/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 03:24:55,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 03:24:55,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 03:24:55,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 03:24:55,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 03:24:55,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 03:24:55,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 03:24:55,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 03:24:55,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 03:24:55,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 03:24:55,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 03:24:55,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 03:24:55,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 03:24:55,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 03:24:55,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 03:24:55,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 03:24:55,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 03:24:55,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 03:24:55,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 03:24:55,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 03:24:55,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 03:24:55,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 03:24:55,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 03:24:55,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 03:24:55,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 03:24:55,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 03:24:55,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 03:24:55,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 03:24:55,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 03:24:55,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 03:24:55,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 03:24:55,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 03:24:55,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 03:24:55,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 03:24:55,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 03:24:55,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 03:24:55,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 03:24:55,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 03:24:55,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 03:24:55,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 03:24:55,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 03:24:55,837 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf [2020-10-16 03:24:55,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 03:24:55,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 03:24:55,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 03:24:55,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 03:24:55,866 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 03:24:55,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 03:24:55,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 03:24:55,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 03:24:55,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 03:24:55,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 03:24:55,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 03:24:55,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 03:24:55,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 03:24:55,868 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 03:24:55,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 03:24:55,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 03:24:55,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 03:24:55,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 03:24:55,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 03:24:55,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 03:24:55,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 03:24:55,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 03:24:55,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 03:24:55,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 03:24:55,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 03:24:55,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 03:24:55,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 03:24:55,871 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 03:24:55,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 03:24:56,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 03:24:56,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 03:24:56,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 03:24:56,308 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 03:24:56,308 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 03:24:56,309 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-16 03:24:56,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9cfa2625/871e1c574ddc49838d61e425aaa84766/FLAG3942a9c64 [2020-10-16 03:24:57,048 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 03:24:57,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-16 03:24:57,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9cfa2625/871e1c574ddc49838d61e425aaa84766/FLAG3942a9c64 [2020-10-16 03:24:57,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9cfa2625/871e1c574ddc49838d61e425aaa84766 [2020-10-16 03:24:57,347 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 03:24:57,349 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 03:24:57,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 03:24:57,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 03:24:57,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 03:24:57,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:24:57" (1/1) ... [2020-10-16 03:24:57,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76db5583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:57, skipping insertion in model container [2020-10-16 03:24:57,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:24:57" (1/1) ... [2020-10-16 03:24:57,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 03:24:57,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 03:24:58,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 03:24:58,082 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 03:24:58,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 03:24:58,280 INFO L208 MainTranslator]: Completed translation [2020-10-16 03:24:58,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58 WrapperNode [2020-10-16 03:24:58,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 03:24:58,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 03:24:58,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 03:24:58,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 03:24:58,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58" (1/1) ... [2020-10-16 03:24:58,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58" (1/1) ... [2020-10-16 03:24:58,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 03:24:58,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 03:24:58,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 03:24:58,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 03:24:58,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58" (1/1) ... [2020-10-16 03:24:58,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58" (1/1) ... [2020-10-16 03:24:58,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58" (1/1) ... [2020-10-16 03:24:58,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58" (1/1) ... [2020-10-16 03:24:58,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58" (1/1) ... [2020-10-16 03:24:58,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58" (1/1) ... [2020-10-16 03:24:58,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58" (1/1) ... [2020-10-16 03:24:58,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 03:24:58,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 03:24:58,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 03:24:58,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 03:24:58,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 03:24:58,438 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 03:24:58,438 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 03:24:58,439 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 03:24:58,439 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 03:24:58,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 03:24:58,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 03:24:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 03:24:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 03:24:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 03:24:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 03:24:58,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 03:24:58,442 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 03:24:58,839 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 03:24:58,840 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 03:24:58,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:24:58 BoogieIcfgContainer [2020-10-16 03:24:58,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 03:24:58,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 03:24:58,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 03:24:58,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 03:24:58,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:24:57" (1/3) ... [2020-10-16 03:24:58,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e2fe93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:24:58, skipping insertion in model container [2020-10-16 03:24:58,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:58" (2/3) ... [2020-10-16 03:24:58,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e2fe93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:24:58, skipping insertion in model container [2020-10-16 03:24:58,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:24:58" (3/3) ... [2020-10-16 03:24:58,853 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-10-16 03:24:58,865 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 03:24:58,873 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 03:24:58,874 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 03:24:58,903 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,903 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,905 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,905 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,907 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,908 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,908 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,908 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,910 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,910 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,911 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,915 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,915 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,915 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,916 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,916 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,916 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,923 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,923 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,923 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,924 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,924 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,924 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:58,944 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 03:24:58,969 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 03:24:58,970 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 03:24:58,970 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 03:24:58,971 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 03:24:58,971 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 03:24:58,971 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 03:24:58,971 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 03:24:58,972 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 03:24:58,984 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 03:24:59,025 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 03:24:59,026 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:24:59,033 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 03:24:59,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 03:24:59,039 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 112 flow [2020-10-16 03:24:59,042 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 03:24:59,045 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions, 112 flow [2020-10-16 03:24:59,048 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 53 transitions, 112 flow [2020-10-16 03:24:59,048 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 112 flow [2020-10-16 03:24:59,066 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 03:24:59,066 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:24:59,067 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 03:24:59,070 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 03:25:00,312 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 03:25:00,550 INFO L132 LiptonReduction]: Checked pairs total: 881 [2020-10-16 03:25:00,551 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 03:25:00,554 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1514 [2020-10-16 03:25:00,582 INFO L129 PetriNetUnfolder]: 2/12 cut-off events. [2020-10-16 03:25:00,583 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:25:00,583 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:00,584 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 03:25:00,585 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:00,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 03:25:00,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:00,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137073336] [2020-10-16 03:25:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:00,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137073336] [2020-10-16 03:25:00,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:25:00,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 03:25:00,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328106515] [2020-10-16 03:25:00,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 03:25:00,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:00,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 03:25:00,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 03:25:00,904 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:00,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 32 flow. Second operand 4 states. [2020-10-16 03:25:00,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:00,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:00,911 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:00,997 INFO L129 PetriNetUnfolder]: 29/61 cut-off events. [2020-10-16 03:25:00,997 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:25:00,998 INFO L80 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 61 events. 29/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 148 event pairs, 4 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 106. Up to 28 conditions per place. [2020-10-16 03:25:01,000 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 7 selfloop transitions, 5 changer transitions 3/22 dead transitions. [2020-10-16 03:25:01,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 80 flow [2020-10-16 03:25:01,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 03:25:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 03:25:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2020-10-16 03:25:01,020 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.684 [2020-10-16 03:25:01,021 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 342 transitions. [2020-10-16 03:25:01,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 342 transitions. [2020-10-16 03:25:01,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:01,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 342 transitions. [2020-10-16 03:25:01,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 03:25:01,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 03:25:01,042 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 03:25:01,044 INFO L185 Difference]: Start difference. First operand has 18 places, 13 transitions, 32 flow. Second operand 5 states and 342 transitions. [2020-10-16 03:25:01,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 80 flow [2020-10-16 03:25:01,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 22 transitions, 78 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 03:25:01,052 INFO L241 Difference]: Finished difference. Result has 23 places, 16 transitions, 65 flow [2020-10-16 03:25:01,056 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=65, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2020-10-16 03:25:01,057 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2020-10-16 03:25:01,058 INFO L481 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 65 flow [2020-10-16 03:25:01,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 03:25:01,058 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:01,058 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:01,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 03:25:01,059 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:01,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:01,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2130400634, now seen corresponding path program 1 times [2020-10-16 03:25:01,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:01,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159707202] [2020-10-16 03:25:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:01,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159707202] [2020-10-16 03:25:01,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:25:01,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 03:25:01,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109376911] [2020-10-16 03:25:01,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 03:25:01,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:01,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 03:25:01,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 03:25:01,202 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:01,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 65 flow. Second operand 5 states. [2020-10-16 03:25:01,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:01,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:01,203 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:01,251 INFO L129 PetriNetUnfolder]: 17/42 cut-off events. [2020-10-16 03:25:01,252 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2020-10-16 03:25:01,253 INFO L80 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 42 events. 17/42 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 112. Up to 21 conditions per place. [2020-10-16 03:25:01,254 INFO L132 encePairwiseOnDemand]: 96/100 looper letters, 12 selfloop transitions, 6 changer transitions 0/25 dead transitions. [2020-10-16 03:25:01,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 25 transitions, 147 flow [2020-10-16 03:25:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 03:25:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 03:25:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 271 transitions. [2020-10-16 03:25:01,257 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6775 [2020-10-16 03:25:01,258 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 271 transitions. [2020-10-16 03:25:01,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 271 transitions. [2020-10-16 03:25:01,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:01,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 271 transitions. [2020-10-16 03:25:01,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 03:25:01,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 03:25:01,262 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 03:25:01,262 INFO L185 Difference]: Start difference. First operand has 23 places, 16 transitions, 65 flow. Second operand 4 states and 271 transitions. [2020-10-16 03:25:01,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 25 transitions, 147 flow [2020-10-16 03:25:01,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 03:25:01,265 INFO L241 Difference]: Finished difference. Result has 26 places, 21 transitions, 114 flow [2020-10-16 03:25:01,266 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2020-10-16 03:25:01,266 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 8 predicate places. [2020-10-16 03:25:01,267 INFO L481 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 114 flow [2020-10-16 03:25:01,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 03:25:01,267 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:01,267 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:01,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 03:25:01,268 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:01,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:01,268 INFO L82 PathProgramCache]: Analyzing trace with hash 993324059, now seen corresponding path program 1 times [2020-10-16 03:25:01,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:01,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682007541] [2020-10-16 03:25:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:01,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682007541] [2020-10-16 03:25:01,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:25:01,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 03:25:01,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986147853] [2020-10-16 03:25:01,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 03:25:01,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:01,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 03:25:01,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 03:25:01,389 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:01,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 114 flow. Second operand 6 states. [2020-10-16 03:25:01,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:01,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:01,390 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:01,492 INFO L129 PetriNetUnfolder]: 28/67 cut-off events. [2020-10-16 03:25:01,493 INFO L130 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2020-10-16 03:25:01,494 INFO L80 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 67 events. 