 places, 602 transitions, 29570 flow. Second operand 27 states. [2020-10-16 00:07:02,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:07:02,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:07:02,969 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:07:05,666 INFO L129 PetriNetUnfolder]: 591/1644 cut-off events. [2020-10-16 00:07:05,666 INFO L130 PetriNetUnfolder]: For 657172/657174 co-relation queries the response was YES. [2020-10-16 00:07:05,718 INFO L80 FinitePrefix]: Finished finitePrefix Result has 47078 conditions, 1644 events. 591/1644 cut-off events. For 657172/657174 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 11047 event pairs, 0 based on Foata normal form. 4/1648 useless extension candidates. Maximal degree in co-relation 46677. Up to 1037 conditions per place. [2020-10-16 00:07:05,741 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 284 selfloop transitions, 358 changer transitions 0/649 dead transitions. [2020-10-16 00:07:05,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 911 places, 649 transitions, 35428 flow [2020-10-16 00:07:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 00:07:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 00:07:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2357 transitions. [2020-10-16 00:07:05,746 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734285714285714 [2020-10-16 00:07:05,746 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2357 transitions. [2020-10-16 00:07:05,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2357 transitions. [2020-10-16 00:07:05,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:07:05,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2357 transitions. [2020-10-16 00:07:05,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 00:07:05,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 00:07:05,750 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 00:07:05,750 INFO L185 Difference]: Start difference. First operand has 877 places, 602 transitions, 29570 flow. Second operand 35 states and 2357 transitions. [2020-10-16 00:07:05,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 911 places, 649 transitions, 35428 flow [2020-10-16 00:07:09,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 881 places, 649 transitions, 34596 flow, removed 127 selfloop flow, removed 30 redundant places. [2020-10-16 00:07:09,756 INFO L241 Difference]: Finished difference. Result has 893 places, 618 transitions, 30980 flow [2020-10-16 00:07:09,757 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=28804, PETRI_DIFFERENCE_MINUEND_PLACES=847, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=30980, PETRI_PLACES=893, PETRI_TRANSITIONS=618} [2020-10-16 00:07:09,757 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 875 predicate places. [2020-10-16 00:07:09,757 INFO L481 AbstractCegarLoop]: Abstraction has has 893 places, 618 transitions, 30980 flow [2020-10-16 00:07:09,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:07:09,757 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:07:09,757 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:07:09,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:07:09,958 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:07:09,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:07:09,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1492282745, now seen corresponding path program 144 times [2020-10-16 00:07:09,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:07:09,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360266915] [2020-10-16 00:07:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:07:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:07:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:10,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360266915] [2020-10-16 00:07:10,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16538815] [2020-10-16 00:07:10,347 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:07:10,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 00:07:10,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:07:10,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:07:10,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:07:10,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:07:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:10,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:07:10,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 00:07:10,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81235421] [2020-10-16 00:07:10,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:07:10,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:07:10,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:07:10,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:07:10,457 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:07:10,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 893 places, 618 transitions, 30980 flow. Second operand 27 states. [2020-10-16 00:07:10,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:07:10,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:07:10,458 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:07:13,362 INFO L129 PetriNetUnfolder]: 595/1656 cut-off events. [2020-10-16 00:07:13,362 INFO L130 PetriNetUnfolder]: For 664334/664336 co-relation queries the response was YES. [2020-10-16 00:07:13,406 INFO L80 FinitePrefix]: Finished finitePrefix Result has 47673 conditions, 1656 events. 595/1656 cut-off events. For 664334/664336 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 11149 event pairs, 0 based on Foata normal form. 4/1660 useless extension candidates. Maximal degree in co-relation 47260. Up to 1045 conditions per place. [2020-10-16 00:07:13,430 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 230 selfloop transitions, 418 changer transitions 0/655 dead transitions. [2020-10-16 00:07:13,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 929 places, 655 transitions, 36355 flow [2020-10-16 00:07:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 00:07:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 00:07:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2493 transitions. [2020-10-16 00:07:13,432 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6737837837837838 [2020-10-16 00:07:13,432 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2493 transitions. [2020-10-16 00:07:13,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2493 transitions. [2020-10-16 00:07:13,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:07:13,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2493 transitions. [2020-10-16 00:07:13,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 00:07:13,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 00:07:13,435 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 00:07:13,435 INFO L185 Difference]: Start difference. First operand has 893 places, 618 transitions, 30980 flow. Second operand 37 states and 2493 transitions. [2020-10-16 00:07:13,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 929 places, 655 transitions, 36355 flow [2020-10-16 00:07:17,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 907 places, 655 transitions, 35763 flow, removed 129 selfloop flow, removed 22 redundant places. [2020-10-16 00:07:17,448 INFO L241 Difference]: Finished difference. Result has 909 places, 622 transitions, 31697 flow [2020-10-16 00:07:17,448 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=30458, PETRI_DIFFERENCE_MINUEND_PLACES=871, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=31697, PETRI_PLACES=909, PETRI_TRANSITIONS=622} [2020-10-16 00:07:17,448 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 891 predicate places. [2020-10-16 00:07:17,449 INFO L481 AbstractCegarLoop]: Abstraction has has 909 places, 622 transitions, 31697 flow [2020-10-16 00:07:17,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:07:17,449 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:07:17,449 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:07:17,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 00:07:17,657 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:07:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:07:17,657 INFO L82 PathProgramCache]: Analyzing trace with hash -803960955, now seen corresponding path program 145 times [2020-10-16 00:07:17,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:07:17,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519395463] [2020-10-16 00:07:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:07:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:07:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:18,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519395463] [2020-10-16 00:07:18,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341071052] [2020-10-16 00:07:18,032 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:07:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:07:18,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:07:18,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:07:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:18,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:07:18,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 00:07:18,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277446464] [2020-10-16 00:07:18,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:07:18,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:07:18,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:07:18,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:07:18,105 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:07:18,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 909 places, 622 transitions, 31697 flow. Second operand 26 states. [2020-10-16 00:07:18,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:07:18,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:07:18,106 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:07:20,696 INFO L129 PetriNetUnfolder]: 599/1668 cut-off events. [2020-10-16 00:07:20,696 INFO L130 PetriNetUnfolder]: For 668575/668577 co-relation queries the response was YES. [2020-10-16 00:07:20,752 INFO L80 FinitePrefix]: Finished finitePrefix Result has 48277 conditions, 1668 events. 599/1668 cut-off events. For 668575/668577 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 11258 event pairs, 0 based on Foata normal form. 2/1670 useless extension candidates. Maximal degree in co-relation 47862. Up to 1053 conditions per place. [2020-10-16 00:07:20,775 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 200 selfloop transitions, 454 changer transitions 0/661 dead transitions. [2020-10-16 00:07:20,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 946 places, 661 transitions, 37316 flow [2020-10-16 00:07:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 00:07:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 00:07:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2561 transitions. [2020-10-16 00:07:20,778 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6739473684210526 [2020-10-16 00:07:20,778 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2561 transitions. [2020-10-16 00:07:20,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2561 transitions. [2020-10-16 00:07:20,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:07:20,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2561 transitions. [2020-10-16 00:07:20,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 39 states. [2020-10-16 00:07:20,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 39 states. [2020-10-16 00:07:20,781 INFO L81 ComplementDD]: Finished complementDD. Result 39 states. [2020-10-16 00:07:20,782 INFO L185 Difference]: Start difference. First operand has 909 places, 622 transitions, 31697 flow. Second operand 38 states and 2561 transitions. [2020-10-16 00:07:20,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 946 places, 661 transitions, 37316 flow [2020-10-16 00:07:25,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 911 places, 661 transitions, 36264 flow, removed 131 selfloop flow, removed 35 redundant places. [2020-10-16 00:07:25,060 INFO L241 Difference]: Finished difference. Result has 913 places, 626 transitions, 32042 flow [2020-10-16 00:07:25,061 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=30719, PETRI_DIFFERENCE_MINUEND_PLACES=874, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=32042, PETRI_PLACES=913, PETRI_TRANSITIONS=626} [2020-10-16 00:07:25,061 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 895 predicate places. [2020-10-16 00:07:25,061 INFO L481 AbstractCegarLoop]: Abstraction has has 913 places, 626 transitions, 32042 flow [2020-10-16 00:07:25,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:07:25,061 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:07:25,061 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:07:25,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 00:07:25,262 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:07:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:07:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash 181230569, now seen corresponding path program 146 times [2020-10-16 00:07:25,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:07:25,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843377236] [2020-10-16 00:07:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:07:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:07:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:25,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843377236] [2020-10-16 00:07:25,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32974076] [2020-10-16 00:07:25,640 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:07:25,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:07:25,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:07:25,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:07:25,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:07:25,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:07:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:25,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:07:25,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 00:07:25,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409475180] [2020-10-16 00:07:25,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:07:25,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:07:25,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:07:25,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:07:25,758 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:07:25,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 913 places, 626 transitions, 32042 flow. Second operand 27 states. [2020-10-16 00:07:25,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:07:25,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:07:25,759 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:07:28,547 INFO L129 PetriNetUnfolder]: 601/1674 cut-off events. [2020-10-16 00:07:28,548 INFO L130 PetriNetUnfolder]: For 670934/670940 co-relation queries the response was YES. [2020-10-16 00:07:28,603 INFO L80 FinitePrefix]: Finished finitePrefix Result has 48522 conditions, 1674 events. 601/1674 cut-off events. For 670934/670940 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 11282 event pairs, 0 based on Foata normal form. 8/1682 useless extension candidates. Maximal degree in co-relation 48105. Up to 1057 conditions per place. [2020-10-16 00:07:28,627 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 180 selfloop transitions, 476 changer transitions 0/663 dead transitions. [2020-10-16 00:07:28,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 951 places, 663 transitions, 37566 flow [2020-10-16 00:07:28,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 00:07:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 00:07:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2629 transitions. [2020-10-16 00:07:28,629 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741025641025641 [2020-10-16 00:07:28,630 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2629 transitions. [2020-10-16 00:07:28,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2629 transitions. [2020-10-16 00:07:28,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:07:28,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2629 transitions. [2020-10-16 00:07:28,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-16 00:07:28,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-16 00:07:28,634 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-16 00:07:28,634 INFO L185 Difference]: Start difference. First operand has 913 places, 626 transitions, 32042 flow. Second operand 39 states and 2629 transitions. [2020-10-16 00:07:28,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 951 places, 663 transitions, 37566 flow [2020-10-16 00:07:32,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 916 places, 663 transitions, 36476 flow, removed 131 selfloop flow, removed 35 redundant places. [2020-10-16 00:07:32,807 INFO L241 Difference]: Finished difference. Result has 918 places, 628 transitions, 32298 flow [2020-10-16 00:07:32,808 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=31026, PETRI_DIFFERENCE_MINUEND_PLACES=878, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=32298, PETRI_PLACES=918, PETRI_TRANSITIONS=628} [2020-10-16 00:07:32,808 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 900 predicate places. [2020-10-16 00:07:32,808 INFO L481 AbstractCegarLoop]: Abstraction has has 918 places, 628 transitions, 32298 flow [2020-10-16 00:07:32,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:07:32,808 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:07:32,808 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:07:33,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 00:07:33,009 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:07:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:07:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1837001699, now seen corresponding path program 147 times [2020-10-16 00:07:33,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:07:33,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598541167] [2020-10-16 00:07:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:07:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:07:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:33,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598541167] [2020-10-16 00:07:33,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854255458] [2020-10-16 00:07:33,375 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:07:33,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 00:07:33,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:07:33,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:07:33,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:07:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:33,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:07:33,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 00:07:33,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766814122] [2020-10-16 00:07:33,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:07:33,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:07:33,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:07:33,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:07:33,466 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:07:33,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 918 places, 628 transitions, 32298 flow. Second operand 26 states. [2020-10-16 00:07:33,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:07:33,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:07:33,466 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:07:36,162 INFO L129 PetriNetUnfolder]: 609/1698 cut-off events. [2020-10-16 00:07:36,162 INFO L130 PetriNetUnfolder]: For 679680/679682 co-relation queries the response was YES. [2020-10-16 00:07:36,219 INFO L80 FinitePrefix]: Finished finitePrefix Result has 49269 conditions, 1698 events. 609/1698 cut-off events. For 679680/679682 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11483 event pairs, 0 based on Foata normal form. 2/1700 useless extension candidates. Maximal degree in co-relation 48850. Up to 1073 conditions per place. [2020-10-16 00:07:36,243 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 158 selfloop transitions, 508 changer transitions 0/673 dead transitions. [2020-10-16 00:07:36,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 957 places, 673 transitions, 38344 flow [2020-10-16 00:07:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 00:07:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 00:07:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2697 transitions. [2020-10-16 00:07:36,245 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67425 [2020-10-16 00:07:36,246 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2697 transitions. [2020-10-16 00:07:36,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2697 transitions. [2020-10-16 00:07:36,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:07:36,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2697 transitions. [2020-10-16 00:07:36,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 00:07:36,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 00:07:36,249 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 00:07:36,249 INFO L185 Difference]: Start difference. First operand has 918 places, 628 transitions, 32298 flow. Second operand 40 states and 2697 transitions. [2020-10-16 00:07:36,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 957 places, 673 transitions, 38344 flow [2020-10-16 00:07:40,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 922 places, 673 transitions, 37262 flow, removed 131 selfloop flow, removed 35 redundant places. [2020-10-16 00:07:41,017 INFO L241 Difference]: Finished difference. Result has 926 places, 636 transitions, 33020 flow [2020-10-16 00:07:41,018 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=31294, PETRI_DIFFERENCE_MINUEND_PLACES=883, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=500, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=33020, PETRI_PLACES=926, PETRI_TRANSITIONS=636} [2020-10-16 00:07:41,018 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 908 predicate places. [2020-10-16 00:07:41,018 INFO L481 AbstractCegarLoop]: Abstraction has has 926 places, 636 transitions, 33020 flow [2020-10-16 00:07:41,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:07:41,018 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:07:41,018 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:07:41,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 00:07:41,219 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:07:41,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:07:41,220 INFO L82 PathProgramCache]: Analyzing trace with hash -179038773, now seen corresponding path program 148 times [2020-10-16 00:07:41,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:07:41,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052816698] [2020-10-16 00:07:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:07:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:07:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:41,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052816698] [2020-10-16 00:07:41,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067661504] [2020-10-16 00:07:41,599 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:07:41,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:07:41,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:07:41,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:07:41,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:07:41,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:07:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:41,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:07:41,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 00:07:41,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245046121] [2020-10-16 00:07:41,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:07:41,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:07:41,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:07:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:07:41,704 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:07:41,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 926 places, 636 transitions, 33020 flow. Second operand 27 states. [2020-10-16 00:07:41,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:07:41,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:07:41,705 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:07:44,787 INFO L129 PetriNetUnfolder]: 611/1704 cut-off events. [2020-10-16 00:07:44,787 INFO L130 PetriNetUnfolder]: For 682978/682984 co-relation queries the response was YES. [2020-10-16 00:07:44,845 INFO L80 FinitePrefix]: Finished finitePrefix Result has 49617 conditions, 1704 events. 611/1704 cut-off events. For 682978/682984 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11538 event pairs, 0 based on Foata normal form. 8/1712 useless extension candidates. Maximal degree in co-relation 49194. Up to 1077 conditions per place. [2020-10-16 00:07:44,869 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 142 selfloop transitions, 526 changer transitions 0/675 dead transitions. [2020-10-16 00:07:44,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 966 places, 675 transitions, 38796 flow [2020-10-16 00:07:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 00:07:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 00:07:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2765 transitions. [2020-10-16 00:07:44,872 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743902439024391 [2020-10-16 00:07:44,872 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2765 transitions. [2020-10-16 00:07:44,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2765 transitions. [2020-10-16 00:07:44,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:07:44,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2765 transitions. [2020-10-16 00:07:44,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-16 00:07:44,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-16 00:07:44,876 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-16 00:07:44,876 INFO L185 Difference]: Start difference. First operand has 926 places, 636 transitions, 33020 flow. Second operand 41 states and 2765 transitions. [2020-10-16 00:07:44,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 966 places, 675 transitions, 38796 flow [2020-10-16 00:07:49,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 938 places, 675 transitions, 37963 flow, removed 138 selfloop flow, removed 28 redundant places. [2020-10-16 00:07:49,034 INFO L241 Difference]: Finished difference. Result has 940 places, 638 transitions, 33653 flow [2020-10-16 00:07:49,035 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=32265, PETRI_DIFFERENCE_MINUEND_PLACES=898, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=33653, PETRI_PLACES=940, PETRI_TRANSITIONS=638} [2020-10-16 00:07:49,035 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 922 predicate places. [2020-10-16 00:07:49,035 INFO L481 AbstractCegarLoop]: Abstraction has has 940 places, 638 transitions, 33653 flow [2020-10-16 00:07:49,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:07:49,035 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:07:49,035 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:07:49,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:07:49,236 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:07:49,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:07:49,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1036080511, now seen corresponding path program 149 times [2020-10-16 00:07:49,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:07:49,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046173744] [2020-10-16 00:07:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:07:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:07:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:49,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046173744] [2020-10-16 00:07:49,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156371817] [2020-10-16 00:07:49,587 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:07:49,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 00:07:49,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:07:49,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:07:49,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:07:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:49,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:07:49,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 00:07:49,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645554772] [2020-10-16 00:07:49,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:07:49,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:07:49,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:07:49,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:07:49,669 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:07:49,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 940 places, 638 transitions, 33653 flow. Second operand 26 states. [2020-10-16 00:07:49,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:07:49,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:07:49,670 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:07:52,527 INFO L129 PetriNetUnfolder]: 621/1734 cut-off events. [2020-10-16 00:07:52,527 INFO L130 PetriNetUnfolder]: For 694033/694035 co-relation queries the response was YES. [2020-10-16 00:07:52,586 INFO L80 FinitePrefix]: Finished finitePrefix Result has 50697 conditions, 1734 events. 