28/67 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 157 event pairs, 0 based on Foata normal form. 2/68 useless extension candidates. Maximal degree in co-relation 217. Up to 23 conditions per place. [2020-10-16 03:25:01,495 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 13 selfloop transitions, 17 changer transitions 0/37 dead transitions. [2020-10-16 03:25:01,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 270 flow [2020-10-16 03:25:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 03:25:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 03:25:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 542 transitions. [2020-10-16 03:25:01,499 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6775 [2020-10-16 03:25:01,499 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 542 transitions. [2020-10-16 03:25:01,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 542 transitions. [2020-10-16 03:25:01,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:01,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 542 transitions. [2020-10-16 03:25:01,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 03:25:01,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 03:25:01,505 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 03:25:01,505 INFO L185 Difference]: Start difference. First operand has 26 places, 21 transitions, 114 flow. Second operand 8 states and 542 transitions. [2020-10-16 03:25:01,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 270 flow [2020-10-16 03:25:01,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 268 flow, removed 1 selfloop flow, removed 0 redundant places. [2020-10-16 03:25:01,510 INFO L241 Difference]: Finished difference. Result has 37 places, 31 transitions, 245 flow [2020-10-16 03:25:01,511 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2020-10-16 03:25:01,511 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 19 predicate places. [2020-10-16 03:25:01,511 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 245 flow [2020-10-16 03:25:01,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 03:25:01,512 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:01,512 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:01,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 03:25:01,512 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:01,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1383900809, now seen corresponding path program 2 times [2020-10-16 03:25:01,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:01,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698968797] [2020-10-16 03:25:01,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:01,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698968797] [2020-10-16 03:25:01,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:25:01,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 03:25:01,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451310899] [2020-10-16 03:25:01,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 03:25:01,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:01,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 03:25:01,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 03:25:01,625 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:01,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 245 flow. Second operand 6 states. [2020-10-16 03:25:01,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:01,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:01,626 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:01,739 INFO L129 PetriNetUnfolder]: 25/61 cut-off events. [2020-10-16 03:25:01,740 INFO L130 PetriNetUnfolder]: For 207/213 co-relation queries the response was YES. [2020-10-16 03:25:01,741 INFO L80 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 61 events. 25/61 cut-off events. For 207/213 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 149 event pairs, 0 based on Foata normal form. 4/64 useless extension candidates. Maximal degree in co-relation 276. Up to 23 conditions per place. [2020-10-16 03:25:01,742 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 12 selfloop transitions, 18 changer transitions 0/37 dead transitions. [2020-10-16 03:25:01,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 371 flow [2020-10-16 03:25:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 03:25:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 03:25:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2020-10-16 03:25:01,746 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6771428571428572 [2020-10-16 03:25:01,746 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2020-10-16 03:25:01,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2020-10-16 03:25:01,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:01,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2020-10-16 03:25:01,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 03:25:01,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 03:25:01,752 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 03:25:01,752 INFO L185 Difference]: Start difference. First operand has 37 places, 31 transitions, 245 flow. Second operand 7 states and 474 transitions. [2020-10-16 03:25:01,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 371 flow [2020-10-16 03:25:01,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 338 flow, removed 9 selfloop flow, removed 3 redundant places. [2020-10-16 03:25:01,760 INFO L241 Difference]: Finished difference. Result has 42 places, 32 transitions, 280 flow [2020-10-16 03:25:01,761 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=280, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2020-10-16 03:25:01,761 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 24 predicate places. [2020-10-16 03:25:01,761 INFO L481 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 280 flow [2020-10-16 03:25:01,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 03:25:01,762 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:01,762 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:01,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 03:25:01,762 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:01,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:01,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1013031689, now seen corresponding path program 3 times [2020-10-16 03:25:01,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:01,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092013046] [2020-10-16 03:25:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:01,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092013046] [2020-10-16 03:25:01,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:25:01,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 03:25:01,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277104689] [2020-10-16 03:25:01,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 03:25:01,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:01,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 03:25:01,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 03:25:01,854 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:01,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 280 flow. Second operand 6 states. [2020-10-16 03:25:01,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:01,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:01,855 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:01,995 INFO L129 PetriNetUnfolder]: 30/73 cut-off events. [2020-10-16 03:25:01,995 INFO L130 PetriNetUnfolder]: For 319/325 co-relation queries the response was YES. [2020-10-16 03:25:01,998 INFO L80 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 73 events. 30/73 cut-off events. For 319/325 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 207 event pairs, 0 based on Foata normal form. 2/75 useless extension candidates. Maximal degree in co-relation 357. Up to 34 conditions per place. [2020-10-16 03:25:02,001 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 21 selfloop transitions, 16 changer transitions 0/44 dead transitions. [2020-10-16 03:25:02,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 484 flow [2020-10-16 03:25:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 03:25:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 03:25:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2020-10-16 03:25:02,006 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6771428571428572 [2020-10-16 03:25:02,007 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2020-10-16 03:25:02,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2020-10-16 03:25:02,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:02,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2020-10-16 03:25:02,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 03:25:02,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 03:25:02,011 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 03:25:02,011 INFO L185 Difference]: Start difference. First operand has 42 places, 32 transitions, 280 flow. Second operand 7 states and 474 transitions. [2020-10-16 03:25:02,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 484 flow [2020-10-16 03:25:02,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 434 flow, removed 8 selfloop flow, removed 5 redundant places. [2020-10-16 03:25:02,020 INFO L241 Difference]: Finished difference. Result has 46 places, 39 transitions, 370 flow [2020-10-16 03:25:02,020 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2020-10-16 03:25:02,020 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 28 predicate places. [2020-10-16 03:25:02,021 INFO L481 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 370 flow [2020-10-16 03:25:02,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 03:25:02,021 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:02,021 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:02,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 03:25:02,022 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:02,023 INFO L82 PathProgramCache]: Analyzing trace with hash 728810004, now seen corresponding path program 4 times [2020-10-16 03:25:02,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:02,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525629250] [2020-10-16 03:25:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:02,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525629250] [2020-10-16 03:25:02,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422065699] [2020-10-16 03:25:02,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:02,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:25:02,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 03:25:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:02,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:25:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:02,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:02,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 03:25:02,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681729111] [2020-10-16 03:25:02,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:25:02,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:02,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:25:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:25:02,289 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:02,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 370 flow. Second operand 8 states. [2020-10-16 03:25:02,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:02,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:02,290 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:02,434 INFO L129 PetriNetUnfolder]: 33/80 cut-off events. [2020-10-16 03:25:02,434 INFO L130 PetriNetUnfolder]: For 371/376 co-relation queries the response was YES. [2020-10-16 03:25:02,436 INFO L80 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 80 events. 33/80 cut-off events. For 371/376 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 232 event pairs, 0 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 411. Up to 33 conditions per place. [2020-10-16 03:25:02,438 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 13 selfloop transitions, 28 changer transitions 0/48 dead transitions. [2020-10-16 03:25:02,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 566 flow [2020-10-16 03:25:02,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 03:25:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 03:25:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 541 transitions. [2020-10-16 03:25:02,442 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67625 [2020-10-16 03:25:02,442 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 541 transitions. [2020-10-16 03:25:02,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 541 transitions. [2020-10-16 03:25:02,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:02,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 541 transitions. [2020-10-16 03:25:02,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 03:25:02,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 03:25:02,448 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 03:25:02,448 INFO L185 Difference]: Start difference. First operand has 46 places, 39 transitions, 370 flow. Second operand 8 states and 541 transitions. [2020-10-16 03:25:02,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 566 flow [2020-10-16 03:25:02,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 548 flow, removed 5 selfloop flow, removed 1 redundant places. [2020-10-16 03:25:02,456 INFO L241 Difference]: Finished difference. Result has 54 places, 42 transitions, 474 flow [2020-10-16 03:25:02,456 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=474, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2020-10-16 03:25:02,457 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 36 predicate places. [2020-10-16 03:25:02,457 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 474 flow [2020-10-16 03:25:02,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:25:02,457 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:02,458 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:02,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 03:25:02,673 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:02,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:02,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1735406889, now seen corresponding path program 5 times [2020-10-16 03:25:02,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:02,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455630119] [2020-10-16 03:25:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:02,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455630119] [2020-10-16 03:25:02,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692810563] [2020-10-16 03:25:02,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:02,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:02,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:02,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 03:25:02,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:02,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:02,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 03:25:02,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550523525] [2020-10-16 03:25:02,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 03:25:02,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 03:25:02,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 03:25:02,848 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:02,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 474 flow. Second operand 7 states. [2020-10-16 03:25:02,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:02,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:02,849 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:02,943 INFO L129 PetriNetUnfolder]: 35/85 cut-off events. [2020-10-16 03:25:02,944 INFO L130 PetriNetUnfolder]: For 593/602 co-relation queries the response was YES. [2020-10-16 03:25:02,945 INFO L80 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 85 events. 35/85 cut-off events. For 593/602 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 245 event pairs, 0 based on Foata normal form. 11/96 useless extension candidates. Maximal degree in co-relation 490. Up to 44 conditions per place. [2020-10-16 03:25:02,946 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 28 selfloop transitions, 15 changer transitions 0/50 dead transitions. [2020-10-16 03:25:02,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 674 flow [2020-10-16 03:25:02,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 03:25:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 03:25:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 540 transitions. [2020-10-16 03:25:02,949 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:25:02,950 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 540 transitions. [2020-10-16 03:25:02,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 540 transitions. [2020-10-16 03:25:02,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:02,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 540 transitions. [2020-10-16 03:25:02,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 03:25:02,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 03:25:02,954 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 03:25:02,954 INFO L185 Difference]: Start difference. First operand has 54 places, 42 transitions, 474 flow. Second operand 8 states and 540 transitions. [2020-10-16 03:25:02,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 674 flow [2020-10-16 03:25:02,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 622 flow, removed 8 selfloop flow, removed 5 redundant places. [2020-10-16 03:25:02,962 INFO L241 Difference]: Finished difference. Result has 59 places, 45 transitions, 509 flow [2020-10-16 03:25:02,962 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=509, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2020-10-16 03:25:02,962 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 41 predicate places. [2020-10-16 03:25:02,962 INFO L481 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 509 flow [2020-10-16 03:25:02,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 03:25:02,963 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:02,963 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:03,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:03,179 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:03,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:03,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1339228555, now seen corresponding path program 6 times [2020-10-16 03:25:03,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:03,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445554271] [2020-10-16 03:25:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:03,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445554271] [2020-10-16 03:25:03,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912587124] [2020-10-16 03:25:03,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:03,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 03:25:03,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:03,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:25:03,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:03,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:03,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 03:25:03,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070299845] [2020-10-16 03:25:03,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:25:03,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:03,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:25:03,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:25:03,318 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:03,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 509 flow. Second operand 8 states. [2020-10-16 03:25:03,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:03,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:03,319 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:03,551 INFO L129 PetriNetUnfolder]: 39/95 cut-off events. [2020-10-16 03:25:03,552 INFO L130 PetriNetUnfolder]: For 807/809 co-relation queries the response was YES. [2020-10-16 03:25:03,553 INFO L80 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 95 events. 39/95 cut-off events. For 807/809 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 296 event pairs, 0 based on Foata normal form. 4/99 useless extension candidates. Maximal degree in co-relation 579. Up to 43 conditions per place. [2020-10-16 03:25:03,555 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 25 selfloop transitions, 24 changer transitions 0/56 dead transitions. [2020-10-16 03:25:03,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 789 flow [2020-10-16 03:25:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 03:25:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-16 03:25:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 744 transitions. [2020-10-16 03:25:03,559 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6763636363636364 [2020-10-16 03:25:03,559 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 744 transitions. [2020-10-16 03:25:03,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 744 transitions. [2020-10-16 03:25:03,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:03,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 744 transitions. [2020-10-16 03:25:03,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-16 03:25:03,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-16 03:25:03,565 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-16 03:25:03,565 INFO L185 Difference]: Start difference. First operand has 59 places, 45 transitions, 509 flow. Second operand 11 states and 744 transitions. [2020-10-16 03:25:03,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 789 flow [2020-10-16 03:25:03,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 56 transitions, 722 flow, removed 25 selfloop flow, removed 3 redundant places. [2020-10-16 03:25:03,573 INFO L241 Difference]: Finished difference. Result has 69 places, 49 transitions, 594 flow [2020-10-16 03:25:03,574 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=594, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2020-10-16 03:25:03,574 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 51 predicate places. [2020-10-16 03:25:03,575 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 594 flow [2020-10-16 03:25:03,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:25:03,575 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:03,575 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:03,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:03,789 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:03,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:03,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1051578980, now seen corresponding path program 7 times [2020-10-16 03:25:03,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:03,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223913308] [2020-10-16 03:25:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:03,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223913308] [2020-10-16 03:25:03,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448967563] [2020-10-16 03:25:03,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:03,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:25:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:03,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:03,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 03:25:03,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973058896] [2020-10-16 03:25:03,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:25:03,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:25:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:25:03,962 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:03,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 594 flow. Second operand 8 states. [2020-10-16 03:25:03,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:03,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:03,963 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:04,113 INFO L129 PetriNetUnfolder]: 41/102 cut-off events. [2020-10-16 03:25:04,113 INFO L130 PetriNetUnfolder]: For 952/961 co-relation queries the response was YES. [2020-10-16 03:25:04,114 INFO L80 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 102 events. 41/102 cut-off events. For 952/961 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 329 event pairs, 0 based on Foata normal form. 7/109 useless extension candidates. Maximal degree in co-relation 656. Up to 47 conditions per place. [2020-10-16 03:25:04,117 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 25 selfloop transitions, 26 changer transitions 0/58 dead transitions. [2020-10-16 03:25:04,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 58 transitions, 858 flow [2020-10-16 03:25:04,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 03:25:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-16 03:25:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 675 transitions. [2020-10-16 03:25:04,122 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:25:04,122 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 675 transitions. [2020-10-16 03:25:04,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 675 transitions. [2020-10-16 03:25:04,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:04,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 675 transitions. [2020-10-16 03:25:04,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-16 03:25:04,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-16 03:25:04,128 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-16 03:25:04,128 INFO L185 Difference]: Start difference. First operand has 69 places, 49 transitions, 594 flow. Second operand 10 states and 675 transitions. [2020-10-16 03:25:04,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 58 transitions, 858 flow [2020-10-16 03:25:04,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 58 transitions, 785 flow, removed 22 selfloop flow, removed 5 redundant places. [2020-10-16 03:25:04,137 INFO L241 Difference]: Finished difference. Result has 75 places, 51 transitions, 632 flow [2020-10-16 03:25:04,138 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=632, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2020-10-16 03:25:04,138 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 57 predicate places. [2020-10-16 03:25:04,138 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 632 flow [2020-10-16 03:25:04,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:25:04,138 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:04,138 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:04,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:04,354 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:04,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:04,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1117784062, now seen corresponding path program 8 times [2020-10-16 03:25:04,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:04,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518010467] [2020-10-16 03:25:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:04,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518010467] [2020-10-16 03:25:04,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438766721] [2020-10-16 03:25:04,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:04,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:04,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:04,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:25:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:04,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:04,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:04,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 03:25:04,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93264056] [2020-10-16 03:25:04,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:25:04,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:04,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:25:04,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:25:04,581 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:04,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 632 flow. Second operand 9 states. [2020-10-16 03:25:04,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:04,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:04,582 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:04,784 INFO L129 PetriNetUnfolder]: 45/114 cut-off events. [2020-10-16 03:25:04,784 INFO L130 PetriNetUnfolder]: For 1113/1115 co-relation queries the response was YES. [2020-10-16 03:25:04,786 INFO L80 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 114 events. 45/114 cut-off events. For 1113/1115 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 396 event pairs, 0 based on Foata normal form. 4/118 useless extension candidates. Maximal degree in co-relation 756. Up to 55 conditions per place. [2020-10-16 03:25:04,789 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 23 selfloop transitions, 32 changer transitions 0/62 dead transitions. [2020-10-16 03:25:04,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 62 transitions, 936 flow [2020-10-16 03:25:04,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 03:25:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-16 03:25:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 743 transitions. [2020-10-16 03:25:04,794 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754545454545454 [2020-10-16 03:25:04,794 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 743 transitions. [2020-10-16 03:25:04,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 743 transitions. [2020-10-16 03:25:04,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:04,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 743 transitions. [2020-10-16 03:25:04,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-16 03:25:04,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-16 03:25:04,801 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-16 03:25:04,802 INFO L185 Difference]: Start difference. First operand has 75 places, 51 transitions, 632 flow. Second operand 11 states and 743 transitions. [2020-10-16 03:25:04,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 62 transitions, 936 flow [2020-10-16 03:25:04,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 62 transitions, 857 flow, removed 18 selfloop flow, removed 7 redundant places. [2020-10-16 03:25:04,813 INFO L241 Difference]: Finished difference. Result has 80 places, 55 transitions, 714 flow [2020-10-16 03:25:04,814 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=714, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2020-10-16 03:25:04,814 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 62 predicate places. [2020-10-16 03:25:04,815 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 714 flow [2020-10-16 03:25:04,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:25:04,815 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:04,815 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:05,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 03:25:05,029 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1510678266, now seen corresponding path program 9 times [2020-10-16 03:25:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:05,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827525431] [2020-10-16 03:25:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:05,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827525431] [2020-10-16 03:25:05,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273804002] [2020-10-16 03:25:05,083 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:05,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 03:25:05,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:05,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 03:25:05,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:05,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:05,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 03:25:05,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360640372] [2020-10-16 03:25:05,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:25:05,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:05,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:25:05,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:25:05,174 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:05,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 714 flow. Second operand 8 states. [2020-10-16 03:25:05,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:05,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:05,174 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:05,371 INFO L129 PetriNetUnfolder]: 56/139 cut-off events. [2020-10-16 03:25:05,371 INFO L130 PetriNetUnfolder]: For 1641/1643 co-relation queries the response was YES. [2020-10-16 03:25:05,372 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 139 events. 56/139 cut-off events. For 1641/1643 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 496 event pairs, 0 based on Foata normal form. 2/141 useless extension candidates. Maximal degree in co-relation 998. Up to 73 conditions per place. [2020-10-16 03:25:05,375 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 19 selfloop transitions, 47 changer transitions 0/73 dead transitions. [2020-10-16 03:25:05,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 73 transitions, 1192 flow [2020-10-16 03:25:05,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:25:05,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:25:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 812 transitions. [2020-10-16 03:25:05,379 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6766666666666666 [2020-10-16 03:25:05,379 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 812 transitions. [2020-10-16 03:25:05,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 812 transitions. [2020-10-16 03:25:05,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:05,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 812 transitions. [2020-10-16 03:25:05,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:25:05,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:25:05,385 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:25:05,385 INFO L185 Difference]: Start difference. First operand has 80 places, 55 transitions, 714 flow. Second operand 12 states and 812 transitions. [2020-10-16 03:25:05,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 73 transitions, 1192 flow [2020-10-16 03:25:05,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 73 transitions, 1061 flow, removed 38 selfloop flow, removed 9 redundant places. [2020-10-16 03:25:05,402 INFO L241 Difference]: Finished difference. Result has 86 places, 63 transitions, 894 flow [2020-10-16 03:25:05,403 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=894, PETRI_PLACES=86, PETRI_TRANSITIONS=63} [2020-10-16 03:25:05,403 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 68 predicate places. [2020-10-16 03:25:05,403 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 63 transitions, 894 flow [2020-10-16 03:25:05,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:25:05,403 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:05,403 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:05,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:05,617 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:05,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1118290912, now seen corresponding path program 10 times [2020-10-16 03:25:05,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:05,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827653923] [2020-10-16 03:25:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:05,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827653923] [2020-10-16 03:25:05,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895527724] [2020-10-16 03:25:05,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:05,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:25:05,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:05,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:25:05,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:05,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:05,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:05,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 03:25:05,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123564722] [2020-10-16 03:25:05,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:25:05,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:25:05,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:25:05,799 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:05,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 63 transitions, 894 flow. Second operand 9 states. [2020-10-16 03:25:05,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:05,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:05,805 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:06,098 INFO L129 PetriNetUnfolder]: 53/133 cut-off events. [2020-10-16 03:25:06,099 INFO L130 PetriNetUnfolder]: For 1900/1906 co-relation queries the response was YES. [2020-10-16 03:25:06,100 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 133 events. 53/133 cut-off events. For 1900/1906 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 490 event pairs, 0 based on Foata normal form. 8/141 useless extension candidates. Maximal degree in co-relation 1022. Up to 69 conditions per place. [2020-10-16 03:25:06,104 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 16 selfloop transitions, 50 changer transitions 0/73 dead transitions. [2020-10-16 03:25:06,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 73 transitions, 1256 flow [2020-10-16 03:25:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 03:25:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 03:25:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 879 transitions. [2020-10-16 03:25:06,109 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6761538461538461 [2020-10-16 03:25:06,109 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 879 transitions. [2020-10-16 03:25:06,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 879 transitions. [2020-10-16 03:25:06,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:06,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 879 transitions. [2020-10-16 03:25:06,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 03:25:06,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 03:25:06,117 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 03:25:06,117 INFO L185 Difference]: Start difference. First operand has 86 places, 63 transitions, 894 flow. Second operand 13 states and 879 transitions. [2020-10-16 03:25:06,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 73 transitions, 1256 flow [2020-10-16 03:25:06,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 73 transitions, 1123 flow, removed 38 selfloop flow, removed 7 redundant places. [2020-10-16 03:25:06,138 INFO L241 Difference]: Finished difference. Result has 93 places, 64 transitions, 922 flow [2020-10-16 03:25:06,138 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=922, PETRI_PLACES=93, PETRI_TRANSITIONS=64} [2020-10-16 03:25:06,138 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 75 predicate places. [2020-10-16 03:25:06,138 INFO L481 AbstractCegarLoop]: Abstraction has has 93 places, 64 transitions, 922 flow [2020-10-16 03:25:06,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:25:06,139 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:06,139 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:06,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:06,354 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:06,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1433571448, now seen corresponding path program 11 times [2020-10-16 03:25:06,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:06,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035810401] [2020-10-16 03:25:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:06,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035810401] [2020-10-16 03:25:06,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281043225] [2020-10-16 03:25:06,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:06,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:06,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:06,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:25:06,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:06,483 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:25:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:06,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:06,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 03:25:06,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858823352] [2020-10-16 03:25:06,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:25:06,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:06,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:25:06,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:25:06,500 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:06,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 64 transitions, 922 flow. Second operand 9 states. [2020-10-16 03:25:06,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:06,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:06,502 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:06,720 INFO L129 PetriNetUnfolder]: 56/139 cut-off events. [2020-10-16 03:25:06,721 INFO L130 PetriNetUnfolder]: For 2179/2181 co-relation queries the response was YES. [2020-10-16 03:25:06,722 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 139 events. 