621/1734 cut-off events. For 694033/694035 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 11669 event pairs, 0 based on Foata normal form. 2/1736 useless extension candidates. Maximal degree in co-relation 50272. Up to 1097 conditions per place. [2020-10-16 00:07:52,798 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 127 selfloop transitions, 554 changer transitions 0/688 dead transitions. [2020-10-16 00:07:52,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 981 places, 688 transitions, 40008 flow [2020-10-16 00:07:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 00:07:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 00:07:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2833 transitions. [2020-10-16 00:07:52,801 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745238095238095 [2020-10-16 00:07:52,801 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2833 transitions. [2020-10-16 00:07:52,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2833 transitions. [2020-10-16 00:07:52,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:07:52,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2833 transitions. [2020-10-16 00:07:52,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-16 00:07:52,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-16 00:07:52,804 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-16 00:07:52,804 INFO L185 Difference]: Start difference. First operand has 940 places, 638 transitions, 33653 flow. Second operand 42 states and 2833 transitions. [2020-10-16 00:07:52,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 981 places, 688 transitions, 40008 flow [2020-10-16 00:07:56,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 945 places, 688 transitions, 38944 flow, removed 133 selfloop flow, removed 36 redundant places. [2020-10-16 00:07:56,922 INFO L241 Difference]: Finished difference. Result has 952 places, 649 transitions, 34698 flow [2020-10-16 00:07:56,922 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=32671, PETRI_DIFFERENCE_MINUEND_PLACES=904, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=34698, PETRI_PLACES=952, PETRI_TRANSITIONS=649} [2020-10-16 00:07:56,922 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 934 predicate places. [2020-10-16 00:07:56,922 INFO L481 AbstractCegarLoop]: Abstraction has has 952 places, 649 transitions, 34698 flow [2020-10-16 00:07:56,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:07:56,922 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:07:56,923 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:07:57,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-16 00:07:57,123 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:07:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:07:57,124 INFO L82 PathProgramCache]: Analyzing trace with hash -682759253, now seen corresponding path program 150 times [2020-10-16 00:07:57,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:07:57,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996451195] [2020-10-16 00:07:57,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:07:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:07:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:57,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996451195] [2020-10-16 00:07:57,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896198797] [2020-10-16 00:07:57,477 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:07:57,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 00:07:57,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:07:57,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:07:57,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:07:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:07:57,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:07:57,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 00:07:57,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322376076] [2020-10-16 00:07:57,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:07:57,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:07:57,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:07:57,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:07:57,565 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:07:57,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 952 places, 649 transitions, 34698 flow. Second operand 26 states. [2020-10-16 00:07:57,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:07:57,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:07:57,565 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:08:00,513 INFO L129 PetriNetUnfolder]: 623/1740 cut-off events. [2020-10-16 00:08:00,513 INFO L130 PetriNetUnfolder]: For 698638/698640 co-relation queries the response was YES. [2020-10-16 00:08:00,573 INFO L80 FinitePrefix]: Finished finitePrefix Result has 51185 conditions, 1740 events. 623/1740 cut-off events. For 698638/698640 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 11871 event pairs, 0 based on Foata normal form. 2/1742 useless extension candidates. Maximal degree in co-relation 50753. Up to 1101 conditions per place. [2020-10-16 00:08:00,598 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 103 selfloop transitions, 582 changer transitions 0/692 dead transitions. [2020-10-16 00:08:00,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 692 transitions, 40964 flow [2020-10-16 00:08:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 00:08:00,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 00:08:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2969 transitions. [2020-10-16 00:08:00,601 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6747727272727273 [2020-10-16 00:08:00,602 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2969 transitions. [2020-10-16 00:08:00,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2969 transitions. [2020-10-16 00:08:00,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:08:00,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2969 transitions. [2020-10-16 00:08:00,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-16 00:08:00,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-16 00:08:00,607 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-16 00:08:00,607 INFO L185 Difference]: Start difference. First operand has 952 places, 649 transitions, 34698 flow. Second operand 44 states and 2969 transitions. [2020-10-16 00:08:00,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 692 transitions, 40964 flow [2020-10-16 00:08:05,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 958 places, 692 transitions, 39815 flow, removed 138 selfloop flow, removed 37 redundant places. [2020-10-16 00:08:05,338 INFO L241 Difference]: Finished difference. Result has 960 places, 651 transitions, 35151 flow [2020-10-16 00:08:05,338 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=33635, PETRI_DIFFERENCE_MINUEND_PLACES=915, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=580, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=35151, PETRI_PLACES=960, PETRI_TRANSITIONS=651} [2020-10-16 00:08:05,338 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 942 predicate places. [2020-10-16 00:08:05,339 INFO L481 AbstractCegarLoop]: Abstraction has has 960 places, 651 transitions, 35151 flow [2020-10-16 00:08:05,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:08:05,339 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:08:05,339 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:08:05,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:08:05,553 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:08:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:08:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1892080399, now seen corresponding path program 151 times [2020-10-16 00:08:05,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:08:05,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477302830] [2020-10-16 00:08:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:08:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:08:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:05,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477302830] [2020-10-16 00:08:05,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134752990] [2020-10-16 00:08:05,921 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:08:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:08:05,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:08:05,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:08:06,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:08:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:06,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:08:06,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 00:08:06,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440821087] [2020-10-16 00:08:06,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:08:06,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:08:06,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:08:06,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:08:06,028 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:08:06,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 960 places, 651 transitions, 35151 flow. Second operand 27 states. [2020-10-16 00:08:06,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:08:06,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:08:06,029 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:08:09,355 INFO L129 PetriNetUnfolder]: 627/1752 cut-off events. [2020-10-16 00:08:09,356 INFO L130 PetriNetUnfolder]: For 703329/703335 co-relation queries the response was YES. [2020-10-16 00:08:09,415 INFO L80 FinitePrefix]: Finished finitePrefix Result has 51681 conditions, 1752 events. 627/1752 cut-off events. For 703329/703335 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11973 event pairs, 0 based on Foata normal form. 8/1760 useless extension candidates. Maximal degree in co-relation 51248. Up to 1109 conditions per place. [2020-10-16 00:08:09,441 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 97 selfloop transitions, 592 changer transitions 0/696 dead transitions. [2020-10-16 00:08:09,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1004 places, 696 transitions, 41483 flow [2020-10-16 00:08:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-16 00:08:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 00:08:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3037 transitions. [2020-10-16 00:08:09,444 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748888888888889 [2020-10-16 00:08:09,444 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3037 transitions. [2020-10-16 00:08:09,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3037 transitions. [2020-10-16 00:08:09,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:08:09,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3037 transitions. [2020-10-16 00:08:09,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 46 states. [2020-10-16 00:08:09,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 46 states. [2020-10-16 00:08:09,448 INFO L81 ComplementDD]: Finished complementDD. Result 46 states. [2020-10-16 00:08:09,448 INFO L185 Difference]: Start difference. First operand has 960 places, 651 transitions, 35151 flow. Second operand 45 states and 3037 transitions. [2020-10-16 00:08:09,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1004 places, 696 transitions, 41483 flow [2020-10-16 00:08:13,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 965 places, 696 transitions, 40236 flow, removed 135 selfloop flow, removed 39 redundant places. [2020-10-16 00:08:13,998 INFO L241 Difference]: Finished difference. Result has 969 places, 655 transitions, 35725 flow [2020-10-16 00:08:13,998 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=33990, PETRI_DIFFERENCE_MINUEND_PLACES=921, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=35725, PETRI_PLACES=969, PETRI_TRANSITIONS=655} [2020-10-16 00:08:13,998 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 951 predicate places. [2020-10-16 00:08:13,999 INFO L481 AbstractCegarLoop]: Abstraction has has 969 places, 655 transitions, 35725 flow [2020-10-16 00:08:13,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:08:13,999 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:08:13,999 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:08:14,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:08:14,200 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:08:14,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:08:14,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1962002883, now seen corresponding path program 152 times [2020-10-16 00:08:14,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:08:14,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428455322] [2020-10-16 00:08:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:08:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:08:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:14,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428455322] [2020-10-16 00:08:14,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729602582] [2020-10-16 00:08:14,543 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:08:14,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:08:14,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:08:14,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:08:14,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:08:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:14,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:08:14,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 00:08:14,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098391998] [2020-10-16 00:08:14,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:08:14,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:08:14,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:08:14,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:08:14,625 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:08:14,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 655 transitions, 35725 flow. Second operand 26 states. [2020-10-16 00:08:14,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:08:14,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:08:14,626 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:08:17,744 INFO L129 PetriNetUnfolder]: 631/1763 cut-off events. [2020-10-16 00:08:17,744 INFO L130 PetriNetUnfolder]: For 708997/709003 co-relation queries the response was YES. [2020-10-16 00:08:17,806 INFO L80 FinitePrefix]: Finished finitePrefix Result has 52212 conditions, 1763 events. 631/1763 cut-off events. For 708997/709003 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 12068 event pairs, 0 based on Foata normal form. 5/1768 useless extension candidates. Maximal degree in co-relation 51775. Up to 1117 conditions per place. [2020-10-16 00:08:17,832 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 84 selfloop transitions, 612 changer transitions 0/703 dead transitions. [2020-10-16 00:08:17,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1014 places, 703 transitions, 42423 flow [2020-10-16 00:08:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-16 00:08:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 00:08:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3105 transitions. [2020-10-16 00:08:17,835 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:08:17,835 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3105 transitions. [2020-10-16 00:08:17,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3105 transitions. [2020-10-16 00:08:17,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:08:17,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3105 transitions. [2020-10-16 00:08:17,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-16 00:08:17,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-16 00:08:17,839 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-16 00:08:17,839 INFO L185 Difference]: Start difference. First operand has 969 places, 655 transitions, 35725 flow. Second operand 46 states and 3105 transitions. [2020-10-16 00:08:17,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1014 places, 703 transitions, 42423 flow [2020-10-16 00:08:22,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 972 places, 703 transitions, 41154 flow, removed 142 selfloop flow, removed 42 redundant places. [2020-10-16 00:08:22,675 INFO L241 Difference]: Finished difference. Result has 976 places, 660 transitions, 36398 flow [2020-10-16 00:08:22,675 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=34552, PETRI_DIFFERENCE_MINUEND_PLACES=927, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=607, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=36398, PETRI_PLACES=976, PETRI_TRANSITIONS=660} [2020-10-16 00:08:22,675 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 958 predicate places. [2020-10-16 00:08:22,675 INFO L481 AbstractCegarLoop]: Abstraction has has 976 places, 660 transitions, 36398 flow [2020-10-16 00:08:22,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:08:22,675 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:08:22,676 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:08:22,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-16 00:08:22,882 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:08:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:08:22,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1978090023, now seen corresponding path program 153 times [2020-10-16 00:08:22,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:08:22,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534113684] [2020-10-16 00:08:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:08:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:08:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:23,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534113684] [2020-10-16 00:08:23,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934368950] [2020-10-16 00:08:23,250 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:08:23,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 00:08:23,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:08:23,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:08:23,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:08:23,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:08:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:23,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:08:23,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 00:08:23,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448504621] [2020-10-16 00:08:23,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:08:23,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:08:23,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:08:23,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:08:23,360 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:08:23,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 976 places, 660 transitions, 36398 flow. Second operand 27 states. [2020-10-16 00:08:23,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:08:23,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:08:23,360 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:08:26,729 INFO L129 PetriNetUnfolder]: 633/1769 cut-off events. [2020-10-16 00:08:26,729 INFO L130 PetriNetUnfolder]: For 725835/725837 co-relation queries the response was YES. [2020-10-16 00:08:26,792 INFO L80 FinitePrefix]: Finished finitePrefix Result has 52846 conditions, 1769 events. 633/1769 cut-off events. For 725835/725837 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 12093 event pairs, 0 based on Foata normal form. 4/1773 useless extension candidates. Maximal degree in co-relation 52405. Up to 1121 conditions per place. [2020-10-16 00:08:26,818 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 80 selfloop transitions, 618 changer transitions 0/705 dead transitions. [2020-10-16 00:08:26,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1022 places, 705 transitions, 42962 flow [2020-10-16 00:08:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 00:08:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 00:08:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3173 transitions. [2020-10-16 00:08:26,820 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751063829787234 [2020-10-16 00:08:26,820 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3173 transitions. [2020-10-16 00:08:26,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3173 transitions. [2020-10-16 00:08:26,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:08:26,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3173 transitions. [2020-10-16 00:08:26,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-16 00:08:26,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-16 00:08:26,824 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-16 00:08:26,824 INFO L185 Difference]: Start difference. First operand has 976 places, 660 transitions, 36398 flow. Second operand 47 states and 3173 transitions. [2020-10-16 00:08:26,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1022 places, 705 transitions, 42962 flow [2020-10-16 00:08:31,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 977 places, 705 transitions, 41512 flow, removed 182 selfloop flow, removed 45 redundant places. [2020-10-16 00:08:31,859 INFO L241 Difference]: Finished difference. Result has 979 places, 662 transitions, 36610 flow [2020-10-16 00:08:31,860 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=34994, PETRI_DIFFERENCE_MINUEND_PLACES=931, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=616, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=36610, PETRI_PLACES=979, PETRI_TRANSITIONS=662} [2020-10-16 00:08:31,860 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 961 predicate places. [2020-10-16 00:08:31,860 INFO L481 AbstractCegarLoop]: Abstraction has has 979 places, 662 transitions, 36610 flow [2020-10-16 00:08:31,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:08:31,860 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:08:31,860 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:08:32,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:08:32,070 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:08:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:08:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1915313937, now seen corresponding path program 154 times [2020-10-16 00:08:32,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:08:32,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27954552] [2020-10-16 00:08:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:08:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:08:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:32,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27954552] [2020-10-16 00:08:32,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777144953] [2020-10-16 00:08:32,427 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:08:32,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:08:32,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:08:32,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:08:32,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:08:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:32,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:08:32,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 00:08:32,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028910295] [2020-10-16 00:08:32,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 00:08:32,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:08:32,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 00:08:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-16 00:08:32,510 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:08:32,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 979 places, 662 transitions, 36610 flow. Second operand 26 states. [2020-10-16 00:08:32,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:08:32,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:08:32,510 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:08:35,808 INFO L129 PetriNetUnfolder]: 642/1789 cut-off events. [2020-10-16 00:08:35,809 INFO L130 PetriNetUnfolder]: For 751248/751254 co-relation queries the response was YES. [2020-10-16 00:08:35,872 INFO L80 FinitePrefix]: Finished finitePrefix Result has 54034 conditions, 1789 events. 642/1789 cut-off events. For 751248/751254 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 12219 event pairs, 0 based on Foata normal form. 5/1794 useless extension candidates. Maximal degree in co-relation 53592. Up to 1133 conditions per place. [2020-10-16 00:08:35,899 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 73 selfloop transitions, 634 changer transitions 0/714 dead transitions. [2020-10-16 00:08:35,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1026 places, 714 transitions, 44012 flow [2020-10-16 00:08:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-16 00:08:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 00:08:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3242 transitions. [2020-10-16 00:08:35,902 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754166666666667 [2020-10-16 00:08:35,902 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3242 transitions. [2020-10-16 00:08:35,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3242 transitions. [2020-10-16 00:08:35,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:08:35,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3242 transitions. [2020-10-16 00:08:35,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-16 00:08:35,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-16 00:08:35,906 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-16 00:08:35,906 INFO L185 Difference]: Start difference. First operand has 979 places, 662 transitions, 36610 flow. Second operand 48 states and 3242 transitions. [2020-10-16 00:08:35,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1026 places, 714 transitions, 44012 flow [2020-10-16 00:08:40,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 983 places, 714 transitions, 42580 flow, removed 173 selfloop flow, removed 43 redundant places. [2020-10-16 00:08:40,870 INFO L241 Difference]: Finished difference. Result has 987 places, 668 transitions, 37424 flow [2020-10-16 00:08:40,871 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=35332, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=37424, PETRI_PLACES=987, PETRI_TRANSITIONS=668} [2020-10-16 00:08:40,871 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 969 predicate places. [2020-10-16 00:08:40,871 INFO L481 AbstractCegarLoop]: Abstraction has has 987 places, 668 transitions, 37424 flow [2020-10-16 00:08:40,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 00:08:40,871 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:08:40,871 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:08:41,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 00:08:41,072 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:08:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:08:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1915297197, now seen corresponding path program 155 times [2020-10-16 00:08:41,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:08:41,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458977566] [2020-10-16 00:08:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:08:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:08:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:41,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458977566] [2020-10-16 00:08:41,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552446186] [2020-10-16 00:08:41,429 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:08:41,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 00:08:41,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:08:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:08:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:08:41,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:08:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:41,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:08:41,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 00:08:41,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122055533] [2020-10-16 00:08:41,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:08:41,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:08:41,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:08:41,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:08:41,545 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:08:41,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 987 places, 668 transitions, 37424 flow. Second operand 27 states. [2020-10-16 00:08:41,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:08:41,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:08:41,547 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:08:45,203 INFO L129 PetriNetUnfolder]: 639/1783 cut-off events. [2020-10-16 00:08:45,204 INFO L130 PetriNetUnfolder]: For 774622/774624 co-relation queries the response was YES. [2020-10-16 00:08:45,268 INFO L80 FinitePrefix]: Finished finitePrefix Result has 54431 conditions, 1783 events. 639/1783 cut-off events. For 774622/774624 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 12228 event pairs, 0 based on Foata normal form. 4/1787 useless extension candidates. Maximal degree in co-relation 53985. Up to 1129 conditions per place. [2020-10-16 00:08:45,294 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 71 selfloop transitions, 636 changer transitions 0/714 dead transitions. [2020-10-16 00:08:45,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1035 places, 714 transitions, 44266 flow [2020-10-16 00:08:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-16 00:08:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 00:08:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3309 transitions. [2020-10-16 00:08:45,297 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753061224489796 [2020-10-16 00:08:45,297 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3309 transitions. [2020-10-16 00:08:45,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3309 transitions. [2020-10-16 00:08:45,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:08:45,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3309 transitions. [2020-10-16 00:08:45,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 50 states. [2020-10-16 00:08:45,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 50 states. [2020-10-16 00:08:45,301 INFO L81 ComplementDD]: Finished complementDD. Result 50 states. [2020-10-16 00:08:45,301 INFO L185 Difference]: Start difference. First operand has 987 places, 668 transitions, 37424 flow. Second operand 49 states and 3309 transitions. [2020-10-16 00:08:45,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1035 places, 714 transitions, 44266 flow [2020-10-16 00:08:51,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 992 places, 714 transitions, 42638 flow, removed 263 selfloop flow, removed 43 redundant places. [2020-10-16 00:08:51,161 INFO L241 Difference]: Finished difference. Result has 994 places, 669 transitions, 37358 flow [2020-10-16 00:08:51,162 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=35796, PETRI_DIFFERENCE_MINUEND_PLACES=944, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=635, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=37358, PETRI_PLACES=994, PETRI_TRANSITIONS=669} [2020-10-16 00:08:51,162 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 976 predicate places. [2020-10-16 00:08:51,162 INFO L481 AbstractCegarLoop]: Abstraction has has 994 places, 669 transitions, 37358 flow [2020-10-16 00:08:51,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:08:51,162 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:08:51,162 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:08:51,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 00:08:51,363 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:08:51,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:08:51,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1712641855, now seen corresponding path program 156 times [2020-10-16 00:08:51,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:08:51,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579266308] [2020-10-16 00:08:51,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:08:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:08:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:51,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579266308] [2020-10-16 00:08:51,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452851194] [2020-10-16 00:08:51,697 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:08:51,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 00:08:51,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:08:51,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 00:08:51,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:08:51,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:08:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:08:51,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:08:51,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 00:08:51,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434365647] [2020-10-16 00:08:51,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:08:51,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:08:51,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:08:51,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:08:51,844 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:08:51,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 994 places, 669 transitions, 37358 flow. Second operand 27 states. [2020-10-16 00:08:51,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:08:51,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:08:51,845 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:08:55,306 INFO L129 PetriNetUnfolder]: 642/1789 cut-off events. [2020-10-16 00:08:55,306 INFO L130 PetriNetUnfolder]: For 791941/791943 co-relation queries the response was YES. [2020-10-16 00:08:55,371 INFO L80 FinitePrefix]: Finished finitePrefix Result has 54887 conditions, 1789 events. 642/1789 cut-off events. For 791941/791943 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 12273 event pairs, 0 based on Foata normal form. 3/1792 useless extension candidates. Maximal degree in co-relation 54439. Up to 1131 conditions per place. [2020-10-16 00:08:55,398 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 149 selfloop transitions, 560 changer transitions 0/716 dead transitions. [2020-10-16 00:08:55,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1041 places, 716 transitions, 44350 flow [2020-10-16 00:08:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-16 00:08:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 00:08:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3241 transitions. [2020-10-16 00:08:55,401 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752083333333333 [2020-10-16 00:08:55,401 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3241 transitions. [2020-10-16 00:08:55,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3241 transitions. [2020-10-16 00:08:55,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:08:55,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3241 transitions. [2020-10-16 00:08:55,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-16 00:08:55,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-16 00:08:55,406 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-16 00:08:55,406 INFO L185 Difference]: Start difference. First operand has 994 places, 669 transitions, 37358 flow. Second operand 48 states and 3241 transitions. [2020-10-16 00:08:55,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1041 places, 716 transitions, 44350 flow [2020-10-16 00:09:01,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 995 places, 716 transitions, 42914 flow, removed 125 selfloop flow, removed 46 redundant places. [2020-10-16 00:09:01,389 INFO L241 Difference]: Finished difference. Result has 997 places, 672 transitions, 37604 flow [2020-10-16 00:09:01,390 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=36062, PETRI_DIFFERENCE_MINUEND_PLACES=948, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=37604, PETRI_PLACES=997, PETRI_TRANSITIONS=672} [2020-10-16 00:09:01,390 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 979 predicate places. [2020-10-16 00:09:01,390 INFO L481 AbstractCegarLoop]: Abstraction has has 997 places, 672 transitions, 37604 flow [2020-10-16 00:09:01,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:09:01,390 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:09:01,391 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:09:01,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 00:09:01,591 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:09:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:09:01,592 INFO L82 PathProgramCache]: Analyzing trace with hash 755345344, now seen corresponding path program 157 times [2020-10-16 00:09:01,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:09:01,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189929510] [2020-10-16 00:09:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:09:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:09:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:01,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189929510] [2020-10-16 00:09:01,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723389370] [2020-10-16 00:09:01,965 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:09:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:09:02,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:09:02,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:09:02,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:09:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:02,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:09:02,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 00:09:02,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509233863] [2020-10-16 00:09:02,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:09:02,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:09:02,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:09:02,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:09:02,082 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:09:02,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 997 places, 672 transitions, 37604 flow. Second operand 28 states. [2020-10-16 00:09:02,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:09:02,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:09:02,082 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:09:05,785 INFO L129 PetriNetUnfolder]: 645/1796 cut-off events. [2020-10-16 00:09:05,785 INFO L130 PetriNetUnfolder]: For 780444/780446 co-relation queries the response was YES. [2020-10-16 00:09:05,850 INFO L80 FinitePrefix]: Finished finitePrefix Result has 54822 conditions, 1796 events. 645/1796 cut-off events. For 780444/780446 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 12340 event pairs, 0 based on Foata normal form. 1/1797 useless extension candidates. Maximal degree in co-relation 54372. Up to 1135 conditions per place. [2020-10-16 00:09:05,877 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 74 selfloop transitions, 640 changer transitions 0/721 dead transitions. [2020-10-16 00:09:05,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1044 places, 721 transitions, 44784 flow [2020-10-16 00:09:05,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-16 00:09:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 00:09:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3241 transitions. [2020-10-16 00:09:05,879 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752083333333333 [2020-10-16 00:09:05,880 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3241 transitions. [2020-10-16 00:09:05,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3241 transitions. [2020-10-16 00:09:05,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:09:05,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3241 transitions. [2020-10-16 00:09:05,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-16 00:09:05,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-16 00:09:05,883 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-16 00:09:05,883 INFO L185 Difference]: Start difference. First operand has 997 places, 672 transitions, 37604 flow. Second operand 48 states and 3241 transitions. [2020-10-16 00:09:05,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1044 places, 721 transitions, 44784 flow [2020-10-16 00:09:11,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 999 places, 721 transitions, 43514 flow, removed 117 selfloop flow, removed 45 redundant places. [2020-10-16 00:09:11,923 INFO L241 Difference]: Finished difference. Result has 1001 places, 675 transitions, 38052 flow [2020-10-16 00:09:11,923 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=36334, PETRI_DIFFERENCE_MINUEND_PLACES=952, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=637, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=38052, PETRI_PLACES=1001, PETRI_TRANSITIONS=675} [2020-10-16 00:09:11,924 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 983 predicate places. [2020-10-16 00:09:11,924 INFO L481 AbstractCegarLoop]: Abstraction has has 1001 places, 675 transitions, 38052 flow [2020-10-16 00:09:11,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:09:11,924 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:09:11,924 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:09:12,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 00:09:12,125 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:09:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:09:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash -631771379, now seen corresponding path program 158 times [2020-10-16 00:09:12,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:09:12,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500216339] [2020-10-16 00:09:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:09:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:09:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:12,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500216339] [2020-10-16 00:09:12,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227637400] [2020-10-16 00:09:12,638 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:09:12,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:09:12,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:09:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:09:12,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:09:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:12,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:09:12,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 00:09:12,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103361811] [2020-10-16 00:09:12,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:09:12,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:09:12,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:09:12,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:09:12,700 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:09:12,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1001 places, 675 transitions, 38052 flow. Second operand 27 states. [2020-10-16 00:09:12,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:09:12,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:09:12,700 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:09:15,199 INFO L129 PetriNetUnfolder]: 647/1802 cut-off events. [2020-10-16 00:09:15,200 INFO L130 PetriNetUnfolder]: For 813510/813512 co-relation queries the response was YES. [2020-10-16 00:09:15,265 INFO L80 FinitePrefix]: Finished finitePrefix Result has 55650 conditions, 1802 events. 647/1802 cut-off events. For 813510/813512 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 12360 event pairs, 0 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 55198. Up to 1188 conditions per place. [2020-10-16 00:09:15,293 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 660 selfloop transitions, 35 changer transitions 0/702 dead transitions. [2020-10-16 00:09:15,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1028 places, 702 transitions, 42692 flow [2020-10-16 00:09:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 00:09:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 00:09:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1880 transitions. [2020-10-16 00:09:15,295 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6714285714285714 [2020-10-16 00:09:15,295 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1880 transitions. [2020-10-16 00:09:15,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1880 transitions. [2020-10-16 00:09:15,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:09:15,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1880 transitions. [2020-10-16 00:09:15,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-16 00:09:15,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-16 00:09:15,297 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-16 00:09:15,297 INFO L185 Difference]: Start difference. First operand has 1001 places, 675 transitions, 38052 flow. Second operand 28 states and 1880 transitions. [2020-10-16 00:09:15,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1028 places, 702 transitions, 42692 flow [2020-10-16 00:09:21,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 983 places, 702 transitions, 41258 flow, removed 122 selfloop flow, removed 45 redundant places. [2020-10-16 00:09:21,165 INFO L241 Difference]: Finished difference. Result has 985 places, 677 transitions, 36940 flow [2020-10-16 00:09:21,165 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=36618, PETRI_DIFFERENCE_MINUEND_PLACES=956, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=36940, PETRI_PLACES=985, PETRI_TRANSITIONS=677} [2020-10-16 00:09:21,166 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 967 predicate places. [2020-10-16 00:09:21,166 INFO L481 AbstractCegarLoop]: Abstraction has has 985 places, 677 transitions, 36940 flow [2020-10-16 00:09:21,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:09:21,166 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:09:21,166 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:09:21,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:09:21,367 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:09:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:09:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 159 times [2020-10-16 00:09:21,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:09:21,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791470706] [2020-10-16 00:09:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:09:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:09:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:21,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791470706] [2020-10-16 00:09:21,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894185727] [2020-10-16 00:09:21,867 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:09:21,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 00:09:21,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:09:21,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:09:21,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:09:21,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:09:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:21,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:09:21,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 00:09:21,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591209721] [2020-10-16 00:09:21,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:09:21,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:09:21,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:09:21,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:09:21,979 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:09:21,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 985 places, 677 transitions, 36940 flow. Second operand 28 states. [2020-10-16 00:09:21,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:09:21,980 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:09:21,980 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:09:24,812 INFO L129 PetriNetUnfolder]: 653/1820 cut-off events. [2020-10-16 00:09:24,812 INFO L130 PetriNetUnfolder]: For 849892/849894 co-relation queries the response was YES. [2020-10-16 00:09:24,870 INFO L80 FinitePrefix]: Finished finitePrefix Result has 56260 conditions, 1820 events. 653/1820 cut-off events. For 849892/849894 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 12510 event pairs, 0 based on Foata normal form. 4/1824 useless extension candidates. Maximal degree in co-relation 55806. Up to 1151 conditions per place. [2020-10-16 00:09:24,899 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 579 selfloop transitions, 124 changer transitions 0/710 dead transitions. [2020-10-16 00:09:24,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1015 places, 710 transitions, 42302 flow [2020-10-16 00:09:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 00:09:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 00:09:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2084 transitions. [2020-10-16 00:09:24,901 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.672258064516129 [2020-10-16 00:09:24,902 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2084 transitions. [2020-10-16 00:09:24,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2084 transitions. [2020-10-16 00:09:24,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:09:24,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2084 transitions. [2020-10-16 00:09:24,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 00:09:24,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 00:09:24,904 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 00:09:24,904 INFO L185 Difference]: Start difference. First operand has 985 places, 677 transitions, 36940 flow. Second operand 31 states and 2084 transitions. [2020-10-16 00:09:24,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1015 places, 710 transitions, 42302 flow [2020-10-16 00:09:30,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 990 places, 710 transitions, 42010 flow, removed 113 selfloop flow, removed 25 redundant places. [2020-10-16 00:09:30,781 INFO L241 Difference]: Finished difference. Result has 994 places, 683 transitions, 37626 flow [2020-10-16 00:09:30,781 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=36678, PETRI_DIFFERENCE_MINUEND_PLACES=960, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=37626, PETRI_PLACES=994, PETRI_TRANSITIONS=683} [2020-10-16 00:09:30,781 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 976 predicate places. [2020-10-16 00:09:30,781 INFO L481 AbstractCegarLoop]: Abstraction has has 994 places, 683 transitions, 37626 flow [2020-10-16 00:09:30,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:09:30,782 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:09:30,782 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:09:30,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:09:30,982 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:09:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:09:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash 857344259, now seen corresponding path program 160 times [2020-10-16 00:09:30,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:09:30,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242081430] [2020-10-16 00:09:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:09:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:09:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:31,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242081430] [2020-10-16 00:09:31,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975416630] [2020-10-16 00:09:31,417 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:09:31,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:09:31,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:09:31,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:09:31,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:09:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:31,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:09:31,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 00:09:31,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213646551] [2020-10-16 00:09:31,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:09:31,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:09:31,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:09:31,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:09:31,502 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:09:31,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 994 places, 683 transitions, 37626 flow. Second operand 27 states. [2020-10-16 00:09:31,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:09:31,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:09:31,503 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:09:34,453 INFO L129 PetriNetUnfolder]: 655/1826 cut-off events. [2020-10-16 00:09:34,454 INFO L130 PetriNetUnfolder]: For 867672/867678 co-relation queries the response was YES. [2020-10-16 00:09:34,521 INFO L80 FinitePrefix]: Finished finitePrefix Result has 56846 conditions, 1826 events. 