56/139 cut-off events. For 2179/2181 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 517 event pairs, 0 based on Foata normal form. 3/142 useless extension candidates. Maximal degree in co-relation 1093. Up to 69 conditions per place. [2020-10-16 03:25:06,724 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 34 changer transitions 0/76 dead transitions. [2020-10-16 03:25:06,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 76 transitions, 1322 flow [2020-10-16 03:25:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:25:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:25:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 811 transitions. [2020-10-16 03:25:06,728 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 03:25:06,728 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 811 transitions. [2020-10-16 03:25:06,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 811 transitions. [2020-10-16 03:25:06,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:06,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 811 transitions. [2020-10-16 03:25:06,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:25:06,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:25:06,734 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:25:06,734 INFO L185 Difference]: Start difference. First operand has 93 places, 64 transitions, 922 flow. Second operand 12 states and 811 transitions. [2020-10-16 03:25:06,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 76 transitions, 1322 flow [2020-10-16 03:25:06,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 76 transitions, 1162 flow, removed 38 selfloop flow, removed 11 redundant places. [2020-10-16 03:25:06,749 INFO L241 Difference]: Finished difference. Result has 95 places, 67 transitions, 954 flow [2020-10-16 03:25:06,749 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=954, PETRI_PLACES=95, PETRI_TRANSITIONS=67} [2020-10-16 03:25:06,750 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 77 predicate places. [2020-10-16 03:25:06,750 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 954 flow [2020-10-16 03:25:06,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:25:06,750 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:06,750 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:06,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 03:25:06,965 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1246359991, now seen corresponding path program 12 times [2020-10-16 03:25:06,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:06,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192304139] [2020-10-16 03:25:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:07,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192304139] [2020-10-16 03:25:07,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745605974] [2020-10-16 03:25:07,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:07,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 03:25:07,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 03:25:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:07,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:25:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:07,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:07,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 03:25:07,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320300604] [2020-10-16 03:25:07,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 03:25:07,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:07,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 03:25:07,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 03:25:07,128 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:07,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 954 flow. Second operand 10 states. [2020-10-16 03:25:07,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:07,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:07,130 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:07,386 INFO L129 PetriNetUnfolder]: 59/146 cut-off events. [2020-10-16 03:25:07,387 INFO L130 PetriNetUnfolder]: For 1848/1850 co-relation queries the response was YES. [2020-10-16 03:25:07,388 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 146 events. 59/146 cut-off events. For 1848/1850 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 543 event pairs, 0 based on Foata normal form. 1/147 useless extension candidates. Maximal degree in co-relation 1089. Up to 73 conditions per place. [2020-10-16 03:25:07,390 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 19 selfloop transitions, 54 changer transitions 0/80 dead transitions. [2020-10-16 03:25:07,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 80 transitions, 1380 flow [2020-10-16 03:25:07,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:25:07,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:25:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 811 transitions. [2020-10-16 03:25:07,393 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 03:25:07,394 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 811 transitions. [2020-10-16 03:25:07,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 811 transitions. [2020-10-16 03:25:07,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:07,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 811 transitions. [2020-10-16 03:25:07,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:25:07,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:25:07,398 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:25:07,398 INFO L185 Difference]: Start difference. First operand has 95 places, 67 transitions, 954 flow. Second operand 12 states and 811 transitions. [2020-10-16 03:25:07,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 80 transitions, 1380 flow [2020-10-16 03:25:07,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 80 transitions, 1310 flow, removed 11 selfloop flow, removed 9 redundant places. [2020-10-16 03:25:07,414 INFO L241 Difference]: Finished difference. Result has 99 places, 70 transitions, 1090 flow [2020-10-16 03:25:07,414 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1090, PETRI_PLACES=99, PETRI_TRANSITIONS=70} [2020-10-16 03:25:07,415 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 81 predicate places. [2020-10-16 03:25:07,415 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 70 transitions, 1090 flow [2020-10-16 03:25:07,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 03:25:07,415 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:07,415 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:07,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:07,630 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:07,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1053734124, now seen corresponding path program 13 times [2020-10-16 03:25:07,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:07,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538999843] [2020-10-16 03:25:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:07,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538999843] [2020-10-16 03:25:07,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470159894] [2020-10-16 03:25:07,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:07,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 03:25:07,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:07,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:07,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 03:25:07,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090311323] [2020-10-16 03:25:07,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:25:07,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:07,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:25:07,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:25:07,780 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:07,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 70 transitions, 1090 flow. Second operand 9 states. [2020-10-16 03:25:07,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:07,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:07,781 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:07,970 INFO L129 PetriNetUnfolder]: 61/151 cut-off events. [2020-10-16 03:25:07,970 INFO L130 PetriNetUnfolder]: For 2363/2369 co-relation queries the response was YES. [2020-10-16 03:25:07,972 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 151 events. 61/151 cut-off events. For 2363/2369 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 571 event pairs, 0 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 1208. Up to 88 conditions per place. [2020-10-16 03:25:07,976 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 55 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2020-10-16 03:25:07,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 79 transitions, 1454 flow [2020-10-16 03:25:07,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 03:25:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-16 03:25:07,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 674 transitions. [2020-10-16 03:25:07,979 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 03:25:07,980 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 674 transitions. [2020-10-16 03:25:07,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 674 transitions. [2020-10-16 03:25:07,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:07,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 674 transitions. [2020-10-16 03:25:07,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-16 03:25:07,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-16 03:25:07,986 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-16 03:25:07,986 INFO L185 Difference]: Start difference. First operand has 99 places, 70 transitions, 1090 flow. Second operand 10 states and 674 transitions. [2020-10-16 03:25:07,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 79 transitions, 1454 flow [2020-10-16 03:25:08,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 79 transitions, 1330 flow, removed 21 selfloop flow, removed 9 redundant places. [2020-10-16 03:25:08,015 INFO L241 Difference]: Finished difference. Result has 101 places, 72 transitions, 1060 flow [2020-10-16 03:25:08,017 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1060, PETRI_PLACES=101, PETRI_TRANSITIONS=72} [2020-10-16 03:25:08,017 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 83 predicate places. [2020-10-16 03:25:08,017 INFO L481 AbstractCegarLoop]: Abstraction has has 101 places, 72 transitions, 1060 flow [2020-10-16 03:25:08,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:25:08,018 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:08,018 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:08,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 03:25:08,234 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:08,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:08,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1491024660, now seen corresponding path program 14 times [2020-10-16 03:25:08,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:08,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061883936] [2020-10-16 03:25:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:08,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061883936] [2020-10-16 03:25:08,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716781615] [2020-10-16 03:25:08,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:08,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:08,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:25:08,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:08,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:08,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 03:25:08,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301456717] [2020-10-16 03:25:08,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 03:25:08,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:08,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 03:25:08,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 03:25:08,456 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:08,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 72 transitions, 1060 flow. Second operand 10 states. [2020-10-16 03:25:08,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:08,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:08,457 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:08,769 INFO L129 PetriNetUnfolder]: 65/162 cut-off events. [2020-10-16 03:25:08,769 INFO L130 PetriNetUnfolder]: For 2893/2899 co-relation queries the response was YES. [2020-10-16 03:25:08,771 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1357 conditions, 162 events. 65/162 cut-off events. For 2893/2899 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 625 event pairs, 0 based on Foata normal form. 8/170 useless extension candidates. Maximal degree in co-relation 1309. Up to 83 conditions per place. [2020-10-16 03:25:08,774 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 46 changer transitions 0/88 dead transitions. [2020-10-16 03:25:08,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 88 transitions, 1610 flow [2020-10-16 03:25:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 03:25:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-16 03:25:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1014 transitions. [2020-10-16 03:25:08,777 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 03:25:08,777 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1014 transitions. [2020-10-16 03:25:08,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1014 transitions. [2020-10-16 03:25:08,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:08,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1014 transitions. [2020-10-16 03:25:08,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-16 03:25:08,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-16 03:25:08,782 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-16 03:25:08,782 INFO L185 Difference]: Start difference. First operand has 101 places, 72 transitions, 1060 flow. Second operand 15 states and 1014 transitions. [2020-10-16 03:25:08,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 88 transitions, 1610 flow [2020-10-16 03:25:08,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 88 transitions, 1526 flow, removed 27 selfloop flow, removed 7 redundant places. [2020-10-16 03:25:08,802 INFO L241 Difference]: Finished difference. Result has 111 places, 76 transitions, 1211 flow [2020-10-16 03:25:08,802 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1211, PETRI_PLACES=111, PETRI_TRANSITIONS=76} [2020-10-16 03:25:08,802 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 93 predicate places. [2020-10-16 03:25:08,803 INFO L481 AbstractCegarLoop]: Abstraction has has 111 places, 76 transitions, 1211 flow [2020-10-16 03:25:08,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 03:25:08,803 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:08,803 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:09,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 03:25:09,019 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:09,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:09,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1389554911, now seen corresponding path program 15 times [2020-10-16 03:25:09,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:09,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008396750] [2020-10-16 03:25:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:09,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008396750] [2020-10-16 03:25:09,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160940266] [2020-10-16 03:25:09,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:09,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 03:25:09,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:09,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:25:09,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:09,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:09,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 03:25:09,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590271175] [2020-10-16 03:25:09,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 03:25:09,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 03:25:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 03:25:09,190 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:09,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 76 transitions, 1211 flow. Second operand 10 states. [2020-10-16 03:25:09,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:09,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:09,191 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:09,370 INFO L129 PetriNetUnfolder]: 67/167 cut-off events. [2020-10-16 03:25:09,371 INFO L130 PetriNetUnfolder]: For 3566/3568 co-relation queries the response was YES. [2020-10-16 03:25:09,372 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1505 conditions, 167 events. 67/167 cut-off events. For 3566/3568 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 640 event pairs, 0 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 1454. Up to 87 conditions per place. [2020-10-16 03:25:09,375 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 50 selfloop transitions, 30 changer transitions 0/87 dead transitions. [2020-10-16 03:25:09,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 87 transitions, 1677 flow [2020-10-16 03:25:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:25:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:25:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 809 transitions. [2020-10-16 03:25:09,378 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741666666666667 [2020-10-16 03:25:09,378 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 809 transitions. [2020-10-16 03:25:09,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 809 transitions. [2020-10-16 03:25:09,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:09,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 809 transitions. [2020-10-16 03:25:09,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:25:09,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:25:09,381 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:25:09,381 INFO L185 Difference]: Start difference. First operand has 111 places, 76 transitions, 1211 flow. Second operand 12 states and 809 transitions. [2020-10-16 03:25:09,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 87 transitions, 1677 flow [2020-10-16 03:25:09,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 87 transitions, 1536 flow, removed 38 selfloop flow, removed 11 redundant places. [2020-10-16 03:25:09,403 INFO L241 Difference]: Finished difference. Result has 113 places, 78 transitions, 1210 flow [2020-10-16 03:25:09,403 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1210, PETRI_PLACES=113, PETRI_TRANSITIONS=78} [2020-10-16 03:25:09,404 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 95 predicate places. [2020-10-16 03:25:09,404 INFO L481 AbstractCegarLoop]: Abstraction has has 113 places, 78 transitions, 1210 flow [2020-10-16 03:25:09,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 03:25:09,404 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:09,404 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:09,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 03:25:09,618 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:09,619 INFO L82 PathProgramCache]: Analyzing trace with hash -470026489, now seen corresponding path program 16 times [2020-10-16 03:25:09,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:09,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368188147] [2020-10-16 03:25:09,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:09,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368188147] [2020-10-16 03:25:09,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573340937] [2020-10-16 03:25:09,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:09,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:25:09,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:09,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:25:09,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:09,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:09,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:09,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 03:25:09,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442217774] [2020-10-16 03:25:09,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:25:09,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:25:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:25:09,797 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:09,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 78 transitions, 1210 flow. Second operand 11 states. [2020-10-16 03:25:09,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:09,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:09,798 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:10,122 INFO L129 PetriNetUnfolder]: 71/179 cut-off events. [2020-10-16 03:25:10,122 INFO L130 PetriNetUnfolder]: For 4049/4051 co-relation queries the response was YES. [2020-10-16 03:25:10,126 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1621 conditions, 179 events. 71/179 cut-off events. For 4049/4051 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 714 event pairs, 0 based on Foata normal form. 4/183 useless extension candidates. Maximal degree in co-relation 1568. Up to 95 conditions per place. [2020-10-16 03:25:10,132 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 44 selfloop transitions, 40 changer transitions 0/91 dead transitions. [2020-10-16 03:25:10,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 91 transitions, 1722 flow [2020-10-16 03:25:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 03:25:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 03:25:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 877 transitions. [2020-10-16 03:25:10,137 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6746153846153846 [2020-10-16 03:25:10,137 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 877 transitions. [2020-10-16 03:25:10,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 877 transitions. [2020-10-16 03:25:10,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:10,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 877 transitions. [2020-10-16 03:25:10,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 03:25:10,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 03:25:10,145 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 03:25:10,146 INFO L185 Difference]: Start difference. First operand has 113 places, 78 transitions, 1210 flow. Second operand 13 states and 877 transitions. [2020-10-16 03:25:10,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 91 transitions, 1722 flow [2020-10-16 03:25:10,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 91 transitions, 1616 flow, removed 27 selfloop flow, removed 9 redundant places. [2020-10-16 03:25:10,186 INFO L241 Difference]: Finished difference. Result has 118 places, 82 transitions, 1306 flow [2020-10-16 03:25:10,186 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1306, PETRI_PLACES=118, PETRI_TRANSITIONS=82} [2020-10-16 03:25:10,187 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 100 predicate places. [2020-10-16 03:25:10,187 INFO L481 AbstractCegarLoop]: Abstraction has has 118 places, 82 transitions, 1306 flow [2020-10-16 03:25:10,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:25:10,188 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:10,188 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:10,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 03:25:10,402 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:10,403 INFO L82 PathProgramCache]: Analyzing trace with hash 17563211, now seen corresponding path program 17 times [2020-10-16 03:25:10,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:10,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335261764] [2020-10-16 03:25:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:10,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335261764] [2020-10-16 03:25:10,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918956465] [2020-10-16 03:25:10,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:10,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 03:25:10,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:10,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:25:10,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:10,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:10,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:10,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 03:25:10,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42712378] [2020-10-16 03:25:10,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:25:10,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:10,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:25:10,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:25:10,705 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:10,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 82 transitions, 1306 flow. Second operand 11 states. [2020-10-16 03:25:10,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:10,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:10,707 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:11,084 INFO L129 PetriNetUnfolder]: 75/188 cut-off events. [2020-10-16 03:25:11,084 INFO L130 PetriNetUnfolder]: For 4627/4629 co-relation queries the response was YES. [2020-10-16 03:25:11,086 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 188 events. 75/188 cut-off events. For 4627/4629 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 747 event pairs, 0 based on Foata normal form. 4/192 useless extension candidates. Maximal degree in co-relation 1704. Up to 101 conditions per place. [2020-10-16 03:25:11,092 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 20 selfloop transitions, 72 changer transitions 0/99 dead transitions. [2020-10-16 03:25:11,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 99 transitions, 1986 flow [2020-10-16 03:25:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 03:25:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-16 03:25:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1149 transitions. [2020-10-16 03:25:11,096 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758823529411765 [2020-10-16 03:25:11,096 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1149 transitions. [2020-10-16 03:25:11,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1149 transitions. [2020-10-16 03:25:11,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:11,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1149 transitions. [2020-10-16 03:25:11,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-16 03:25:11,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-16 03:25:11,104 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-16 03:25:11,104 INFO L185 Difference]: Start difference. First operand has 118 places, 82 transitions, 1306 flow. Second operand 17 states and 1149 transitions. [2020-10-16 03:25:11,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 99 transitions, 1986 flow [2020-10-16 03:25:11,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 99 transitions, 1838 flow, removed 42 selfloop flow, removed 10 redundant places. [2020-10-16 03:25:11,132 INFO L241 Difference]: Finished difference. Result has 127 places, 86 transitions, 1484 flow [2020-10-16 03:25:11,133 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1484, PETRI_PLACES=127, PETRI_TRANSITIONS=86} [2020-10-16 03:25:11,133 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 109 predicate places. [2020-10-16 03:25:11,133 INFO L481 AbstractCegarLoop]: Abstraction has has 127 places, 86 transitions, 1484 flow [2020-10-16 03:25:11,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:25:11,133 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:11,133 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:11,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:11,346 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:11,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1022892103, now seen corresponding path program 18 times [2020-10-16 03:25:11,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:11,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911495044] [2020-10-16 03:25:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:11,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911495044] [2020-10-16 03:25:11,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36057489] [2020-10-16 03:25:11,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:11,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 03:25:11,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:11,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:25:11,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:11,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:25:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:11,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:11,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 03:25:11,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256081025] [2020-10-16 03:25:11,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:25:11,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:11,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:25:11,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:25:11,490 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:11,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 86 transitions, 1484 flow. Second operand 11 states. [2020-10-16 03:25:11,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:11,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:11,491 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:11,811 INFO L129 PetriNetUnfolder]: 78/195 cut-off events. [2020-10-16 03:25:11,811 INFO L130 PetriNetUnfolder]: For 5048/5050 co-relation queries the response was YES. [2020-10-16 03:25:11,813 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 195 events. 78/195 cut-off events. For 5048/5050 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 783 event pairs, 0 based on Foata normal form. 3/198 useless extension candidates. Maximal degree in co-relation 1849. Up to 105 conditions per place. [2020-10-16 03:25:11,816 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 41 selfloop transitions, 54 changer transitions 0/102 dead transitions. [2020-10-16 03:25:11,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 102 transitions, 2138 flow [2020-10-16 03:25:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:25:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:25:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1081 transitions. [2020-10-16 03:25:11,818 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675625 [2020-10-16 03:25:11,818 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1081 transitions. [2020-10-16 03:25:11,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1081 transitions. [2020-10-16 03:25:11,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:11,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1081 transitions. [2020-10-16 03:25:11,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:25:11,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:25:11,822 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:25:11,822 INFO L185 Difference]: Start difference. First operand has 127 places, 86 transitions, 1484 flow. Second operand 16 states and 1081 transitions. [2020-10-16 03:25:11,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 102 transitions, 2138 flow [2020-10-16 03:25:11,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 102 transitions, 1940 flow, removed 45 selfloop flow, removed 13 redundant places. [2020-10-16 03:25:11,848 INFO L241 Difference]: Finished difference. Result has 131 places, 89 transitions, 1520 flow [2020-10-16 03:25:11,848 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1520, PETRI_PLACES=131, PETRI_TRANSITIONS=89} [2020-10-16 03:25:11,849 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 113 predicate places. [2020-10-16 03:25:11,849 INFO L481 AbstractCegarLoop]: Abstraction has has 131 places, 89 transitions, 1520 flow [2020-10-16 03:25:11,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:25:11,849 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:11,849 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:12,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:12,065 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:12,065 INFO L82 PathProgramCache]: Analyzing trace with hash 544475848, now seen corresponding path program 19 times [2020-10-16 03:25:12,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:12,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275358633] [2020-10-16 03:25:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:12,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275358633] [2020-10-16 03:25:12,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867002986] [2020-10-16 03:25:12,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:12,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:25:12,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:12,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:25:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:12,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:12,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 03:25:12,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998964177] [2020-10-16 03:25:12,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:25:12,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:12,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:25:12,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:25:12,221 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:12,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 89 transitions, 1520 flow. Second operand 12 states. [2020-10-16 03:25:12,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:12,222 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:12,222 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:12,543 INFO L129 PetriNetUnfolder]: 81/202 cut-off events. [2020-10-16 03:25:12,544 INFO L130 PetriNetUnfolder]: For 5395/5397 co-relation queries the response was YES. [2020-10-16 03:25:12,547 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 202 events. 81/202 cut-off events. For 5395/5397 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 816 event pairs, 0 based on Foata normal form. 1/203 useless extension candidates. Maximal degree in co-relation 1933. Up to 109 conditions per place. [2020-10-16 03:25:12,550 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 23 selfloop transitions, 76 changer transitions 0/106 dead transitions. [2020-10-16 03:25:12,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 106 transitions, 2254 flow [2020-10-16 03:25:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:25:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:25:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1081 transitions. [2020-10-16 03:25:12,552 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675625 [2020-10-16 03:25:12,552 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1081 transitions. [2020-10-16 03:25:12,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1081 transitions. [2020-10-16 03:25:12,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:12,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1081 transitions. [2020-10-16 03:25:12,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:25:12,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:25:12,559 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:25:12,559 INFO L185 Difference]: Start difference. First operand has 131 places, 89 transitions, 1520 flow. Second operand 16 states and 1081 transitions. [2020-10-16 03:25:12,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 106 transitions, 2254 flow [2020-10-16 03:25:12,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 106 transitions, 2091 flow, removed 39 selfloop flow, removed 13 redundant places. [2020-10-16 03:25:12,587 INFO L241 Difference]: Finished difference. Result has 135 places, 92 transitions, 1647 flow [2020-10-16 03:25:12,588 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1647, PETRI_PLACES=135, PETRI_TRANSITIONS=92} [2020-10-16 03:25:12,588 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 117 predicate places. [2020-10-16 03:25:12,588 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 92 transitions, 1647 flow [2020-10-16 03:25:12,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:25:12,588 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:12,588 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:12,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:12,804 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash 973804627, now seen corresponding path program 20 times [2020-10-16 03:25:12,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:12,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509978627] [2020-10-16 03:25:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:12,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509978627] [2020-10-16 03:25:12,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834798369] [2020-10-16 03:25:12,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:12,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:12,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:12,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:25:12,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:12,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:12,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 03:25:12,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610430343] [2020-10-16 03:25:12,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:25:12,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:12,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:25:12,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:25:12,947 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:12,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 92 transitions, 1647 flow. Second operand 11 states. [2020-10-16 03:25:12,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:12,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:12,948 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:13,112 INFO L129 PetriNetUnfolder]: 83/208 cut-off events. [2020-10-16 03:25:13,113 INFO L130 PetriNetUnfolder]: For 5951/5953 co-relation queries the response was YES. [2020-10-16 03:25:13,115 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 208 events. 83/208 cut-off events. For 5951/5953 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 846 event pairs, 0 based on Foata normal form. 4/212 useless extension candidates. Maximal degree in co-relation 2033. Up to 124 conditions per place. [2020-10-16 03:25:13,118 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 77 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2020-10-16 03:25:13,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 103 transitions, 2207 flow [2020-10-16 03:25:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:25:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:25:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 808 transitions. [2020-10-16 03:25:13,120 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2020-10-16 03:25:13,120 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 808 transitions. [2020-10-16 03:25:13,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 808 transitions. [2020-10-16 03:25:13,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:13,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 808 transitions. [2020-10-16 03:25:13,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:25:13,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:25:13,123 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:25:13,123 INFO L185 Difference]: Start difference. First operand has 135 places, 92 transitions, 1647 flow. Second operand 12 states and 808 transitions. [2020-10-16 03:25:13,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 103 transitions, 2207 flow [2020-10-16 03:25:13,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 103 transitions, 2013 flow, removed 32 selfloop flow, removed 13 redundant places. [2020-10-16 03:25:13,150 INFO L241 Difference]: Finished difference. Result has 135 places, 94 transitions, 1569 flow [2020-10-16 03:25:13,150 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1569, PETRI_PLACES=135, PETRI_TRANSITIONS=94} [2020-10-16 03:25:13,150 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 117 predicate places. [2020-10-16 03:25:13,150 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 94 transitions, 1569 flow [2020-10-16 03:25:13,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:25:13,150 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:13,151 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:13,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 03:25:13,366 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1417527963, now seen corresponding path program 21 times [2020-10-16 03:25:13,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:13,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275696431] [2020-10-16 03:25:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:13,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275696431] [2020-10-16 03:25:13,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290022517] [2020-10-16 03:25:13,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:13,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 03:25:13,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:13,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:25:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:13,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:13,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 03:25:13,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379468186] [2020-10-16 03:25:13,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:25:13,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:13,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:25:13,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:25:13,532 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:13,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 94 transitions, 1569 flow. Second operand 11 states. [2020-10-16 03:25:13,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:13,533 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:13,533 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:13,778 INFO L129 PetriNetUnfolder]: 87/218 cut-off events. [2020-10-16 03:25:13,778 INFO L130 PetriNetUnfolder]: For 7106/7108 co-relation queries the response was YES. [2020-10-16 03:25:13,780 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2217 conditions, 218 events. 