655/1826 cut-off events. For 867672/867678 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 12531 event pairs, 0 based on Foata normal form. 8/1834 useless extension candidates. Maximal degree in co-relation 56388. Up to 1155 conditions per place. [2020-10-16 00:09:34,548 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 377 selfloop transitions, 334 changer transitions 0/718 dead transitions. [2020-10-16 00:09:34,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1031 places, 718 transitions, 43362 flow [2020-10-16 00:09:34,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 00:09:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 00:09:34,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2559 transitions. [2020-10-16 00:09:34,551 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734210526315789 [2020-10-16 00:09:34,551 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2559 transitions. [2020-10-16 00:09:34,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2559 transitions. [2020-10-16 00:09:34,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:09:34,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2559 transitions. [2020-10-16 00:09:34,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 39 states. [2020-10-16 00:09:34,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 39 states. [2020-10-16 00:09:34,554 INFO L81 ComplementDD]: Finished complementDD. Result 39 states. [2020-10-16 00:09:34,554 INFO L185 Difference]: Start difference. First operand has 994 places, 683 transitions, 37626 flow. Second operand 38 states and 2559 transitions. [2020-10-16 00:09:34,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1031 places, 718 transitions, 43362 flow [2020-10-16 00:09:40,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1004 places, 718 transitions, 42870 flow, removed 134 selfloop flow, removed 27 redundant places. [2020-10-16 00:09:40,604 INFO L241 Difference]: Finished difference. Result has 1006 places, 685 transitions, 38164 flow [2020-10-16 00:09:40,604 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=37204, PETRI_DIFFERENCE_MINUEND_PLACES=967, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=38164, PETRI_PLACES=1006, PETRI_TRANSITIONS=685} [2020-10-16 00:09:40,605 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 988 predicate places. [2020-10-16 00:09:40,605 INFO L481 AbstractCegarLoop]: Abstraction has has 1006 places, 685 transitions, 38164 flow [2020-10-16 00:09:40,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:09:40,605 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:09:40,605 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:09:40,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:09:40,806 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:09:40,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:09:40,806 INFO L82 PathProgramCache]: Analyzing trace with hash 99072229, now seen corresponding path program 161 times [2020-10-16 00:09:40,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:09:40,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271571316] [2020-10-16 00:09:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:09:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:09:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:41,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271571316] [2020-10-16 00:09:41,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405755994] [2020-10-16 00:09:41,247 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:09:41,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 00:09:41,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:09:41,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:09:41,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:09:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:41,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:09:41,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 00:09:41,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997155534] [2020-10-16 00:09:41,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:09:41,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:09:41,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:09:41,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:09:41,330 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:09:41,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1006 places, 685 transitions, 38164 flow. Second operand 27 states. [2020-10-16 00:09:41,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:09:41,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:09:41,330 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:09:44,165 INFO L129 PetriNetUnfolder]: 657/1832 cut-off events. [2020-10-16 00:09:44,165 INFO L130 PetriNetUnfolder]: For 869664/869670 co-relation queries the response was YES. [2020-10-16 00:09:44,233 INFO L80 FinitePrefix]: Finished finitePrefix Result has 57244 conditions, 1832 events. 657/1832 cut-off events. For 869664/869670 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 12549 event pairs, 0 based on Foata normal form. 8/1840 useless extension candidates. Maximal degree in co-relation 56784. Up to 1159 conditions per place. [2020-10-16 00:09:44,263 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 319 selfloop transitions, 396 changer transitions 0/722 dead transitions. [2020-10-16 00:09:44,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1045 places, 722 transitions, 44154 flow [2020-10-16 00:09:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 00:09:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 00:09:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2695 transitions. [2020-10-16 00:09:44,266 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67375 [2020-10-16 00:09:44,266 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2695 transitions. [2020-10-16 00:09:44,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2695 transitions. [2020-10-16 00:09:44,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:09:44,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2695 transitions. [2020-10-16 00:09:44,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 00:09:44,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 00:09:44,270 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 00:09:44,270 INFO L185 Difference]: Start difference. First operand has 1006 places, 685 transitions, 38164 flow. Second operand 40 states and 2695 transitions. [2020-10-16 00:09:44,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1045 places, 722 transitions, 44154 flow [2020-10-16 00:09:51,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1011 places, 722 transitions, 43270 flow, removed 144 selfloop flow, removed 34 redundant places. [2020-10-16 00:09:51,066 INFO L241 Difference]: Finished difference. Result has 1013 places, 687 transitions, 38447 flow [2020-10-16 00:09:51,067 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=37354, PETRI_DIFFERENCE_MINUEND_PLACES=972, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=38447, PETRI_PLACES=1013, PETRI_TRANSITIONS=687} [2020-10-16 00:09:51,067 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 995 predicate places. [2020-10-16 00:09:51,067 INFO L481 AbstractCegarLoop]: Abstraction has has 1013 places, 687 transitions, 38447 flow [2020-10-16 00:09:51,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:09:51,067 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:09:51,067 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:09:51,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:09:51,268 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:09:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:09:51,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1631323833, now seen corresponding path program 162 times [2020-10-16 00:09:51,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:09:51,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32976872] [2020-10-16 00:09:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:09:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:09:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:51,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32976872] [2020-10-16 00:09:51,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56189425] [2020-10-16 00:09:51,693 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:09:51,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 00:09:51,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:09:51,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:09:51,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:09:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:09:51,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:09:51,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 00:09:51,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68911296] [2020-10-16 00:09:51,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:09:51,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:09:51,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:09:51,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:09:51,787 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:09:51,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1013 places, 687 transitions, 38447 flow. Second operand 27 states. [2020-10-16 00:09:51,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:09:51,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:09:51,788 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:09:54,992 INFO L129 PetriNetUnfolder]: 663/1850 cut-off events. [2020-10-16 00:09:54,993 INFO L130 PetriNetUnfolder]: For 877475/877481 co-relation queries the response was YES. [2020-10-16 00:09:55,061 INFO L80 FinitePrefix]: Finished finitePrefix Result has 57921 conditions, 1850 events. 663/1850 cut-off events. For 877475/877481 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 12706 event pairs, 0 based on Foata normal form. 8/1858 useless extension candidates. Maximal degree in co-relation 57459. Up to 1171 conditions per place. [2020-10-16 00:09:55,090 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 267 selfloop transitions, 456 changer transitions 0/730 dead transitions. [2020-10-16 00:09:55,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1054 places, 730 transitions, 44993 flow [2020-10-16 00:09:55,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 00:09:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 00:09:55,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2831 transitions. [2020-10-16 00:09:55,092 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674047619047619 [2020-10-16 00:09:55,092 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2831 transitions. [2020-10-16 00:09:55,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2831 transitions. [2020-10-16 00:09:55,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:09:55,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2831 transitions. [2020-10-16 00:09:55,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-16 00:09:55,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-16 00:09:55,096 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-16 00:09:55,096 INFO L185 Difference]: Start difference. First operand has 1013 places, 687 transitions, 38447 flow. Second operand 42 states and 2831 transitions. [2020-10-16 00:09:55,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1054 places, 730 transitions, 44993 flow [2020-10-16 00:10:01,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1027 places, 730 transitions, 44349 flow, removed 138 selfloop flow, removed 27 redundant places. [2020-10-16 00:10:01,633 INFO L241 Difference]: Finished difference. Result has 1031 places, 693 transitions, 39497 flow [2020-10-16 00:10:01,634 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=37881, PETRI_DIFFERENCE_MINUEND_PLACES=986, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=39497, PETRI_PLACES=1031, PETRI_TRANSITIONS=693} [2020-10-16 00:10:01,634 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1013 predicate places. [2020-10-16 00:10:01,634 INFO L481 AbstractCegarLoop]: Abstraction has has 1031 places, 693 transitions, 39497 flow [2020-10-16 00:10:01,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:10:01,635 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:10:01,635 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:10:01,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:10:01,849 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:10:01,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:10:01,850 INFO L82 PathProgramCache]: Analyzing trace with hash -646132309, now seen corresponding path program 163 times [2020-10-16 00:10:01,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:10:01,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521394427] [2020-10-16 00:10:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:10:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:10:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:10:02,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521394427] [2020-10-16 00:10:02,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116257563] [2020-10-16 00:10:02,281 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:10:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:10:02,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:10:02,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:10:02,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:10:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:10:02,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:10:02,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 00:10:02,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69531535] [2020-10-16 00:10:02,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:10:02,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:10:02,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:10:02,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:10:02,393 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:10:02,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1031 places, 693 transitions, 39497 flow. Second operand 28 states. [2020-10-16 00:10:02,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:10:02,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:10:02,394 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:10:05,825 INFO L129 PetriNetUnfolder]: 665/1856 cut-off events. [2020-10-16 00:10:05,826 INFO L130 PetriNetUnfolder]: For 881037/881039 co-relation queries the response was YES. [2020-10-16 00:10:05,896 INFO L80 FinitePrefix]: Finished finitePrefix Result has 58432 conditions, 1856 events. 665/1856 cut-off events. For 881037/881039 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 12647 event pairs, 0 based on Foata normal form. 4/1860 useless extension candidates. Maximal degree in co-relation 57966. Up to 1175 conditions per place. [2020-10-16 00:10:05,924 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 249 selfloop transitions, 476 changer transitions 0/732 dead transitions. [2020-10-16 00:10:05,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1071 places, 732 transitions, 45753 flow [2020-10-16 00:10:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 00:10:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 00:10:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2764 transitions. [2020-10-16 00:10:05,927 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741463414634147 [2020-10-16 00:10:05,928 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2764 transitions. [2020-10-16 00:10:05,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2764 transitions. [2020-10-16 00:10:05,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:10:05,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2764 transitions. [2020-10-16 00:10:05,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-16 00:10:05,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-16 00:10:05,931 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-16 00:10:05,931 INFO L185 Difference]: Start difference. First operand has 1031 places, 693 transitions, 39497 flow. Second operand 41 states and 2764 transitions. [2020-10-16 00:10:05,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1071 places, 732 transitions, 45753 flow [2020-10-16 00:10:13,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1036 places, 732 transitions, 44802 flow, removed 140 selfloop flow, removed 35 redundant places. [2020-10-16 00:10:13,715 INFO L241 Difference]: Finished difference. Result has 1038 places, 695 transitions, 39898 flow [2020-10-16 00:10:13,715 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=38624, PETRI_DIFFERENCE_MINUEND_PLACES=996, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=39898, PETRI_PLACES=1038, PETRI_TRANSITIONS=695} [2020-10-16 00:10:13,716 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1020 predicate places. [2020-10-16 00:10:13,716 INFO L481 AbstractCegarLoop]: Abstraction has has 1038 places, 695 transitions, 39898 flow [2020-10-16 00:10:13,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:10:13,716 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:10:13,716 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:10:13,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:10:13,917 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:10:13,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:10:13,917 INFO L82 PathProgramCache]: Analyzing trace with hash 609790859, now seen corresponding path program 164 times [2020-10-16 00:10:13,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:10:13,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293155622] [2020-10-16 00:10:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:10:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:10:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:10:14,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293155622] [2020-10-16 00:10:14,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484574630] [2020-10-16 00:10:14,305 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:10:14,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:10:14,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:10:14,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:10:14,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:10:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:10:14,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:10:14,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 00:10:14,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052813182] [2020-10-16 00:10:14,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:10:14,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:10:14,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:10:14,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:10:14,390 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:10:14,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1038 places, 695 transitions, 39898 flow. Second operand 27 states. [2020-10-16 00:10:14,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:10:14,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:10:14,391 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:10:17,486 INFO L129 PetriNetUnfolder]: 667/1862 cut-off events. [2020-10-16 00:10:17,487 INFO L130 PetriNetUnfolder]: For 883631/883637 co-relation queries the response was YES. [2020-10-16 00:10:17,558 INFO L80 FinitePrefix]: Finished finitePrefix Result has 58764 conditions, 1862 events. 667/1862 cut-off events. For 883631/883637 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 12812 event pairs, 0 based on Foata normal form. 8/1870 useless extension candidates. Maximal degree in co-relation 58296. Up to 1179 conditions per place. [2020-10-16 00:10:17,586 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 185 selfloop transitions, 546 changer transitions 0/738 dead transitions. [2020-10-16 00:10:17,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1083 places, 738 transitions, 46658 flow [2020-10-16 00:10:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-16 00:10:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 00:10:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3103 transitions. [2020-10-16 00:10:17,589 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745652173913044 [2020-10-16 00:10:17,589 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3103 transitions. [2020-10-16 00:10:17,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3103 transitions. [2020-10-16 00:10:17,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:10:17,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3103 transitions. [2020-10-16 00:10:17,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-16 00:10:17,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-16 00:10:17,593 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-16 00:10:17,593 INFO L185 Difference]: Start difference. First operand has 1038 places, 695 transitions, 39898 flow. Second operand 46 states and 3103 transitions. [2020-10-16 00:10:17,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1083 places, 738 transitions, 46658 flow [2020-10-16 00:10:25,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1045 places, 738 transitions, 45494 flow, removed 142 selfloop flow, removed 38 redundant places. [2020-10-16 00:10:25,062 INFO L241 Difference]: Finished difference. Result has 1047 places, 697 transitions, 40251 flow [2020-10-16 00:10:25,063 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=38820, PETRI_DIFFERENCE_MINUEND_PLACES=1000, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=40251, PETRI_PLACES=1047, PETRI_TRANSITIONS=697} [2020-10-16 00:10:25,063 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1029 predicate places. [2020-10-16 00:10:25,063 INFO L481 AbstractCegarLoop]: Abstraction has has 1047 places, 697 transitions, 40251 flow [2020-10-16 00:10:25,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:10:25,063 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:10:25,063 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:10:25,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:10:25,264 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:10:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:10:25,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1064717521, now seen corresponding path program 165 times [2020-10-16 00:10:25,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:10:25,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278692562] [2020-10-16 00:10:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:10:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:10:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:10:25,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278692562] [2020-10-16 00:10:25,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126834392] [2020-10-16 00:10:25,654 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:10:25,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 00:10:25,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:10:25,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:10:25,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:10:25,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:10:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:10:25,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:10:25,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 00:10:25,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425308108] [2020-10-16 00:10:25,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:10:25,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:10:25,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:10:25,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:10:25,771 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:10:25,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1047 places, 697 transitions, 40251 flow. Second operand 28 states. [2020-10-16 00:10:25,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:10:25,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:10:25,772 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:10:29,617 INFO L129 PetriNetUnfolder]: 671/1874 cut-off events. [2020-10-16 00:10:29,617 INFO L130 PetriNetUnfolder]: For 888648/888654 co-relation queries the response was YES. [2020-10-16 00:10:29,689 INFO L80 FinitePrefix]: Finished finitePrefix Result has 59242 conditions, 1874 events. 