87/218 cut-off events. For 7106/7108 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 891 event pairs, 0 based on Foata normal form. 4/222 useless extension candidates. Maximal degree in co-relation 2154. Up to 121 conditions per place. [2020-10-16 03:25:13,783 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 66 selfloop transitions, 37 changer transitions 0/110 dead transitions. [2020-10-16 03:25:13,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 110 transitions, 2277 flow [2020-10-16 03:25:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:25:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:25:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1079 transitions. [2020-10-16 03:25:13,786 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674375 [2020-10-16 03:25:13,786 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1079 transitions. [2020-10-16 03:25:13,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1079 transitions. [2020-10-16 03:25:13,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:13,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1079 transitions. [2020-10-16 03:25:13,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:25:13,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:25:13,790 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:25:13,790 INFO L185 Difference]: Start difference. First operand has 135 places, 94 transitions, 1569 flow. Second operand 16 states and 1079 transitions. [2020-10-16 03:25:13,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 110 transitions, 2277 flow [2020-10-16 03:25:13,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 110 transitions, 2171 flow, removed 36 selfloop flow, removed 9 redundant places. [2020-10-16 03:25:13,822 INFO L241 Difference]: Finished difference. Result has 146 places, 99 transitions, 1699 flow [2020-10-16 03:25:13,823 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1699, PETRI_PLACES=146, PETRI_TRANSITIONS=99} [2020-10-16 03:25:13,823 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 128 predicate places. [2020-10-16 03:25:13,823 INFO L481 AbstractCegarLoop]: Abstraction has has 146 places, 99 transitions, 1699 flow [2020-10-16 03:25:13,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:25:13,823 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:13,823 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:14,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 03:25:14,031 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:14,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:14,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1644884649, now seen corresponding path program 22 times [2020-10-16 03:25:14,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:14,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156667351] [2020-10-16 03:25:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:14,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156667351] [2020-10-16 03:25:14,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701691575] [2020-10-16 03:25:14,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:14,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:25:14,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:14,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:25:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:14,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:14,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 03:25:14,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835583887] [2020-10-16 03:25:14,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:25:14,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:14,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:25:14,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:25:14,191 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:14,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 99 transitions, 1699 flow. Second operand 11 states. [2020-10-16 03:25:14,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:14,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:14,192 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:14,505 INFO L129 PetriNetUnfolder]: 96/239 cut-off events. [2020-10-16 03:25:14,506 INFO L130 PetriNetUnfolder]: For 8833/8835 co-relation queries the response was YES. [2020-10-16 03:25:14,508 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2578 conditions, 239 events. 96/239 cut-off events. For 8833/8835 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 958 event pairs, 0 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 2510. Up to 135 conditions per place. [2020-10-16 03:25:14,514 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 38 selfloop transitions, 76 changer transitions 0/121 dead transitions. [2020-10-16 03:25:14,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 121 transitions, 2717 flow [2020-10-16 03:25:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:25:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:25:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1352 transitions. [2020-10-16 03:25:14,528 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 03:25:14,528 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1352 transitions. [2020-10-16 03:25:14,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1352 transitions. [2020-10-16 03:25:14,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:14,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1352 transitions. [2020-10-16 03:25:14,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:25:14,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:25:14,539 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:25:14,540 INFO L185 Difference]: Start difference. First operand has 146 places, 99 transitions, 1699 flow. Second operand 20 states and 1352 transitions. [2020-10-16 03:25:14,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 121 transitions, 2717 flow [2020-10-16 03:25:14,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 121 transitions, 2559 flow, removed 52 selfloop flow, removed 10 redundant places. [2020-10-16 03:25:14,578 INFO L241 Difference]: Finished difference. Result has 159 places, 105 transitions, 1985 flow [2020-10-16 03:25:14,579 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1985, PETRI_PLACES=159, PETRI_TRANSITIONS=105} [2020-10-16 03:25:14,579 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 141 predicate places. [2020-10-16 03:25:14,579 INFO L481 AbstractCegarLoop]: Abstraction has has 159 places, 105 transitions, 1985 flow [2020-10-16 03:25:14,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:25:14,579 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:14,580 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:14,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 03:25:14,792 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:14,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:14,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1644901389, now seen corresponding path program 23 times [2020-10-16 03:25:14,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:14,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837797731] [2020-10-16 03:25:14,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:14,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837797731] [2020-10-16 03:25:14,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549333938] [2020-10-16 03:25:14,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:14,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 03:25:14,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:14,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:25:14,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:14,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:14,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:14,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 03:25:14,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316153939] [2020-10-16 03:25:14,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:25:14,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:14,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:25:14,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:25:14,948 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:14,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 105 transitions, 1985 flow. Second operand 12 states. [2020-10-16 03:25:14,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:14,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:14,949 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:15,341 INFO L129 PetriNetUnfolder]: 93/234 cut-off events. [2020-10-16 03:25:15,342 INFO L130 PetriNetUnfolder]: For 9769/9775 co-relation queries the response was YES. [2020-10-16 03:25:15,344 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2636 conditions, 234 events. 93/234 cut-off events. For 9769/9775 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 971 event pairs, 0 based on Foata normal form. 8/242 useless extension candidates. Maximal degree in co-relation 2564. Up to 131 conditions per place. [2020-10-16 03:25:15,347 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 38 selfloop transitions, 76 changer transitions 0/121 dead transitions. [2020-10-16 03:25:15,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 121 transitions, 2843 flow [2020-10-16 03:25:15,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 03:25:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 03:25:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1284 transitions. [2020-10-16 03:25:15,352 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757894736842105 [2020-10-16 03:25:15,352 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1284 transitions. [2020-10-16 03:25:15,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1284 transitions. [2020-10-16 03:25:15,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:15,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1284 transitions. [2020-10-16 03:25:15,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 03:25:15,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 03:25:15,357 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 03:25:15,357 INFO L185 Difference]: Start difference. First operand has 159 places, 105 transitions, 1985 flow. Second operand 19 states and 1284 transitions. [2020-10-16 03:25:15,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 121 transitions, 2843 flow [2020-10-16 03:25:15,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 121 transitions, 2565 flow, removed 80 selfloop flow, removed 17 redundant places. [2020-10-16 03:25:15,404 INFO L241 Difference]: Finished difference. Result has 162 places, 106 transitions, 1941 flow [2020-10-16 03:25:15,404 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1941, PETRI_PLACES=162, PETRI_TRANSITIONS=106} [2020-10-16 03:25:15,404 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 144 predicate places. [2020-10-16 03:25:15,404 INFO L481 AbstractCegarLoop]: Abstraction has has 162 places, 106 transitions, 1941 flow [2020-10-16 03:25:15,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:25:15,405 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:15,405 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:15,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 03:25:15,619 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:15,619 INFO L82 PathProgramCache]: Analyzing trace with hash 372575520, now seen corresponding path program 24 times [2020-10-16 03:25:15,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:15,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7686056] [2020-10-16 03:25:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:15,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7686056] [2020-10-16 03:25:15,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175459727] [2020-10-16 03:25:15,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:15,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 03:25:15,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:15,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:25:15,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:15,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:15,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 03:25:15,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569270315] [2020-10-16 03:25:15,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:25:15,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:15,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:25:15,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:25:15,790 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:15,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 106 transitions, 1941 flow. Second operand 12 states. [2020-10-16 03:25:15,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:15,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:15,791 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:15,998 INFO L129 PetriNetUnfolder]: 95/240 cut-off events. [2020-10-16 03:25:15,998 INFO L130 PetriNetUnfolder]: For 10532/10534 co-relation queries the response was YES. [2020-10-16 03:25:16,001 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 240 events. 95/240 cut-off events. For 10532/10534 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1000 event pairs, 0 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 2633. Up to 133 conditions per place. [2020-10-16 03:25:16,005 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 78 selfloop transitions, 34 changer transitions 0/119 dead transitions. [2020-10-16 03:25:16,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 119 transitions, 2681 flow [2020-10-16 03:25:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 03:25:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-16 03:25:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 943 transitions. [2020-10-16 03:25:16,008 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6735714285714286 [2020-10-16 03:25:16,008 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 943 transitions. [2020-10-16 03:25:16,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 943 transitions. [2020-10-16 03:25:16,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:16,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 943 transitions. [2020-10-16 03:25:16,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-16 03:25:16,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-16 03:25:16,011 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-16 03:25:16,011 INFO L185 Difference]: Start difference. First operand has 162 places, 106 transitions, 1941 flow. Second operand 14 states and 943 transitions. [2020-10-16 03:25:16,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 119 transitions, 2681 flow [2020-10-16 03:25:16,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 119 transitions, 2463 flow, removed 41 selfloop flow, removed 17 redundant places. [2020-10-16 03:25:16,062 INFO L241 Difference]: Finished difference. Result has 160 places, 108 transitions, 1919 flow [2020-10-16 03:25:16,063 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1919, PETRI_PLACES=160, PETRI_TRANSITIONS=108} [2020-10-16 03:25:16,063 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 142 predicate places. [2020-10-16 03:25:16,063 INFO L481 AbstractCegarLoop]: Abstraction has has 160 places, 108 transitions, 1919 flow [2020-10-16 03:25:16,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:25:16,063 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:16,063 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:16,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 03:25:16,279 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:16,279 INFO L82 PathProgramCache]: Analyzing trace with hash -723873914, now seen corresponding path program 25 times [2020-10-16 03:25:16,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:16,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839251019] [2020-10-16 03:25:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:16,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839251019] [2020-10-16 03:25:16,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119017308] [2020-10-16 03:25:16,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:16,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:25:16,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:16,458 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:16,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:16,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:25:16,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545522695] [2020-10-16 03:25:16,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:25:16,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:16,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:25:16,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:25:16,476 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:16,476 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 108 transitions, 1919 flow. Second operand 13 states. [2020-10-16 03:25:16,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:16,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:16,477 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:16,747 INFO L129 PetriNetUnfolder]: 99/251 cut-off events. [2020-10-16 03:25:16,747 INFO L130 PetriNetUnfolder]: For 10493/10499 co-relation queries the response was YES. [2020-10-16 03:25:16,749 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2772 conditions, 251 events. 99/251 cut-off events. For 10493/10499 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1068 event pairs, 0 based on Foata normal form. 8/259 useless extension candidates. Maximal degree in co-relation 2698. Up to 141 conditions per place. [2020-10-16 03:25:16,753 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 68 selfloop transitions, 48 changer transitions 0/123 dead transitions. [2020-10-16 03:25:16,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 123 transitions, 2688 flow [2020-10-16 03:25:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 03:25:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-16 03:25:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1011 transitions. [2020-10-16 03:25:16,756 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 03:25:16,756 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1011 transitions. [2020-10-16 03:25:16,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1011 transitions. [2020-10-16 03:25:16,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:16,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1011 transitions. [2020-10-16 03:25:16,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-16 03:25:16,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-16 03:25:16,760 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-16 03:25:16,760 INFO L185 Difference]: Start difference. First operand has 160 places, 108 transitions, 1919 flow. Second operand 15 states and 1011 transitions. [2020-10-16 03:25:16,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 123 transitions, 2688 flow [2020-10-16 03:25:16,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 123 transitions, 2556 flow, removed 36 selfloop flow, removed 11 redundant places. [2020-10-16 03:25:16,830 INFO L241 Difference]: Finished difference. Result has 165 places, 112 transitions, 2032 flow [2020-10-16 03:25:16,830 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2032, PETRI_PLACES=165, PETRI_TRANSITIONS=112} [2020-10-16 03:25:16,830 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 147 predicate places. [2020-10-16 03:25:16,830 INFO L481 AbstractCegarLoop]: Abstraction has has 165 places, 112 transitions, 2032 flow [2020-10-16 03:25:16,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:25:16,831 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:16,831 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:17,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:17,046 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash -301607478, now seen corresponding path program 26 times [2020-10-16 03:25:17,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:17,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068105528] [2020-10-16 03:25:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:17,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068105528] [2020-10-16 03:25:17,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222229239] [2020-10-16 03:25:17,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:17,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:17,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:17,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:25:17,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:17,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:17,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:17,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:25:17,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693805584] [2020-10-16 03:25:17,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:25:17,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:17,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:25:17,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:25:17,219 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:17,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 112 transitions, 2032 flow. Second operand 13 states. [2020-10-16 03:25:17,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:17,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:17,220 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:17,647 INFO L129 PetriNetUnfolder]: 103/263 cut-off events. [2020-10-16 03:25:17,647 INFO L130 PetriNetUnfolder]: For 11578/11584 co-relation queries the response was YES. [2020-10-16 03:25:17,649 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2967 conditions, 263 events. 103/263 cut-off events. For 11578/11584 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1136 event pairs, 0 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 2891. Up to 149 conditions per place. [2020-10-16 03:25:17,652 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 36 selfloop transitions, 88 changer transitions 0/131 dead transitions. [2020-10-16 03:25:17,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 131 transitions, 2989 flow [2020-10-16 03:25:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 03:25:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 03:25:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1283 transitions. [2020-10-16 03:25:17,654 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752631578947368 [2020-10-16 03:25:17,654 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1283 transitions. [2020-10-16 03:25:17,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1283 transitions. [2020-10-16 03:25:17,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:17,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1283 transitions. [2020-10-16 03:25:17,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 03:25:17,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 03:25:17,658 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 03:25:17,658 INFO L185 Difference]: Start difference. First operand has 165 places, 112 transitions, 2032 flow. Second operand 19 states and 1283 transitions. [2020-10-16 03:25:17,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 131 transitions, 2989 flow [2020-10-16 03:25:17,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 131 transitions, 2811 flow, removed 49 selfloop flow, removed 12 redundant places. [2020-10-16 03:25:17,694 INFO L241 Difference]: Finished difference. Result has 173 places, 116 transitions, 2211 flow [2020-10-16 03:25:17,694 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2211, PETRI_PLACES=173, PETRI_TRANSITIONS=116} [2020-10-16 03:25:17,695 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 155 predicate places. [2020-10-16 03:25:17,695 INFO L481 AbstractCegarLoop]: Abstraction has has 173 places, 116 transitions, 2211 flow [2020-10-16 03:25:17,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:25:17,695 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:17,695 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:17,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 03:25:17,896 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash -301117368, now seen corresponding path program 27 times [2020-10-16 03:25:17,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:17,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856085075] [2020-10-16 03:25:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:17,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856085075] [2020-10-16 03:25:17,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314229143] [2020-10-16 03:25:17,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:18,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 03:25:18,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:25:18,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:18,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:18,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 03:25:18,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152035637] [2020-10-16 03:25:18,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:25:18,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:18,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:25:18,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:25:18,084 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:18,085 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 116 transitions, 2211 flow. Second operand 12 states. [2020-10-16 03:25:18,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:18,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:18,086 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:18,521 INFO L129 PetriNetUnfolder]: 112/285 cut-off events. [2020-10-16 03:25:18,521 INFO L130 PetriNetUnfolder]: For 12865/12871 co-relation queries the response was YES. [2020-10-16 03:25:18,524 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3343 conditions, 285 events. 112/285 cut-off events. For 12865/12871 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1236 event pairs, 0 based on Foata normal form. 5/290 useless extension candidates. Maximal degree in co-relation 3265. Up to 163 conditions per place. [2020-10-16 03:25:18,530 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 29 selfloop transitions, 104 changer transitions 0/140 dead transitions. [2020-10-16 03:25:18,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 140 transitions, 3429 flow [2020-10-16 03:25:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:25:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:25:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1352 transitions. [2020-10-16 03:25:18,533 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 03:25:18,533 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1352 transitions. [2020-10-16 03:25:18,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1352 transitions. [2020-10-16 03:25:18,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:18,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1352 transitions. [2020-10-16 03:25:18,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:25:18,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:25:18,538 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:25:18,538 INFO L185 Difference]: Start difference. First operand has 173 places, 116 transitions, 2211 flow. Second operand 20 states and 1352 transitions. [2020-10-16 03:25:18,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 140 transitions, 3429 flow [2020-10-16 03:25:18,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 140 transitions, 3165 flow, removed 58 selfloop flow, removed 16 redundant places. [2020-10-16 03:25:18,600 INFO L241 Difference]: Finished difference. Result has 180 places, 122 transitions, 2485 flow [2020-10-16 03:25:18,600 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2485, PETRI_PLACES=180, PETRI_TRANSITIONS=122} [2020-10-16 03:25:18,600 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 162 predicate places. [2020-10-16 03:25:18,600 INFO L481 AbstractCegarLoop]: Abstraction has has 180 places, 122 transitions, 2485 flow [2020-10-16 03:25:18,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:25:18,601 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:18,601 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:18,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 03:25:18,815 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:18,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:18,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2103231458, now seen corresponding path program 28 times [2020-10-16 03:25:18,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:18,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572212640] [2020-10-16 03:25:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:18,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572212640] [2020-10-16 03:25:18,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586272263] [2020-10-16 03:25:18,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:18,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:25:18,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:18,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:25:18,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:18,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:18,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:18,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:25:18,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370610053] [2020-10-16 03:25:18,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:25:18,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:18,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:25:18,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:25:18,982 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:18,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 122 transitions, 2485 flow. Second operand 13 states. [2020-10-16 03:25:18,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:18,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:18,983 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:19,488 INFO L129 PetriNetUnfolder]: 109/279 cut-off events. [2020-10-16 03:25:19,488 INFO L130 PetriNetUnfolder]: For 14260/14262 co-relation queries the response was YES. [2020-10-16 03:25:19,491 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3394 conditions, 279 events. 109/279 cut-off events. For 14260/14262 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1241 event pairs, 0 based on Foata normal form. 4/283 useless extension candidates. Maximal degree in co-relation 3312. Up to 159 conditions per place. [2020-10-16 03:25:19,496 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 27 selfloop transitions, 106 changer transitions 0/140 dead transitions. [2020-10-16 03:25:19,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 140 transitions, 3525 flow [2020-10-16 03:25:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 03:25:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 03:25:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1419 transitions. [2020-10-16 03:25:19,499 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757142857142857 [2020-10-16 03:25:19,499 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1419 transitions. [2020-10-16 03:25:19,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1419 transitions. [2020-10-16 03:25:19,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:19,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1419 transitions. [2020-10-16 03:25:19,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 03:25:19,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 03:25:19,506 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 03:25:19,506 INFO L185 Difference]: Start difference. First operand has 180 places, 122 transitions, 2485 flow. Second operand 21 states and 1419 transitions. [2020-10-16 03:25:19,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 140 transitions, 3525 flow [2020-10-16 03:25:19,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 140 transitions, 3197 flow, removed 85 selfloop flow, removed 15 redundant places. [2020-10-16 03:25:19,581 INFO L241 Difference]: Finished difference. Result has 187 places, 123 transitions, 2463 flow [2020-10-16 03:25:19,581 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2463, PETRI_PLACES=187, PETRI_TRANSITIONS=123} [2020-10-16 03:25:19,582 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 169 predicate places. [2020-10-16 03:25:19,582 INFO L481 AbstractCegarLoop]: Abstraction has has 187 places, 123 transitions, 2463 flow [2020-10-16 03:25:19,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:25:19,582 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:19,582 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:19,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:19,796 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash -547648186, now seen corresponding path program 29 times [2020-10-16 03:25:19,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:19,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71922770] [2020-10-16 03:25:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:19,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71922770] [2020-10-16 03:25:19,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247108466] [2020-10-16 03:25:19,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:19,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 03:25:19,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:25:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:19,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:25:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:19,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:19,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:25:19,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703402461] [2020-10-16 03:25:19,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:25:19,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:25:19,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:25:19,960 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:19,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 123 transitions, 2463 flow. Second operand 13 states. [2020-10-16 03:25:19,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:19,961 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:19,961 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:20,400 INFO L129 PetriNetUnfolder]: 112/284 cut-off events. [2020-10-16 03:25:20,400 INFO L130 PetriNetUnfolder]: For 15335/15337 co-relation queries the response was YES. [2020-10-16 03:25:20,403 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3505 conditions, 284 events. 112/284 cut-off events. For 15335/15337 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1256 event pairs, 0 based on Foata normal form. 3/287 useless extension candidates. Maximal degree in co-relation 3421. Up to 161 conditions per place. [2020-10-16 03:25:20,407 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 49 selfloop transitions, 86 changer transitions 0/142 dead transitions. [2020-10-16 03:25:20,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 142 transitions, 3559 flow [2020-10-16 03:25:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:25:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:25:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2020-10-16 03:25:20,410 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 03:25:20,410 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2020-10-16 03:25:20,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2020-10-16 03:25:20,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:20,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2020-10-16 03:25:20,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:25:20,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:25:20,416 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:25:20,416 INFO L185 Difference]: Start difference. First operand has 187 places, 123 transitions, 2463 flow. Second operand 20 states and 1351 transitions. [2020-10-16 03:25:20,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 142 transitions, 3559 flow [2020-10-16 03:25:20,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 142 transitions, 3275 flow, removed 50 selfloop flow, removed 18 redundant places. [2020-10-16 03:25:20,475 INFO L241 Difference]: Finished difference. Result has 190 places, 126 transitions, 2559 flow [2020-10-16 03:25:20,475 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2235, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2559, PETRI_PLACES=190, PETRI_TRANSITIONS=126} [2020-10-16 03:25:20,475 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 172 predicate places. [2020-10-16 03:25:20,475 INFO L481 AbstractCegarLoop]: Abstraction has has 190 places, 126 transitions, 2559 flow [2020-10-16 03:25:20,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:25:20,475 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:20,476 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:20,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:20,682 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:20,682 INFO L82 PathProgramCache]: Analyzing trace with hash -744168569, now seen corresponding path program 30 times [2020-10-16 03:25:20,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:20,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425317067] [2020-10-16 03:25:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:20,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425317067] [2020-10-16 03:25:20,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416675601] [2020-10-16 03:25:20,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:20,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 03:25:20,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:20,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:25:20,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:20,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:25:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:20,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:20,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 03:25:20,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246493715] [2020-10-16 03:25:20,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:25:20,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:20,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:25:20,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:25:20,850 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:20,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 126 transitions, 2559 flow. Second operand 14 states. [2020-10-16 03:25:20,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:20,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:20,850 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:21,316 INFO L129 PetriNetUnfolder]: 115/291 cut-off events. [2020-10-16 03:25:21,316 INFO L130 PetriNetUnfolder]: For 14738/14740 co-relation queries the response was YES. [2020-10-16 03:25:21,319 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3553 conditions, 291 events. 