671/1874 cut-off events. For 888648/888654 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 12898 event pairs, 0 based on Foata normal form. 8/1882 useless extension candidates. Maximal degree in co-relation 58772. Up to 1187 conditions per place. [2020-10-16 00:10:29,718 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 149 selfloop transitions, 588 changer transitions 0/744 dead transitions. [2020-10-16 00:10:29,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1093 places, 744 transitions, 47355 flow [2020-10-16 00:10:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 00:10:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 00:10:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3172 transitions. [2020-10-16 00:10:29,721 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748936170212766 [2020-10-16 00:10:29,721 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3172 transitions. [2020-10-16 00:10:29,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3172 transitions. [2020-10-16 00:10:29,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:10:29,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3172 transitions. [2020-10-16 00:10:29,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-16 00:10:29,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-16 00:10:29,724 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-16 00:10:29,725 INFO L185 Difference]: Start difference. First operand has 1047 places, 697 transitions, 40251 flow. Second operand 47 states and 3172 transitions. [2020-10-16 00:10:29,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1093 places, 744 transitions, 47355 flow [2020-10-16 00:10:36,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1052 places, 744 transitions, 46121 flow, removed 148 selfloop flow, removed 41 redundant places. [2020-10-16 00:10:36,504 INFO L241 Difference]: Finished difference. Result has 1054 places, 701 transitions, 40730 flow [2020-10-16 00:10:36,504 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=39107, PETRI_DIFFERENCE_MINUEND_PLACES=1006, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=40730, PETRI_PLACES=1054, PETRI_TRANSITIONS=701} [2020-10-16 00:10:36,505 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1036 predicate places. [2020-10-16 00:10:36,505 INFO L481 AbstractCegarLoop]: Abstraction has has 1054 places, 701 transitions, 40730 flow [2020-10-16 00:10:36,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:10:36,505 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:10:36,505 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:10:36,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 00:10:36,706 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:10:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:10:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1551800371, now seen corresponding path program 166 times [2020-10-16 00:10:36,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:10:36,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634524515] [2020-10-16 00:10:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:10:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:10:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:10:37,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634524515] [2020-10-16 00:10:37,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492628719] [2020-10-16 00:10:37,088 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:10:37,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:10:37,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:10:37,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:10:37,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:10:37,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:10:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:10:37,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:10:37,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 00:10:37,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069171038] [2020-10-16 00:10:37,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:10:37,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:10:37,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:10:37,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:10:37,202 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:10:37,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1054 places, 701 transitions, 40730 flow. Second operand 28 states. [2020-10-16 00:10:37,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:10:37,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:10:37,203 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:10:41,189 INFO L129 PetriNetUnfolder]: 673/1880 cut-off events. [2020-10-16 00:10:41,189 INFO L130 PetriNetUnfolder]: For 891019/891025 co-relation queries the response was YES. [2020-10-16 00:10:41,261 INFO L80 FinitePrefix]: Finished finitePrefix Result has 59568 conditions, 1880 events. 673/1880 cut-off events. For 891019/891025 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 12941 event pairs, 0 based on Foata normal form. 8/1888 useless extension candidates. Maximal degree in co-relation 59096. Up to 1191 conditions per place. [2020-10-16 00:10:41,290 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 129 selfloop transitions, 612 changer transitions 0/748 dead transitions. [2020-10-16 00:10:41,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1102 places, 748 transitions, 48002 flow [2020-10-16 00:10:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-16 00:10:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 00:10:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3308 transitions. [2020-10-16 00:10:41,293 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751020408163265 [2020-10-16 00:10:41,293 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3308 transitions. [2020-10-16 00:10:41,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3308 transitions. [2020-10-16 00:10:41,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:10:41,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3308 transitions. [2020-10-16 00:10:41,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 50 states. [2020-10-16 00:10:41,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 50 states. [2020-10-16 00:10:41,297 INFO L81 ComplementDD]: Finished complementDD. Result 50 states. [2020-10-16 00:10:41,297 INFO L185 Difference]: Start difference. First operand has 1054 places, 701 transitions, 40730 flow. Second operand 49 states and 3308 transitions. [2020-10-16 00:10:41,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1102 places, 748 transitions, 48002 flow [2020-10-16 00:10:48,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1057 places, 748 transitions, 46574 flow, removed 150 selfloop flow, removed 45 redundant places. [2020-10-16 00:10:48,763 INFO L241 Difference]: Finished difference. Result has 1059 places, 703 transitions, 40990 flow [2020-10-16 00:10:48,764 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=39396, PETRI_DIFFERENCE_MINUEND_PLACES=1009, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=610, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=40990, PETRI_PLACES=1059, PETRI_TRANSITIONS=703} [2020-10-16 00:10:48,764 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1041 predicate places. [2020-10-16 00:10:48,764 INFO L481 AbstractCegarLoop]: Abstraction has has 1059 places, 703 transitions, 40990 flow [2020-10-16 00:10:48,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:10:48,764 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:10:48,764 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:10:48,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 00:10:48,965 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:10:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:10:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1552290481, now seen corresponding path program 167 times [2020-10-16 00:10:48,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:10:48,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980788303] [2020-10-16 00:10:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:10:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:10:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:10:49,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980788303] [2020-10-16 00:10:49,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918841882] [2020-10-16 00:10:49,376 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:10:49,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 00:10:49,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:10:49,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:10:49,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:10:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:10:49,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:10:49,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 00:10:49,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651213597] [2020-10-16 00:10:49,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 00:10:49,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:10:49,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 00:10:49,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-16 00:10:49,472 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:10:49,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1059 places, 703 transitions, 40990 flow. Second operand 27 states. [2020-10-16 00:10:49,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:10:49,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:10:49,472 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:10:53,019 INFO L129 PetriNetUnfolder]: 682/1901 cut-off events. [2020-10-16 00:10:53,019 INFO L130 PetriNetUnfolder]: For 904495/904497 co-relation queries the response was YES. [2020-10-16 00:10:53,093 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60566 conditions, 1901 events. 682/1901 cut-off events. For 904495/904497 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 12909 event pairs, 0 based on Foata normal form. 4/1905 useless extension candidates. Maximal degree in co-relation 60092. Up to 1205 conditions per place. [2020-10-16 00:10:53,122 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 120 selfloop transitions, 630 changer transitions 0/757 dead transitions. [2020-10-16 00:10:53,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1110 places, 757 transitions, 49102 flow [2020-10-16 00:10:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-16 00:10:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 00:10:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3512 transitions. [2020-10-16 00:10:53,125 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753846153846154 [2020-10-16 00:10:53,125 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3512 transitions. [2020-10-16 00:10:53,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3512 transitions. [2020-10-16 00:10:53,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:10:53,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3512 transitions. [2020-10-16 00:10:53,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 53 states. [2020-10-16 00:10:53,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 53 states. [2020-10-16 00:10:53,129 INFO L81 ComplementDD]: Finished complementDD. Result 53 states. [2020-10-16 00:10:53,130 INFO L185 Difference]: Start difference. First operand has 1059 places, 703 transitions, 40990 flow. Second operand 52 states and 3512 transitions. [2020-10-16 00:10:53,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1110 places, 757 transitions, 49102 flow [2020-10-16 00:11:00,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1064 places, 757 transitions, 47688 flow, removed 155 selfloop flow, removed 46 redundant places. [2020-10-16 00:11:00,817 INFO L241 Difference]: Finished difference. Result has 1068 places, 709 transitions, 41788 flow [2020-10-16 00:11:00,817 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=39684, PETRI_DIFFERENCE_MINUEND_PLACES=1013, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=41788, PETRI_PLACES=1068, PETRI_TRANSITIONS=709} [2020-10-16 00:11:00,818 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1050 predicate places. [2020-10-16 00:11:00,818 INFO L481 AbstractCegarLoop]: Abstraction has has 1068 places, 709 transitions, 41788 flow [2020-10-16 00:11:00,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 00:11:00,818 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:11:00,818 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:11:01,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 00:11:01,019 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:11:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:11:01,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1552307221, now seen corresponding path program 168 times [2020-10-16 00:11:01,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:11:01,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98010333] [2020-10-16 00:11:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:11:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:11:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:01,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98010333] [2020-10-16 00:11:01,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281005616] [2020-10-16 00:11:01,420 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:11:01,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 00:11:01,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:11:01,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 00:11:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:11:01,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:11:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:01,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:11:01,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 00:11:01,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886165177] [2020-10-16 00:11:01,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:11:01,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:11:01,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:11:01,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:11:01,538 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:11:01,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1068 places, 709 transitions, 41788 flow. Second operand 28 states. [2020-10-16 00:11:01,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:11:01,539 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:11:01,539 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:11:05,589 INFO L129 PetriNetUnfolder]: 679/1895 cut-off events. [2020-10-16 00:11:05,589 INFO L130 PetriNetUnfolder]: For 946862/946868 co-relation queries the response was YES. [2020-10-16 00:11:05,663 INFO L80 FinitePrefix]: Finished finitePrefix Result has 61239 conditions, 1895 events. 679/1895 cut-off events. For 946862/946868 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13055 event pairs, 0 based on Foata normal form. 8/1903 useless extension candidates. Maximal degree in co-relation 60761. Up to 1201 conditions per place. [2020-10-16 00:11:05,693 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 120 selfloop transitions, 630 changer transitions 0/757 dead transitions. [2020-10-16 00:11:05,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1118 places, 757 transitions, 49352 flow [2020-10-16 00:11:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-16 00:11:05,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 00:11:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3444 transitions. [2020-10-16 00:11:05,698 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752941176470588 [2020-10-16 00:11:05,698 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3444 transitions. [2020-10-16 00:11:05,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3444 transitions. [2020-10-16 00:11:05,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:11:05,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3444 transitions. [2020-10-16 00:11:05,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 52 states. [2020-10-16 00:11:05,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 52 states. [2020-10-16 00:11:05,705 INFO L81 ComplementDD]: Finished complementDD. Result 52 states. [2020-10-16 00:11:05,705 INFO L185 Difference]: Start difference. First operand has 1068 places, 709 transitions, 41788 flow. Second operand 51 states and 3444 transitions. [2020-10-16 00:11:05,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1118 places, 757 transitions, 49352 flow [2020-10-16 00:11:12,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1071 places, 757 transitions, 47614 flow, removed 280 selfloop flow, removed 47 redundant places. [2020-10-16 00:11:12,128 INFO L241 Difference]: Finished difference. Result has 1073 places, 710 transitions, 41586 flow [2020-10-16 00:11:12,129 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=40050, PETRI_DIFFERENCE_MINUEND_PLACES=1021, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=41586, PETRI_PLACES=1073, PETRI_TRANSITIONS=710} [2020-10-16 00:11:12,129 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1055 predicate places. [2020-10-16 00:11:12,129 INFO L481 AbstractCegarLoop]: Abstraction has has 1073 places, 710 transitions, 41586 flow [2020-10-16 00:11:12,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:11:12,129 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:11:12,129 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:11:12,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 00:11:12,330 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:11:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:11:12,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1494502320, now seen corresponding path program 169 times [2020-10-16 00:11:12,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:11:12,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077707197] [2020-10-16 00:11:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:11:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:11:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:12,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077707197] [2020-10-16 00:11:12,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291826991] [2020-10-16 00:11:12,897 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:11:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:11:12,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:11:12,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:11:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:12,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:11:12,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 00:11:12,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827368598] [2020-10-16 00:11:12,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:11:12,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:11:12,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:11:12,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:11:12,968 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:11:12,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1073 places, 710 transitions, 41586 flow. Second operand 28 states. [2020-10-16 00:11:12,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:11:12,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:11:12,969 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:11:15,857 INFO L129 PetriNetUnfolder]: 681/1901 cut-off events. [2020-10-16 00:11:15,857 INFO L130 PetriNetUnfolder]: For 965158/965160 co-relation queries the response was YES. [2020-10-16 00:11:15,931 INFO L80 FinitePrefix]: Finished finitePrefix Result has 61610 conditions, 1901 events. 681/1901 cut-off events. For 965158/965160 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13121 event pairs, 0 based on Foata normal form. 2/1903 useless extension candidates. Maximal degree in co-relation 61130. Up to 1203 conditions per place. [2020-10-16 00:11:15,961 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 646 selfloop transitions, 86 changer transitions 0/739 dead transitions. [2020-10-16 00:11:15,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1102 places, 739 transitions, 46724 flow [2020-10-16 00:11:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 00:11:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-16 00:11:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2015 transitions. [2020-10-16 00:11:15,964 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6716666666666666 [2020-10-16 00:11:15,964 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2015 transitions. [2020-10-16 00:11:15,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2015 transitions. [2020-10-16 00:11:15,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:11:15,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2015 transitions. [2020-10-16 00:11:15,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-16 00:11:15,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-16 00:11:15,967 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-16 00:11:15,967 INFO L185 Difference]: Start difference. First operand has 1073 places, 710 transitions, 41586 flow. Second operand 30 states and 2015 transitions. [2020-10-16 00:11:15,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1102 places, 739 transitions, 46724 flow [2020-10-16 00:11:23,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1054 places, 739 transitions, 45328 flow, removed 102 selfloop flow, removed 48 redundant places. [2020-10-16 00:11:23,034 INFO L241 Difference]: Finished difference. Result has 1056 places, 712 transitions, 40712 flow [2020-10-16 00:11:23,034 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=40276, PETRI_DIFFERENCE_MINUEND_PLACES=1025, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=40712, PETRI_PLACES=1056, PETRI_TRANSITIONS=712} [2020-10-16 00:11:23,034 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1038 predicate places. [2020-10-16 00:11:23,034 INFO L481 AbstractCegarLoop]: Abstraction has has 1056 places, 712 transitions, 40712 flow [2020-10-16 00:11:23,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:11:23,035 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:11:23,035 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:11:23,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:11:23,235 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:11:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:11:23,236 INFO L82 PathProgramCache]: Analyzing trace with hash -139129730, now seen corresponding path program 170 times [2020-10-16 00:11:23,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:11:23,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746727445] [2020-10-16 00:11:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:11:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:11:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:23,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746727445] [2020-10-16 00:11:23,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964527196] [2020-10-16 00:11:23,808 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:11:23,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:11:23,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:11:23,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:11:23,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:11:23,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:11:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:23,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:11:23,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 00:11:23,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609531742] [2020-10-16 00:11:23,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 00:11:23,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:11:23,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 00:11:23,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-16 00:11:23,913 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:11:23,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1056 places, 712 transitions, 40712 flow. Second operand 29 states. [2020-10-16 00:11:23,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:11:23,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:11:23,913 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:11:27,049 INFO L129 PetriNetUnfolder]: 685/1913 cut-off events. [2020-10-16 00:11:27,049 INFO L130 PetriNetUnfolder]: For 956197/956203 co-relation queries the response was YES. [2020-10-16 00:11:27,111 INFO L80 FinitePrefix]: Finished finitePrefix Result has 61215 conditions, 1913 events. 685/1913 cut-off events. For 956197/956203 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13214 event pairs, 0 based on Foata normal form. 8/1921 useless extension candidates. Maximal degree in co-relation 60733. Up to 1211 conditions per place. [2020-10-16 00:11:27,141 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 604 selfloop transitions, 132 changer transitions 0/743 dead transitions. [2020-10-16 00:11:27,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1086 places, 743 transitions, 45945 flow [2020-10-16 00:11:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 00:11:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 00:11:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2083 transitions. [2020-10-16 00:11:27,144 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6719354838709677 [2020-10-16 00:11:27,144 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2083 transitions. [2020-10-16 00:11:27,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2083 transitions. [2020-10-16 00:11:27,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:11:27,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2083 transitions. [2020-10-16 00:11:27,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 00:11:27,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 00:11:27,148 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 00:11:27,148 INFO L185 Difference]: Start difference. First operand has 1056 places, 712 transitions, 40712 flow. Second operand 31 states and 2083 transitions. [2020-10-16 00:11:27,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1086 places, 743 transitions, 45945 flow [2020-10-16 00:11:33,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1059 places, 743 transitions, 45555 flow, removed 113 selfloop flow, removed 27 redundant places. [2020-10-16 00:11:33,914 INFO L241 Difference]: Finished difference. Result has 1061 places, 716 transitions, 41007 flow [2020-10-16 00:11:33,915 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=40350, PETRI_DIFFERENCE_MINUEND_PLACES=1029, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=41007, PETRI_PLACES=1061, PETRI_TRANSITIONS=716} [2020-10-16 00:11:33,915 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1043 predicate places. [2020-10-16 00:11:33,915 INFO L481 AbstractCegarLoop]: Abstraction has has 1061 places, 716 transitions, 41007 flow [2020-10-16 00:11:33,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 00:11:33,915 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:11:33,915 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:11:34,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:11:34,116 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:11:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:11:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash 151282226, now seen corresponding path program 171 times [2020-10-16 00:11:34,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:11:34,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484449246] [2020-10-16 00:11:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:11:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:11:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:34,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484449246] [2020-10-16 00:11:34,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309847644] [2020-10-16 00:11:34,659 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:11:34,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 00:11:34,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:11:34,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:11:34,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:11:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:34,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:11:34,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 00:11:34,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938122024] [2020-10-16 00:11:34,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:11:34,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:11:34,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:11:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:11:34,739 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:11:34,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 716 transitions, 41007 flow. Second operand 28 states. [2020-10-16 00:11:34,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:11:34,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:11:34,740 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:11:37,739 INFO L129 PetriNetUnfolder]: 689/1925 cut-off events. [2020-10-16 00:11:37,739 INFO L130 PetriNetUnfolder]: For 979648/979654 co-relation queries the response was YES. [2020-10-16 00:11:37,814 INFO L80 FinitePrefix]: Finished finitePrefix Result has 61963 conditions, 1925 events. 689/1925 cut-off events. For 979648/979654 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13287 event pairs, 0 based on Foata normal form. 5/1930 useless extension candidates. Maximal degree in co-relation 61479. Up to 1219 conditions per place. [2020-10-16 00:11:37,844 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 554 selfloop transitions, 188 changer transitions 0/749 dead transitions. [2020-10-16 00:11:37,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1092 places, 749 transitions, 46540 flow [2020-10-16 00:11:37,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 00:11:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 00:11:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2151 transitions. [2020-10-16 00:11:37,847 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6721875 [2020-10-16 00:11:37,847 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2151 transitions. [2020-10-16 00:11:37,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2151 transitions. [2020-10-16 00:11:37,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:11:37,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2151 transitions. [2020-10-16 00:11:37,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 00:11:37,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 00:11:37,849 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 00:11:37,849 INFO L185 Difference]: Start difference. First operand has 1061 places, 716 transitions, 41007 flow. Second operand 32 states and 2151 transitions. [2020-10-16 00:11:37,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1092 places, 749 transitions, 46540 flow [2020-10-16 00:11:45,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1064 places, 749 transitions, 46020 flow, removed 136 selfloop flow, removed 28 redundant places. [2020-10-16 00:11:45,539 INFO L241 Difference]: Finished difference. Result has 1066 places, 720 transitions, 41330 flow [2020-10-16 00:11:45,540 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=40553, PETRI_DIFFERENCE_MINUEND_PLACES=1033, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=41330, PETRI_PLACES=1066, PETRI_TRANSITIONS=720} [2020-10-16 00:11:45,540 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1048 predicate places. [2020-10-16 00:11:45,540 INFO L481 AbstractCegarLoop]: Abstraction has has 1066 places, 720 transitions, 41330 flow [2020-10-16 00:11:45,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:11:45,540 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:11:45,540 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:11:45,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-16 00:11:45,754 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:11:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:11:45,754 INFO L82 PathProgramCache]: Analyzing trace with hash -887486058, now seen corresponding path program 172 times [2020-10-16 00:11:45,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:11:45,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420973014] [2020-10-16 00:11:45,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:11:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:11:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:46,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420973014] [2020-10-16 00:11:46,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700984063] [2020-10-16 00:11:46,325 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:11:46,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:11:46,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:11:46,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:11:46,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:11:46,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:11:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:46,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:11:46,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 00:11:46,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175847907] [2020-10-16 00:11:46,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 00:11:46,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:11:46,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 00:11:46,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-10-16 00:11:46,431 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:11:46,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1066 places, 720 transitions, 41330 flow. Second operand 29 states. [2020-10-16 00:11:46,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:11:46,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:11:46,432 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:11:49,379 INFO L129 PetriNetUnfolder]: 691/1931 cut-off events. [2020-10-16 00:11:49,379 INFO L130 PetriNetUnfolder]: For 982033/982039 co-relation queries the response was YES. [2020-10-16 00:11:49,455 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62200 conditions, 1931 events. 691/1931 cut-off events. For 982033/982039 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13344 event pairs, 0 based on Foata normal form. 8/1939 useless extension candidates. Maximal degree in co-relation 61714. Up to 1223 conditions per place. [2020-10-16 00:11:49,485 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 514 selfloop transitions, 230 changer transitions 0/751 dead transitions. [2020-10-16 00:11:49,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1098 places, 751 transitions, 46748 flow [2020-10-16 00:11:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 00:11:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-16 00:11:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2219 transitions. [2020-10-16 00:11:49,488 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6724242424242424 [2020-10-16 00:11:49,488 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2219 transitions. [2020-10-16 00:11:49,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2219 transitions. [2020-10-16 00:11:49,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:11:49,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2219 transitions. [2020-10-16 00:11:49,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-16 00:11:49,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-16 00:11:49,491 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-16 00:11:49,491 INFO L185 Difference]: Start difference. First operand has 1066 places, 720 transitions, 41330 flow. Second operand 33 states and 2219 transitions. [2020-10-16 00:11:49,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1098 places, 751 transitions, 46748 flow [2020-10-16 00:11:57,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1069 places, 751 transitions, 46128 flow, removed 134 selfloop flow, removed 29 redundant places. [2020-10-16 00:11:57,179 INFO L241 Difference]: Finished difference. Result has 1071 places, 722 transitions, 41522 flow [2020-10-16 00:11:57,180 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=40772, PETRI_DIFFERENCE_MINUEND_PLACES=1037, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=41522, PETRI_PLACES=1071, PETRI_TRANSITIONS=722} [2020-10-16 00:11:57,180 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1053 predicate places. [2020-10-16 00:11:57,180 INFO L481 AbstractCegarLoop]: Abstraction has has 1071 places, 722 transitions, 41522 flow [2020-10-16 00:11:57,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 00:11:57,180 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:11:57,180 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:11:57,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:11:57,381 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:11:57,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:11:57,381 INFO L82 PathProgramCache]: Analyzing trace with hash -472702828, now seen corresponding path program 173 times [2020-10-16 00:11:57,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:11:57,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508170512] [2020-10-16 00:11:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:11:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:11:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:57,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508170512] [2020-10-16 00:11:57,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411898286] [2020-10-16 00:11:57,926 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:11:57,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 00:11:57,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:11:57,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:11:57,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:11:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:11:58,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:11:58,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 00:11:58,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117497107] [2020-10-16 00:11:58,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:11:58,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:11:58,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:11:58,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:11:58,006 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:11:58,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1071 places, 722 transitions, 41522 flow. Second operand 28 states. [2020-10-16 00:11:58,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:11:58,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:11:58,007 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:12:01,110 INFO L129 PetriNetUnfolder]: 695/1943 cut-off events. [2020-10-16 00:12:01,110 INFO L130 PetriNetUnfolder]: For 987132/987134 co-relation queries the response was YES. [2020-10-16 00:12:01,187 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62619 conditions, 1943 events. 695/1943 cut-off events. For 987132/987134 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13458 event pairs, 0 based on Foata normal form. 2/1945 useless extension candidates. Maximal degree in co-relation 62131. Up to 1231 conditions per place. [2020-10-16 00:12:01,217 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 468 selfloop transitions, 282 changer transitions 0/757 dead transitions. [2020-10-16 00:12:01,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1104 places, 757 transitions, 47315 flow [2020-10-16 00:12:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 00:12:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 00:12:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2287 transitions. [2020-10-16 00:12:01,220 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6726470588235294 [2020-10-16 00:12:01,220 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2287 transitions. [2020-10-16 00:12:01,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2287 transitions. [2020-10-16 00:12:01,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:12:01,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2287 transitions. [2020-10-16 00:12:01,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-16 00:12:01,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-16 00:12:01,223 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-16 00:12:01,223 INFO L185 Difference]: Start difference. First operand has 1071 places, 722 transitions, 41522 flow. Second operand 34 states and 2287 transitions. [2020-10-16 00:12:01,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1104 places, 757 transitions, 47315 flow [2020-10-16 00:12:09,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1074 places, 757 transitions, 46619 flow, removed 134 selfloop flow, removed 30 redundant places. [2020-10-16 00:12:09,375 INFO L241 Difference]: Finished difference. Result has 1076 places, 726 transitions, 41867 flow [2020-10-16 00:12:09,375 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=40892, PETRI_DIFFERENCE_MINUEND_PLACES=1041, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=41867, PETRI_PLACES=1076, PETRI_TRANSITIONS=726} [2020-10-16 00:12:09,375 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1058 predicate places. [2020-10-16 00:12:09,375 INFO L481 AbstractCegarLoop]: Abstraction has has 1076 places, 726 transitions, 41867 flow [2020-10-16 00:12:09,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:12:09,376 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:12:09,376 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:12:09,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:12:09,576 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:12:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:12:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash -199096000, now seen corresponding path program 174 times [2020-10-16 00:12:09,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:12:09,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147454324] [2020-10-16 00:12:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:12:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:12:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:12:10,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147454324] [2020-10-16 00:12:10,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269888966] [2020-10-16 00:12:10,089 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:12:10,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 00:12:10,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:12:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:12:10,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:12:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:12:10,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:12:10,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 00:12:10,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455803848] [2020-10-16 00:12:10,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:12:10,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:12:10,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:12:10,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:12:10,172 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:12:10,173 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1076 places, 726 transitions, 41867 flow. Second operand 28 states. [2020-10-16 00:12:10,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:12:10,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:12:10,173 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:12:13,417 INFO L129 PetriNetUnfolder]: 699/1955 cut-off events. [2020-10-16 00:12:13,417 INFO L130 PetriNetUnfolder]: For 992220/992222 co-relation queries the response was YES. [2020-10-16 00:12:13,495 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63062 conditions, 1955 events. 699/1955 cut-off events. For 992220/992222 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13504 event pairs, 0 based on Foata normal form. 2/1957 useless extension candidates. Maximal degree in co-relation 62572. Up to 1239 conditions per place. [2020-10-16 00:12:13,525 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 400 selfloop transitions, 356 changer transitions 0/763 dead transitions. [2020-10-16 00:12:13,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1111 places, 763 transitions, 47930 flow [2020-10-16 00:12:13,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 00:12:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 00:12:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2423 transitions. [2020-10-16 00:12:13,528 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6730555555555555 [2020-10-16 00:12:13,528 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2423 transitions. [2020-10-16 00:12:13,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2423 transitions. [2020-10-16 00:12:13,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:12:13,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2423 transitions. [2020-10-16 00:12:13,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 00:12:13,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 00:12:13,531 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 00:12:13,531 INFO L185 Difference]: Start difference. First operand has 1076 places, 726 transitions, 41867 flow. Second operand 36 states and 2423 transitions. [2020-10-16 00:12:13,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1111 places, 763 transitions, 47930 flow [2020-10-16 00:12:20,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1080 places, 763 transitions, 47134 flow, removed 136 selfloop flow, removed 31 redundant places. [2020-10-16 00:12:21,005 INFO L241 Difference]: Finished difference. Result has 1082 places, 730 transitions, 42277 flow [2020-10-16 00:12:21,006 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=41141, PETRI_DIFFERENCE_MINUEND_PLACES=1045, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=42277, PETRI_PLACES=1082, PETRI_TRANSITIONS=730} [2020-10-16 00:12:21,006 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1064 predicate places. [2020-10-16 00:12:21,006 INFO L481 AbstractCegarLoop]: Abstraction has has 1082 places, 730 transitions, 42277 flow [2020-10-16 00:12:21,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:12:21,006 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:12:21,006 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:12:21,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:12:21,207 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:12:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:12:21,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1747254620, now seen corresponding path program 175 times [2020-10-16 00:12:21,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:12:21,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72743794] [2020-10-16 00:12:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:12:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:12:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:12:21,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72743794] [2020-10-16 00:12:21,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877906670] [2020-10-16 00:12:21,719 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:12:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:12:21,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:12:21,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:12:21,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:12:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:12:21,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:12:21,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 00:12:21,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157996448] [2020-10-16 00:12:21,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 00:12:21,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:12:21,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 00:12:21,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-16 00:12:21,824 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:12:21,824 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1082 places, 730 transitions, 42277 flow. Second operand 29 states. [2020-10-16 00:12:21,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:12:21,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:12:21,824 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:12:25,620 INFO L129 PetriNetUnfolder]: 703/1967 cut-off events. [2020-10-16 00:12:25,620 INFO L130 PetriNetUnfolder]: For 997317/997323 co-relation queries the response was YES. [2020-10-16 00:12:25,683 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63537 conditions, 1967 events. 703/1967 cut-off events. For 997317/997323 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13627 event pairs, 0 based on Foata normal form. 8/1975 useless extension candidates. Maximal degree in co-relation 63045. Up to 1247 conditions per place. [2020-10-16 00:12:25,716 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 370 selfloop transitions, 390 changer transitions 0/767 dead transitions. [2020-10-16 00:12:25,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1118 places, 767 transitions, 48352 flow [2020-10-16 00:12:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 00:12:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 00:12:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2491 transitions. [2020-10-16 00:12:25,718 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6732432432432433 [2020-10-16 00:12:25,718 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2491 transitions. [2020-10-16 00:12:25,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2491 transitions. [2020-10-16 00:12:25,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:12:25,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2491 transitions. [2020-10-16 00:12:25,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 00:12:25,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 00:12:25,721 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 00:12:25,721 INFO L185 Difference]: Start difference. First operand has 1082 places, 730 transitions, 42277 flow. Second operand 37 states and 2491 transitions. [2020-10-16 00:12:25,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1118 places, 767 transitions, 48352 flow [2020-10-16 00:12:32,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1086 places, 767 transitions, 47437 flow, removed 140 selfloop flow, removed 32 redundant places. [2020-10-16 00:12:32,083 INFO L241 Difference]: Finished difference. Result has 1088 places, 734 transitions, 42648 flow [2020-10-16 00:12:32,083 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=41436, PETRI_DIFFERENCE_MINUEND_PLACES=1050, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=42648, PETRI_PLACES=1088, PETRI_TRANSITIONS=734} [2020-10-16 00:12:32,083 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1070 predicate places. [2020-10-16 00:12:32,083 INFO L481 AbstractCegarLoop]: Abstraction has has 1088 places, 734 transitions, 42648 flow [2020-10-16 00:12:32,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 00:12:32,084 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:12:32,084 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:12:32,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:12:32,284 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:12:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:12:32,285 INFO L82 PathProgramCache]: Analyzing trace with hash 435374854, now seen corresponding path program 176 times [2020-10-16 00:12:32,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:12:32,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311681560] [2020-10-16 00:12:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:12:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:12:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:12:32,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311681560] [2020-10-16 00:12:32,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270791194] [2020-10-16 00:12:32,782 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:12:32,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:12:32,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:12:32,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:12:32,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:12:32,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:12:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:12:32,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:12:32,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 00:12:32,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429843916] [2020-10-16 00:12:32,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 00:12:32,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:12:32,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 00:12:32,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-10-16 00:12:32,892 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:12:32,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1088 places, 734 transitions, 42648 flow. Second operand 29 states. [2020-10-16 00:12:32,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:12:32,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:12:32,892 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:12:36,539 INFO L129 PetriNetUnfolder]: 707/1979 cut-off events. [2020-10-16 00:12:36,539 INFO L130 PetriNetUnfolder]: For 1002572/1002574 co-relation queries the response was YES. [2020-10-16 00:12:36,619 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63984 conditions, 1979 events. 707/1979 cut-off events. For 1002572/1002574 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13563 event pairs, 0 based on Foata normal form. 4/1983 useless extension candidates. Maximal degree in co-relation 63490. Up to 1255 conditions per place. [2020-10-16 00:12:36,649 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 306 selfloop transitions, 460 changer transitions 0/773 dead transitions. [2020-10-16 00:12:36,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1126 places, 773 transitions, 48975 flow [2020-10-16 00:12:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 00:12:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 00:12:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2627 transitions. [2020-10-16 00:12:36,652 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6735897435897436 [2020-10-16 00:12:36,652 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2627 transitions. [2020-10-16 00:12:36,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2627 transitions. [2020-10-16 00:12:36,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:12:36,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2627 transitions. [2020-10-16 00:12:36,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-16 00:12:36,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-16 00:12:36,655 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-16 00:12:36,655 INFO L185 Difference]: Start difference. First operand has 1088 places, 734 transitions, 42648 flow. Second operand 39 states and 2627 transitions. [2020-10-16 00:12:36,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1126 places, 773 transitions, 48975 flow [2020-10-16 00:12:44,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1096 places, 773 transitions, 48101 flow, removed 140 selfloop flow, removed 30 redundant places. [2020-10-16 00:12:44,365 INFO L241 Difference]: Finished difference. Result has 1098 places, 738 transitions, 43202 flow [2020-10-16 00:12:44,366 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=41848, PETRI_DIFFERENCE_MINUEND_PLACES=1058, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=456, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=43202, PETRI_PLACES=1098, PETRI_TRANSITIONS=738} [2020-10-16 00:12:44,366 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1080 predicate places. [2020-10-16 00:12:44,366 INFO L481 AbstractCegarLoop]: Abstraction has has 1098 places, 738 transitions, 43202 flow [2020-10-16 00:12:44,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 00:12:44,366 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:12:44,366 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:12:44,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:12:44,567 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:12:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:12:44,568 INFO L82 PathProgramCache]: Analyzing trace with hash 487651460, now seen corresponding path program 177 times [2020-10-16 00:12:44,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:12:44,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629728513] [2020-10-16 00:12:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:12:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:12:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:12:45,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629728513] [2020-10-16 00:12:45,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93126626] [2020-10-16 00:12:45,046 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:12:45,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 00:12:45,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:12:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:12:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:12:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:12:45,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:12:45,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 00:12:45,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622466702] [2020-10-16 00:12:45,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:12:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:12:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:12:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:12:45,146 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:12:45,146 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1098 places, 738 transitions, 43202 flow. Second operand 28 states. [2020-10-16 00:12:45,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:12:45,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:12:45,147 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:12:48,615 INFO L129 PetriNetUnfolder]: 709/1985 cut-off events. [2020-10-16 00:12:48,615 INFO L130 PetriNetUnfolder]: For 1005311/1005313 co-relation queries the response was YES. [2020-10-16 00:12:48,695 INFO L80 FinitePrefix]: Finished finitePrefix Result has 64345 conditions, 1985 events. 709/1985 cut-off events. For 1005311/1005313 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13636 event pairs, 0 based on Foata normal form. 2/1987 useless extension candidates. Maximal degree in co-relation 63849. Up to 1259 conditions per place. [2020-10-16 00:12:48,726 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 270 selfloop transitions, 500 changer transitions 0/777 dead transitions. [2020-10-16 00:12:48,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1137 places, 777 transitions, 49688 flow [2020-10-16 00:12:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 00:12:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 00:12:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2695 transitions. [2020-10-16 00:12:48,730 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67375 [2020-10-16 00:12:48,730 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2695 transitions. [2020-10-16 00:12:48,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2695 transitions. [2020-10-16 00:12:48,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:12:48,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2695 transitions. [2020-10-16 00:12:48,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 00:12:48,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 00:12:48,734 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 00:12:48,734 INFO L185 Difference]: Start difference. First operand has 1098 places, 738 transitions, 43202 flow. Second operand 40 states and 2695 transitions. [2020-10-16 00:12:48,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1137 places, 777 transitions, 49688 flow [2020-10-16 00:12:56,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1099 places, 777 transitions, 48491 flow, removed 142 selfloop flow, removed 38 redundant places. [2020-10-16 00:12:56,098 INFO L241 Difference]: Finished difference. Result has 1101 places, 740 transitions, 43418 flow [2020-10-16 00:12:56,098 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=42083, PETRI_DIFFERENCE_MINUEND_PLACES=1060, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=43418, PETRI_PLACES=1101, PETRI_TRANSITIONS=740} [2020-10-16 00:12:56,098 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1083 predicate places. [2020-10-16 00:12:56,099 INFO L481 AbstractCegarLoop]: Abstraction has has 1101 places, 740 transitions, 43418 flow [2020-10-16 00:12:56,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:12:56,099 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:12:56,099 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:12:56,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-16 00:12:56,300 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:12:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:12:56,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1931066392, now seen corresponding path program 178 times [2020-10-16 00:12:56,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:12:56,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084685902] [2020-10-16 00:12:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:12:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:12:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:12:56,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084685902] [2020-10-16 00:12:56,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774796834] [2020-10-16 00:12:56,775 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:12:56,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:12:56,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:12:56,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:12:56,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:12:56,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:12:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:12:56,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:12:56,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 00:12:56,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130235211] [2020-10-16 00:12:56,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 00:12:56,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:12:56,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 00:12:56,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-16 00:12:56,884 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:12:56,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1101 places, 740 transitions, 43418 flow. Second operand 29 states. [2020-10-16 00:12:56,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:12:56,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:12:56,885 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:13:00,732 INFO L129 PetriNetUnfolder]: 713/1997 cut-off events. [2020-10-16 00:13:00,733 INFO L130 PetriNetUnfolder]: For 1010704/1010710 co-relation queries the response was YES. [2020-10-16 00:13:00,814 INFO L80 FinitePrefix]: Finished finitePrefix Result has 64770 conditions, 1997 events. 713/1997 cut-off events. For 1010704/1010710 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13909 event pairs, 0 based on Foata normal form. 8/2005 useless extension candidates. Maximal degree in co-relation 64272. Up to 1267 conditions per place. [2020-10-16 00:13:00,845 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 248 selfloop transitions, 526 changer transitions 0/781 dead transitions. [2020-10-16 00:13:00,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1141 places, 781 transitions, 50009 flow [2020-10-16 00:13:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 00:13:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 00:13:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2763 transitions. [2020-10-16 00:13:00,848 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6739024390243903 [2020-10-16 00:13:00,848 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2763 transitions. [2020-10-16 00:13:00,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2763 transitions. [2020-10-16 00:13:00,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:13:00,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2763 transitions. [2020-10-16 00:13:00,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-16 00:13:00,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-16 00:13:00,851 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-16 00:13:00,851 INFO L185 Difference]: Start difference. First operand has 1101 places, 740 transitions, 43418 flow. Second operand 41 states and 2763 transitions. [2020-10-16 00:13:00,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1141 places, 781 transitions, 50009 flow [2020-10-16 00:13:08,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1106 places, 781 transitions, 48892 flow, removed 140 selfloop flow, removed 35 redundant places. [2020-10-16 00:13:08,293 INFO L241 Difference]: Finished difference. Result has 1108 places, 744 transitions, 43875 flow [2020-10-16 00:13:08,293 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=42379, PETRI_DIFFERENCE_MINUEND_PLACES=1066, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=43875, PETRI_PLACES=1108, PETRI_TRANSITIONS=744} [2020-10-16 00:13:08,293 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1090 predicate places. [2020-10-16 00:13:08,293 INFO L481 AbstractCegarLoop]: Abstraction has has 1108 places, 744 transitions, 43875 flow [2020-10-16 00:13:08,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 00:13:08,294 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:13:08,294 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:13:08,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 00:13:08,494 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:13:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:13:08,495 INFO L82 PathProgramCache]: Analyzing trace with hash -127058148, now seen corresponding path program 179 times [2020-10-16 00:13:08,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:13:08,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49104471] [2020-10-16 00:13:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:13:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:13:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:13:08,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49104471] [2020-10-16 00:13:08,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580302426] [2020-10-16 00:13:08,958 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:13:09,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 00:13:09,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:13:09,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:13:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:13:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:13:09,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:13:09,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 00:13:09,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017311752] [2020-10-16 00:13:09,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:13:09,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:13:09,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:13:09,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:13:09,045 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:13:09,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1108 places, 744 transitions, 43875 flow. Second operand 28 states. [2020-10-16 00:13:09,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:13:09,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:13:09,046 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:13:12,424 INFO L129 PetriNetUnfolder]: 715/2003 cut-off events. [2020-10-16 00:13:12,424 INFO L130 PetriNetUnfolder]: For 1013591/1013597 co-relation queries the response was YES. [2020-10-16 00:13:12,506 INFO L80 FinitePrefix]: Finished finitePrefix Result has 65086 conditions, 2003 events. 715/2003 cut-off events. For 1013591/1013597 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13947 event pairs, 0 based on Foata normal form. 5/2008 useless extension candidates. Maximal degree in co-relation 64586. Up to 1271 conditions per place. [2020-10-16 00:13:12,538 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 216 selfloop transitions, 562 changer transitions 0/785 dead transitions. [2020-10-16 00:13:12,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1149 places, 785 transitions, 50631 flow [2020-10-16 00:13:12,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 00:13:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 00:13:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2831 transitions. [2020-10-16 00:13:12,542 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674047619047619 [2020-10-16 00:13:12,542 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2831 transitions. [2020-10-16 00:13:12,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2831 transitions. [2020-10-16 00:13:12,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:13:12,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2831 transitions. [2020-10-16 00:13:12,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-16 00:13:12,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-16 00:13:12,548 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-16 00:13:12,548 INFO L185 Difference]: Start difference. First operand has 1108 places, 744 transitions, 43875 flow. Second operand 42 states and 2831 transitions. [2020-10-16 00:13:12,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1149 places, 785 transitions, 50631 flow [2020-10-16 00:13:20,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1113 places, 785 transitions, 49474 flow, removed 142 selfloop flow, removed 36 redundant places. [2020-10-16 00:13:20,822 INFO L241 Difference]: Finished difference. Result has 1115 places, 746 transitions, 44275 flow [2020-10-16 00:13:20,823 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=42800, PETRI_DIFFERENCE_MINUEND_PLACES=1072, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=560, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=44275, PETRI_PLACES=1115, PETRI_TRANSITIONS=746} [2020-10-16 00:13:20,823 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1097 predicate places. [2020-10-16 00:13:20,823 INFO L481 AbstractCegarLoop]: Abstraction has has 1115 places, 746 transitions, 44275 flow [2020-10-16 00:13:20,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:13:20,823 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:13:20,823 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:13:21,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:13:21,024 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:13:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:13:21,024 INFO L82 PathProgramCache]: Analyzing trace with hash 858133376, now seen corresponding path program 180 times [2020-10-16 00:13:21,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:13:21,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607827944] [2020-10-16 00:13:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:13:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:13:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:13:21,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607827944] [2020-10-16 00:13:21,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89143140] [2020-10-16 00:13:21,490 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:13:21,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 00:13:21,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:13:21,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:13:21,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:13:21,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:13:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:13:21,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:13:21,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 00:13:21,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215324107] [2020-10-16 00:13:21,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 00:13:21,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:13:21,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 00:13:21,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-10-16 00:13:21,609 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:13:21,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1115 places, 746 transitions, 44275 flow. Second operand 29 states. [2020-10-16 00:13:21,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:13:21,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:13:21,610 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:13:25,649 INFO L129 PetriNetUnfolder]: 717/2009 cut-off events. [2020-10-16 00:13:25,649 INFO L130 PetriNetUnfolder]: For 1016536/1016538 co-relation queries the response was YES. [2020-10-16 00:13:25,731 INFO L80 FinitePrefix]: Finished finitePrefix Result has 65422 conditions, 2009 events. 717/2009 cut-off events. For 1016536/1016538 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14010 event pairs, 0 based on Foata normal form. 4/2013 useless extension candidates. Maximal degree in co-relation 64920. Up to 1275 conditions per place. [2020-10-16 00:13:25,763 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 196 selfloop transitions, 584 changer transitions 0/787 dead transitions. [2020-10-16 00:13:25,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1157 places, 787 transitions, 51035 flow [2020-10-16 00:13:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 00:13:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 00:13:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2899 transitions. [2020-10-16 00:13:25,766 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674186046511628 [2020-10-16 00:13:25,766 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2899 transitions. [2020-10-16 00:13:25,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2899 transitions. [2020-10-16 00:13:25,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:13:25,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2899 transitions. [2020-10-16 00:13:25,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 44 states. [2020-10-16 00:13:25,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 44 states. [2020-10-16 00:13:25,769 INFO L81 ComplementDD]: Finished complementDD. Result 44 states. [2020-10-16 00:13:25,769 INFO L185 Difference]: Start difference. First operand has 1115 places, 746 transitions, 44275 flow. Second operand 43 states and 2899 transitions. [2020-10-16 00:13:25,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1157 places, 787 transitions, 51035 flow [2020-10-16 00:13:34,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1118 places, 787 transitions, 49720 flow, removed 142 selfloop flow, removed 39 redundant places. [2020-10-16 00:13:34,184 INFO L241 Difference]: Finished difference. Result has 1120 places, 748 transitions, 44569 flow [2020-10-16 00:13:34,185 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=43042, PETRI_DIFFERENCE_MINUEND_PLACES=1076, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=44569, PETRI_PLACES=1120, PETRI_TRANSITIONS=748} [2020-10-16 00:13:34,185 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1102 predicate places. [2020-10-16 00:13:34,185 INFO L481 AbstractCegarLoop]: Abstraction has has 1120 places, 748 transitions, 44569 flow [2020-10-16 00:13:34,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 00:13:34,185 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:13:34,185 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:13:34,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-16 00:13:34,386 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:13:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:13:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash -759025666, now seen corresponding path program 181 times [2020-10-16 00:13:34,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:13:34,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989847755] [2020-10-16 00:13:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:13:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:13:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:13:34,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989847755] [2020-10-16 00:13:34,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059912399] [2020-10-16 00:13:34,845 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:13:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:13:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:13:34,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:13:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:13:34,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:13:34,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 00:13:34,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936888981] [2020-10-16 00:13:34,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:13:34,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:13:34,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:13:34,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:13:34,929 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:13:34,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1120 places, 748 transitions, 44569 flow. Second operand 28 states. [2020-10-16 00:13:34,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:13:34,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:13:34,930 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:13:38,767 INFO L129 PetriNetUnfolder]: 721/2021 cut-off events. [2020-10-16 00:13:38,768 INFO L130 PetriNetUnfolder]: For 1022128/1022134 co-relation queries the response was YES. [2020-10-16 00:13:38,851 INFO L80 FinitePrefix]: Finished finitePrefix Result has 65880 conditions, 2021 events. 721/2021 cut-off events. For 1022128/1022134 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14082 event pairs, 0 based on Foata normal form. 5/2026 useless extension candidates. Maximal degree in co-relation 65376. Up to 1283 conditions per place. [2020-10-16 00:13:38,883 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 170 selfloop transitions, 616 changer transitions 0/793 dead transitions. [2020-10-16 00:13:38,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1163 places, 793 transitions, 51680 flow [2020-10-16 00:13:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 00:13:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 00:13:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2967 transitions. [2020-10-16 00:13:38,886 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743181818181818 [2020-10-16 00:13:38,886 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2967 transitions. [2020-10-16 00:13:38,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2967 transitions. [2020-10-16 00:13:38,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:13:38,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2967 transitions. [2020-10-16 00:13:38,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-16 00:13:38,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-16 00:13:38,892 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-16 00:13:38,892 INFO L185 Difference]: Start difference. First operand has 1120 places, 748 transitions, 44569 flow. Second operand 44 states and 2967 transitions. [2020-10-16 00:13:38,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1163 places, 793 transitions, 51680 flow [2020-10-16 00:13:47,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1124 places, 793 transitions, 50331 flow, removed 144 selfloop flow, removed 39 redundant places. [2020-10-16 00:13:47,048 INFO L241 Difference]: Finished difference. Result has 1126 places, 752 transitions, 44994 flow [2020-10-16 00:13:47,049 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=43306, PETRI_DIFFERENCE_MINUEND_PLACES=1081, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=44994, PETRI_PLACES=1126, PETRI_TRANSITIONS=752} [2020-10-16 00:13:47,049 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1108 predicate places. [2020-10-16 00:13:47,049 INFO L481 AbstractCegarLoop]: Abstraction has has 1126 places, 752 transitions, 44994 flow [2020-10-16 00:13:47,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:13:47,049 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:13:47,049 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:13:47,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:13:47,250 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:13:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:13:47,250 INFO L82 PathProgramCache]: Analyzing trace with hash 998370090, now seen corresponding path program 182 times [2020-10-16 00:13:47,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:13:47,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447430924] [2020-10-16 00:13:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:13:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:13:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:13:47,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447430924] [2020-10-16 00:13:47,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096498920] [2020-10-16 00:13:47,704 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:13:47,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:13:47,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:13:47,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:13:47,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:13:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:13:47,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:13:47,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 00:13:47,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020578549] [2020-10-16 00:13:47,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:13:47,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:13:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:13:47,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:13:47,789 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:13:47,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1126 places, 752 transitions, 44994 flow. Second operand 28 states. [2020-10-16 00:13:47,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:13:47,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:13:47,790 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:13:51,670 INFO L129 PetriNetUnfolder]: 723/2027 cut-off events. [2020-10-16 00:13:51,670 INFO L130 PetriNetUnfolder]: For 1025190/1025192 co-relation queries the response was YES. [2020-10-16 00:13:51,765 INFO L80 FinitePrefix]: Finished finitePrefix Result has 66184 conditions, 2027 events. 723/2027 cut-off events. For 1025190/1025192 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14121 event pairs, 0 based on Foata normal form. 2/2029 useless extension candidates. Maximal degree in co-relation 65678. Up to 1287 conditions per place. [2020-10-16 00:13:51,797 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 140 selfloop transitions, 650 changer transitions 0/797 dead transitions. [2020-10-16 00:13:51,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1171 places, 797 transitions, 52282 flow [2020-10-16 00:13:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-16 00:13:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 00:13:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3103 transitions. [2020-10-16 00:13:51,800 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745652173913044 [2020-10-16 00:13:51,800 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3103 transitions. [2020-10-16 00:13:51,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3103 transitions. [2020-10-16 00:13:51,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:13:51,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3103 transitions. [2020-10-16 00:13:51,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-16 00:13:52,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-16 00:13:52,042 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-16 00:13:52,042 INFO L185 Difference]: Start difference. First operand has 1126 places, 752 transitions, 44994 flow. Second operand 46 states and 3103 transitions. [2020-10-16 00:13:52,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1171 places, 797 transitions, 52282 flow [2020-10-16 00:13:59,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1129 places, 797 transitions, 50861 flow, removed 146 selfloop flow, removed 42 redundant places. [2020-10-16 00:13:59,390 INFO L241 Difference]: Finished difference. Result has 1131 places, 754 transitions, 45338 flow [2020-10-16 00:13:59,390 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=43663, PETRI_DIFFERENCE_MINUEND_PLACES=1084, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=648, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=45338, PETRI_PLACES=1131, PETRI_TRANSITIONS=754} [2020-10-16 00:13:59,390 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1113 predicate places. [2020-10-16 00:13:59,390 INFO L481 AbstractCegarLoop]: Abstraction has has 1131 places, 754 transitions, 45338 flow [2020-10-16 00:13:59,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:13:59,391 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:13:59,391 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:13:59,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:13:59,591 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:13:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:13:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1518113166, now seen corresponding path program 183 times [2020-10-16 00:13:59,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:13:59,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383845974] [2020-10-16 00:13:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:13:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:14:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:14:00,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383845974] [2020-10-16 00:14:00,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613002759] [2020-10-16 00:14:00,044 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:14:00,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 00:14:00,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:14:00,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:14:00,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:14:00,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:14:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:14:00,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:14:00,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 00:14:00,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675735669] [2020-10-16 00:14:00,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 00:14:00,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:14:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 00:14:00,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-10-16 00:14:00,165 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:14:00,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1131 places, 754 transitions, 45338 flow. Second operand 29 states. [2020-10-16 00:14:00,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:14:00,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:14:00,166 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:14:04,585 INFO L129 PetriNetUnfolder]: 727/2039 cut-off events. [2020-10-16 00:14:04,585 INFO L130 PetriNetUnfolder]: For 1030895/1030901 co-relation queries the response was YES. [2020-10-16 00:14:04,670 INFO L80 FinitePrefix]: Finished finitePrefix Result has 66665 conditions, 2039 events. 727/2039 cut-off events. For 1030895/1030901 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14266 event pairs, 0 based on Foata normal form. 8/2047 useless extension candidates. Maximal degree in co-relation 66157. Up to 1295 conditions per place. [2020-10-16 00:14:04,702 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 130 selfloop transitions, 664 changer transitions 0/801 dead transitions. [2020-10-16 00:14:04,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1177 places, 801 transitions, 52713 flow [2020-10-16 00:14:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 00:14:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 00:14:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3171 transitions. [2020-10-16 00:14:04,705 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6746808510638298 [2020-10-16 00:14:04,705 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3171 transitions. [2020-10-16 00:14:04,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3171 transitions. [2020-10-16 00:14:04,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:14:04,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3171 transitions. [2020-10-16 00:14:04,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-16 00:14:04,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-16 00:14:04,709 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-16 00:14:04,709 INFO L185 Difference]: Start difference. First operand has 1131 places, 754 transitions, 45338 flow. Second operand 47 states and 3171 transitions. [2020-10-16 00:14:04,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1177 places, 801 transitions, 52713 flow [2020-10-16 00:14:12,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1135 places, 801 transitions, 51298 flow, removed 146 selfloop flow, removed 42 redundant places. [2020-10-16 00:14:12,427 INFO L241 Difference]: Finished difference. Result has 1137 places, 758 transitions, 45807 flow [2020-10-16 00:14:12,428 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=44013, PETRI_DIFFERENCE_MINUEND_PLACES=1089, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=660, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=45807, PETRI_PLACES=1137, PETRI_TRANSITIONS=758} [2020-10-16 00:14:12,428 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1119 predicate places. [2020-10-16 00:14:12,428 INFO L481 AbstractCegarLoop]: Abstraction has has 1137 places, 758 transitions, 45807 flow [2020-10-16 00:14:12,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 00:14:12,429 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:14:12,429 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:14:12,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:14:12,643 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:14:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:14:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1924292462, now seen corresponding path program 184 times [2020-10-16 00:14:12,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:14:12,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266027312] [2020-10-16 00:14:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:14:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:14:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:14:13,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266027312] [2020-10-16 00:14:13,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307302208] [2020-10-16 00:14:13,082 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:14:13,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:14:13,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:14:13,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:14:13,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:14:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:14:13,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:14:13,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 00:14:13,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853174620] [2020-10-16 00:14:13,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 00:14:13,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:14:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 00:14:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-16 00:14:13,173 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:14:13,173 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1137 places, 758 transitions, 45807 flow. Second operand 28 states. [2020-10-16 00:14:13,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:14:13,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:14:13,173 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:14:17,324 INFO L129 PetriNetUnfolder]: 731/2051 cut-off events. [2020-10-16 00:14:17,324 INFO L130 PetriNetUnfolder]: For 1036560/1036566 co-relation queries the response was YES. [2020-10-16 00:14:17,407 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67165 conditions, 2051 events. 731/2051 cut-off events. For 1036560/1036566 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14342 event pairs, 0 based on Foata normal form. 5/2056 useless extension candidates. Maximal degree in co-relation 66655. Up to 1303 conditions per place. [2020-10-16 00:14:17,440 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 90 selfloop transitions, 712 changer transitions 0/809 dead transitions. [2020-10-16 00:14:17,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1186 places, 809 transitions, 53700 flow [2020-10-16 00:14:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-16 00:14:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 00:14:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3375 transitions. [2020-10-16 00:14:17,443 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:14:17,443 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3375 transitions. [2020-10-16 00:14:17,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3375 transitions. [2020-10-16 00:14:17,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:14:17,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3375 transitions. [2020-10-16 00:14:17,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 51 states. [2020-10-16 00:14:17,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 51 states. [2020-10-16 00:14:17,447 INFO L81 ComplementDD]: Finished complementDD. Result 51 states. [2020-10-16 00:14:17,447 INFO L185 Difference]: Start difference. First operand has 1137 places, 758 transitions, 45807 flow. Second operand 50 states and 3375 transitions. [2020-10-16 00:14:17,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1186 places, 809 transitions, 53700 flow [2020-10-16 00:14:25,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1142 places, 809 transitions, 52197 flow, removed 150 selfloop flow, removed 44 redundant places. [2020-10-16 00:14:25,539 INFO L241 Difference]: Finished difference. Result has 1144 places, 762 transitions, 46301 flow [2020-10-16 00:14:25,539 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=44402, PETRI_DIFFERENCE_MINUEND_PLACES=1093, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=46301, PETRI_PLACES=1144, PETRI_TRANSITIONS=762} [2020-10-16 00:14:25,540 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1126 predicate places. [2020-10-16 00:14:25,540 INFO L481 AbstractCegarLoop]: Abstraction has has 1144 places, 762 transitions, 46301 flow [2020-10-16 00:14:25,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 00:14:25,540 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:14:25,540 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:14:25,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:14:25,741 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:14:25,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:14:25,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1940379602, now seen corresponding path program 185 times [2020-10-16 00:14:25,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:14:25,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450406354] [2020-10-16 00:14:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:14:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:14:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:14:26,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450406354] [2020-10-16 00:14:26,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027303065] [2020-10-16 00:14:26,195 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:14:26,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 00:14:26,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:14:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:14:26,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:14:26,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:14:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:14:26,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:14:26,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 00:14:26,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981617178] [2020-10-16 00:14:26,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 00:14:26,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:14:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 00:14:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-16 00:14:26,319 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:14:26,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1144 places, 762 transitions, 46301 flow. Second operand 29 states. [2020-10-16 00:14:26,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:14:26,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:14:26,320 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:14:31,063 INFO L129 PetriNetUnfolder]: 733/2056 cut-off events. [2020-10-16 00:14:31,063 INFO L130 PetriNetUnfolder]: For 1038964/1038970 co-relation queries the response was YES. [2020-10-16 00:14:31,150 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67508 conditions, 2056 events. 733/2056 cut-off events. For 1038964/1038970 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14398 event pairs, 0 based on Foata normal form. 8/2064 useless extension candidates. Maximal degree in co-relation 66996. Up to 1307 conditions per place. [2020-10-16 00:14:31,182 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 86 selfloop transitions, 718 changer transitions 0/811 dead transitions. [2020-10-16 00:14:31,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1194 places, 811 transitions, 54125 flow [2020-10-16 00:14:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-16 00:14:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 00:14:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3443 transitions. [2020-10-16 00:14:31,186 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6750980392156862 [2020-10-16 00:14:31,186 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3443 transitions. [2020-10-16 00:14:31,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3443 transitions. [2020-10-16 00:14:31,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:14:31,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3443 transitions. [2020-10-16 00:14:31,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 52 states. [2020-10-16 00:14:31,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 52 states. [2020-10-16 00:14:31,191 INFO L81 ComplementDD]: Finished complementDD. Result 52 states. [2020-10-16 00:14:31,191 INFO L185 Difference]: Start difference. First operand has 1144 places, 762 transitions, 46301 flow. Second operand 51 states and 3443 transitions. [2020-10-16 00:14:31,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1194 places, 811 transitions, 54125 flow [2020-10-16 00:14:39,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1146 places, 811 transitions, 52477 flow, removed 152 selfloop flow, removed 48 redundant places. [2020-10-16 00:14:39,794 INFO L241 Difference]: Finished difference. Result has 1148 places, 764 transitions, 46593 flow [2020-10-16 00:14:39,795 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=44751, PETRI_DIFFERENCE_MINUEND_PLACES=1096, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=716, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=46593, PETRI_PLACES=1148, PETRI_TRANSITIONS=764} [2020-10-16 00:14:39,795 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1130 predicate places. [2020-10-16 00:14:39,795 INFO L481 AbstractCegarLoop]: Abstraction has has 1148 places, 764 transitions, 46593 flow [2020-10-16 00:14:39,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 00:14:39,795 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:14:39,795 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:14:39,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-16 00:14:39,996 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:14:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:14:39,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1238394390, now seen corresponding path program 186 times [2020-10-16 00:14:39,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:14:39,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341146186] [2020-10-16 00:14:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:14:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:14:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:14:40,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341146186] [2020-10-16 00:14:40,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823935632] [2020-10-16 00:14:40,507 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:14:40,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 00:14:40,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:14:40,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:14:40,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:14:40,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:14:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:14:40,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:14:40,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 00:14:40,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670174750] [2020-10-16 00:14:40,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 00:14:40,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:14:40,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 00:14:40,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-10-16 00:14:40,640 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:14:40,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1148 places, 764 transitions, 46593 flow. Second operand 29 states. [2020-10-16 00:14:40,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:14:40,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:14:40,641 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:14:45,158 INFO L129 PetriNetUnfolder]: 737/2065 cut-off events. [2020-10-16 00:14:45,158 INFO L130 PetriNetUnfolder]: For 1045086/1045088 co-relation queries the response was YES. [2020-10-16 00:14:45,246 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67965 conditions, 2065 events. 737/2065 cut-off events. For 1045086/1045088 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14489 event pairs, 0 based on Foata normal form. 4/2069 useless extension candidates. Maximal degree in co-relation 67451. Up to 1313 conditions per place. [2020-10-16 00:14:45,278 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 76 selfloop transitions, 734 changer transitions 0/817 dead transitions. [2020-10-16 00:14:45,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1200 places, 817 transitions, 54895 flow [2020-10-16 00:14:45,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-16 00:14:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 00:14:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3579 transitions. [2020-10-16 00:14:45,282 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752830188679245 [2020-10-16 00:14:45,282 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3579 transitions. [2020-10-16 00:14:45,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3579 transitions. [2020-10-16 00:14:45,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:14:45,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3579 transitions. [2020-10-16 00:14:45,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 54 states. [2020-10-16 00:14:45,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 54 states. [2020-10-16 00:14:45,286 INFO L81 ComplementDD]: Finished complementDD. Result 54 states. [2020-10-16 00:14:45,286 INFO L185 Difference]: Start difference. First operand has 1148 places, 764 transitions, 46593 flow. Second operand 53 states and 3579 transitions. [2020-10-16 00:14:45,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1200 places, 817 transitions, 54895 flow [2020-10-16 00:14:53,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1152 places, 817 transitions, 53301 flow, removed 153 selfloop flow, removed 48 redundant places. [2020-10-16 00:14:53,872 INFO L241 Difference]: Finished difference. Result has 1155 places, 768 transitions, 47210 flow [2020-10-16 00:14:53,873 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=45103, PETRI_DIFFERENCE_MINUEND_PLACES=1100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=730, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=47210, PETRI_PLACES=1155, PETRI_TRANSITIONS=768} [2020-10-16 00:14:53,873 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1137 predicate places. [2020-10-16 00:14:53,873 INFO L481 AbstractCegarLoop]: Abstraction has has 1155 places, 768 transitions, 47210 flow [2020-10-16 00:14:53,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 00:14:53,873 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:14:53,873 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:14:54,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:14:54,074 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:14:54,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:14:54,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1262879060, now seen corresponding path program 187 times [2020-10-16 00:14:54,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:14:54,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897742266] [2020-10-16 00:14:54,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:14:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:14:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:14:54,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897742266] [2020-10-16 00:14:54,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720166536] [2020-10-16 00:14:54,547 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:14:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:14:54,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 00:14:54,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:14:54,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:14:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:14:54,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:14:54,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 00:14:54,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973401979] [2020-10-16 00:14:54,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 00:14:54,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:14:54,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 00:14:54,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-16 00:14:54,677 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:14:54,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1155 places, 768 transitions, 47210 flow. Second operand 29 states. [2020-10-16 00:14:54,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:14:54,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:14:54,678 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2020-10-16 00:14:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 00:14:57,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-16 00:14:57,447 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 00:14:57,451 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 00:14:57,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 12:14:57 BasicIcfg [2020-10-16 00:14:57,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 00:14:57,453 INFO L168 Benchmark]: Toolchain (without parser) took 847558.50 ms. Allocated memory was 251.7 MB in the beginning and 4.0 GB in the end (delta: 3.8 GB). Free memory was 203.9 MB in the beginning and 1.2 GB in the end (delta: -968.5 MB). Peak memory consumption was 2.8 GB. Max. memory is 14.2 GB. [2020-10-16 00:14:57,453 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 251.7 MB. Free memory is still 225.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 00:14:57,453 INFO L168 Benchmark]: CACSL2BoogieTranslator took 860.40 ms. Allocated memory was 251.7 MB in the beginning and 316.7 MB in the end (delta: 65.0 MB). Free memory was 203.9 MB in the beginning and 272.1 MB in the end (delta: -68.2 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.2 GB. [2020-10-16 00:14:57,454 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.09 ms. Allocated memory is still 316.7 MB. Free memory is still 272.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 00:14:57,454 INFO L168 Benchmark]: Boogie Preprocessor took 35.27 ms. Allocated memory is still 316.7 MB. Free memory was 272.1 MB in the beginning and 269.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 00:14:57,454 INFO L168 Benchmark]: RCFGBuilder took 486.90 ms. Allocated memory is still 316.7 MB. Free memory was 269.6 MB in the beginning and 247.6 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 14.2 GB. [2020-10-16 00:14:57,454 INFO L168 Benchmark]: TraceAbstraction took 846111.29 ms. Allocated memory was 316.7 MB in the beginning and 4.0 GB in the end (delta: 3.7 GB). Free memory was 247.6 MB in the beginning and 1.2 GB in the end (delta: -924.7 MB). Peak memory consumption was 2.8 GB. Max. memory is 14.2 GB. [2020-10-16 00:14:57,456 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 251.7 MB. Free memory is still 225.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 860.40 ms. Allocated memory was 251.7 MB in the beginning and 316.7 MB in the end (delta: 65.0 MB). Free memory was 203.9 MB in the beginning and 272.1 MB in the end (delta: -68.2 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 57.09 ms. Allocated memory is still 316.7 MB. Free memory is still 272.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 35.27 ms. Allocated memory is still 316.7 MB. Free memory was 272.1 MB in the beginning and 269.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 486.90 ms. Allocated memory is still 316.7 MB. Free memory was 269.6 MB in the beginning and 247.6 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 14.2 GB. * TraceAbstraction took 846111.29 ms. Allocated memory was 316.7 MB in the beginning and 4.0 GB in the end (delta: 3.7 GB). Free memory was 247.6 MB in the beginning and 1.2 GB in the end (delta: -924.7 MB). Peak memory consumption was 2.8 GB. 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: 1.5s, 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 - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 68 known predicates. - 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: TIMEOUT, OverallTime: 845.9s, OverallIterations: 189, TraceHistogramMax: 12, AutomataDifference: 741.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 401 SDtfs, 5901 SDslu, 750 SDs, 0 SdLazy, 23540 SolverSat, 15966 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12569 GetRequests, 4009 SyntacticMatches, 184 SemanticMatches, 8375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107283 ImplicationChecksByTransitivity, 176.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47210occurred in iteration=188, 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: 1.4s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 53.1s InterpolantComputationTime, 9008 NumberOfCodeBlocks, 9008 NumberOfCodeBlocksAsserted, 1112 NumberOfCheckSat, 8635 ConstructedInterpolants, 0 QuantifiedInterpolants, 967095 SizeOfPredicates, 3010 NumberOfNonLiveVariables, 26826 ConjunctsInSsa, 3753 ConjunctsInUnsatCore, 373 InterpolantComputations, 5 PerfectInterpolantSequences, 0/24974 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 could not prove your program: Timeout Completed graceful shutdown