115/291 cut-off events. For 14738/14740 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1295 event pairs, 0 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 3467. Up to 165 conditions per place. [2020-10-16 03:25:21,323 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 30 selfloop transitions, 110 changer transitions 0/147 dead transitions. [2020-10-16 03:25:21,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 147 transitions, 3731 flow [2020-10-16 03:25:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:25:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:25:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2020-10-16 03:25:21,325 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 03:25:21,325 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2020-10-16 03:25:21,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2020-10-16 03:25:21,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:21,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2020-10-16 03:25:21,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:25:21,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:25:21,329 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:25:21,329 INFO L185 Difference]: Start difference. First operand has 190 places, 126 transitions, 2559 flow. Second operand 20 states and 1351 transitions. [2020-10-16 03:25:21,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 147 transitions, 3731 flow [2020-10-16 03:25:21,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 147 transitions, 3515 flow, removed 37 selfloop flow, removed 17 redundant places. [2020-10-16 03:25:21,384 INFO L241 Difference]: Finished difference. Result has 194 places, 129 transitions, 2727 flow [2020-10-16 03:25:21,384 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2727, PETRI_PLACES=194, PETRI_TRANSITIONS=129} [2020-10-16 03:25:21,385 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 176 predicate places. [2020-10-16 03:25:21,385 INFO L481 AbstractCegarLoop]: Abstraction has has 194 places, 129 transitions, 2727 flow [2020-10-16 03:25:21,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:25:21,385 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:21,385 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:21,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 03:25:21,596 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash -476608046, now seen corresponding path program 31 times [2020-10-16 03:25:21,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:21,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883400106] [2020-10-16 03:25:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:21,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883400106] [2020-10-16 03:25:21,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011907644] [2020-10-16 03:25:21,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:21,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:25:21,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:21,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:21,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 03:25:21,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927687201] [2020-10-16 03:25:21,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:25:21,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:21,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:25:21,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:25:21,774 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:21,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 129 transitions, 2727 flow. Second operand 13 states. [2020-10-16 03:25:21,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:21,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:21,775 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:22,005 INFO L129 PetriNetUnfolder]: 117/298 cut-off events. [2020-10-16 03:25:22,005 INFO L130 PetriNetUnfolder]: For 16631/16633 co-relation queries the response was YES. [2020-10-16 03:25:22,008 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3744 conditions, 298 events. 117/298 cut-off events. For 16631/16633 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1329 event pairs, 0 based on Foata normal form. 4/302 useless extension candidates. Maximal degree in co-relation 3656. Up to 184 conditions per place. [2020-10-16 03:25:22,013 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 114 selfloop transitions, 21 changer transitions 0/142 dead transitions. [2020-10-16 03:25:22,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 142 transitions, 3587 flow [2020-10-16 03:25:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 03:25:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-16 03:25:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 942 transitions. [2020-10-16 03:25:22,016 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6728571428571428 [2020-10-16 03:25:22,016 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 942 transitions. [2020-10-16 03:25:22,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 942 transitions. [2020-10-16 03:25:22,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:22,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 942 transitions. [2020-10-16 03:25:22,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-16 03:25:22,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-16 03:25:22,020 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-16 03:25:22,020 INFO L185 Difference]: Start difference. First operand has 194 places, 129 transitions, 2727 flow. Second operand 14 states and 942 transitions. [2020-10-16 03:25:22,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 142 transitions, 3587 flow [2020-10-16 03:25:22,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 142 transitions, 3315 flow, removed 42 selfloop flow, removed 17 redundant places. [2020-10-16 03:25:22,081 INFO L241 Difference]: Finished difference. Result has 192 places, 131 transitions, 2599 flow [2020-10-16 03:25:22,082 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2599, PETRI_PLACES=192, PETRI_TRANSITIONS=131} [2020-10-16 03:25:22,082 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 174 predicate places. [2020-10-16 03:25:22,082 INFO L481 AbstractCegarLoop]: Abstraction has has 192 places, 131 transitions, 2599 flow [2020-10-16 03:25:22,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:25:22,082 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:22,082 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:22,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:22,288 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:22,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:22,288 INFO L82 PathProgramCache]: Analyzing trace with hash -219980600, now seen corresponding path program 32 times [2020-10-16 03:25:22,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:22,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652222111] [2020-10-16 03:25:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:22,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652222111] [2020-10-16 03:25:22,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134806174] [2020-10-16 03:25:22,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:22,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:22,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:25:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:22,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:22,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:22,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 03:25:22,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236885557] [2020-10-16 03:25:22,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:25:22,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:22,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:25:22,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:25:22,461 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:22,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 131 transitions, 2599 flow. Second operand 14 states. [2020-10-16 03:25:22,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:22,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:22,462 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:22,804 INFO L129 PetriNetUnfolder]: 129/332 cut-off events. [2020-10-16 03:25:22,804 INFO L130 PetriNetUnfolder]: For 20515/20521 co-relation queries the response was YES. [2020-10-16 03:25:22,807 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4209 conditions, 332 events. 129/332 cut-off events. For 20515/20521 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1561 event pairs, 0 based on Foata normal form. 8/340 useless extension candidates. Maximal degree in co-relation 4119. Up to 191 conditions per place. [2020-10-16 03:25:22,812 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 95 selfloop transitions, 54 changer transitions 0/156 dead transitions. [2020-10-16 03:25:22,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 156 transitions, 3849 flow [2020-10-16 03:25:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 03:25:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-16 03:25:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1146 transitions. [2020-10-16 03:25:22,814 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741176470588235 [2020-10-16 03:25:22,814 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1146 transitions. [2020-10-16 03:25:22,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1146 transitions. [2020-10-16 03:25:22,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:22,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1146 transitions. [2020-10-16 03:25:22,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-16 03:25:22,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-16 03:25:22,818 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-16 03:25:22,818 INFO L185 Difference]: Start difference. First operand has 192 places, 131 transitions, 2599 flow. Second operand 17 states and 1146 transitions. [2020-10-16 03:25:22,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 156 transitions, 3849 flow [2020-10-16 03:25:22,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 156 transitions, 3721 flow, removed 45 selfloop flow, removed 11 redundant places. [2020-10-16 03:25:22,870 INFO L241 Difference]: Finished difference. Result has 203 places, 143 transitions, 3011 flow [2020-10-16 03:25:22,871 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3011, PETRI_PLACES=203, PETRI_TRANSITIONS=143} [2020-10-16 03:25:22,871 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 185 predicate places. [2020-10-16 03:25:22,871 INFO L481 AbstractCegarLoop]: Abstraction has has 203 places, 143 transitions, 3011 flow [2020-10-16 03:25:22,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:25:22,871 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:22,871 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:23,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 03:25:23,072 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:23,073 INFO L82 PathProgramCache]: Analyzing trace with hash 202792686, now seen corresponding path program 33 times [2020-10-16 03:25:23,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:23,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27804095] [2020-10-16 03:25:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:23,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27804095] [2020-10-16 03:25:23,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935432619] [2020-10-16 03:25:23,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:23,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 03:25:23,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:23,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:25:23,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:23,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:23,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:23,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 03:25:23,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770905534] [2020-10-16 03:25:23,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:25:23,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:23,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:25:23,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:25:23,242 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:23,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 143 transitions, 3011 flow. Second operand 14 states. [2020-10-16 03:25:23,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:23,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:23,245 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:23,791 INFO L129 PetriNetUnfolder]: 133/342 cut-off events. [2020-10-16 03:25:23,792 INFO L130 PetriNetUnfolder]: For 22559/22565 co-relation queries the response was YES. [2020-10-16 03:25:23,795 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4482 conditions, 342 events. 133/342 cut-off events. For 22559/22565 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1607 event pairs, 0 based on Foata normal form. 8/350 useless extension candidates. Maximal degree in co-relation 4386. Up to 197 conditions per place. [2020-10-16 03:25:23,800 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 47 selfloop transitions, 112 changer transitions 0/166 dead transitions. [2020-10-16 03:25:23,800 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 166 transitions, 4419 flow [2020-10-16 03:25:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 03:25:23,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 03:25:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1554 transitions. [2020-10-16 03:25:23,802 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6756521739130434 [2020-10-16 03:25:23,803 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1554 transitions. [2020-10-16 03:25:23,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1554 transitions. [2020-10-16 03:25:23,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:23,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1554 transitions. [2020-10-16 03:25:23,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 03:25:23,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 03:25:23,808 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 03:25:23,808 INFO L185 Difference]: Start difference. First operand has 203 places, 143 transitions, 3011 flow. Second operand 23 states and 1554 transitions. [2020-10-16 03:25:23,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 166 transitions, 4419 flow [2020-10-16 03:25:23,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 166 transitions, 4237 flow, removed 64 selfloop flow, removed 10 redundant places. [2020-10-16 03:25:23,927 INFO L241 Difference]: Finished difference. Result has 218 places, 147 transitions, 3320 flow [2020-10-16 03:25:23,928 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3320, PETRI_PLACES=218, PETRI_TRANSITIONS=147} [2020-10-16 03:25:23,928 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 200 predicate places. [2020-10-16 03:25:23,928 INFO L481 AbstractCegarLoop]: Abstraction has has 218 places, 147 transitions, 3320 flow [2020-10-16 03:25:23,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:25:23,928 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:23,929 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:24,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:24,142 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:24,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1115003167, now seen corresponding path program 34 times [2020-10-16 03:25:24,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:24,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134230630] [2020-10-16 03:25:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:24,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134230630] [2020-10-16 03:25:24,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350842978] [2020-10-16 03:25:24,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:24,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:25:24,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:25:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:24,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:24,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 03:25:24,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328305690] [2020-10-16 03:25:24,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:25:24,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:24,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:25:24,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:25:24,336 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:24,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 147 transitions, 3320 flow. Second operand 14 states. [2020-10-16 03:25:24,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:24,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:24,338 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:24,629 INFO L129 PetriNetUnfolder]: 135/349 cut-off events. [2020-10-16 03:25:24,629 INFO L130 PetriNetUnfolder]: For 23865/23871 co-relation queries the response was YES. [2020-10-16 03:25:24,632 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4715 conditions, 349 events. 135/349 cut-off events. For 23865/23871 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1647 event pairs, 0 based on Foata normal form. 5/354 useless extension candidates. Maximal degree in co-relation 4616. Up to 201 conditions per place. [2020-10-16 03:25:24,635 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 111 selfloop transitions, 44 changer transitions 0/162 dead transitions. [2020-10-16 03:25:24,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 162 transitions, 4362 flow [2020-10-16 03:25:24,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:25:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:25:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1077 transitions. [2020-10-16 03:25:24,638 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.673125 [2020-10-16 03:25:24,638 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1077 transitions. [2020-10-16 03:25:24,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1077 transitions. [2020-10-16 03:25:24,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:24,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1077 transitions. [2020-10-16 03:25:24,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:25:24,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:25:24,642 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:25:24,642 INFO L185 Difference]: Start difference. First operand has 218 places, 147 transitions, 3320 flow. Second operand 16 states and 1077 transitions. [2020-10-16 03:25:24,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 162 transitions, 4362 flow [2020-10-16 03:25:24,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 162 transitions, 4045 flow, removed 71 selfloop flow, removed 18 redundant places. [2020-10-16 03:25:24,720 INFO L241 Difference]: Finished difference. Result has 217 places, 149 transitions, 3217 flow [2020-10-16 03:25:24,721 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3017, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3217, PETRI_PLACES=217, PETRI_TRANSITIONS=149} [2020-10-16 03:25:24,721 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 199 predicate places. [2020-10-16 03:25:24,721 INFO L481 AbstractCegarLoop]: Abstraction has has 217 places, 149 transitions, 3217 flow [2020-10-16 03:25:24,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:25:24,721 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:24,722 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:24,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 03:25:24,922 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:24,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2146415779, now seen corresponding path program 35 times [2020-10-16 03:25:24,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:24,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744424894] [2020-10-16 03:25:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:25,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744424894] [2020-10-16 03:25:25,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260533584] [2020-10-16 03:25:25,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:25,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 03:25:25,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:25,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:25:25,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:25,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:25,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:25,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 03:25:25,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531934235] [2020-10-16 03:25:25,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 03:25:25,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:25,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 03:25:25,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-16 03:25:25,125 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:25,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 149 transitions, 3217 flow. Second operand 15 states. [2020-10-16 03:25:25,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:25,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:25,126 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:25,561 INFO L129 PetriNetUnfolder]: 141/366 cut-off events. [2020-10-16 03:25:25,561 INFO L130 PetriNetUnfolder]: For 26136/26138 co-relation queries the response was YES. [2020-10-16 03:25:25,565 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4938 conditions, 366 events. 141/366 cut-off events. For 26136/26138 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1769 event pairs, 0 based on Foata normal form. 4/370 useless extension candidates. Maximal degree in co-relation 4837. Up to 213 conditions per place. [2020-10-16 03:25:25,570 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 71 selfloop transitions, 92 changer transitions 0/170 dead transitions. [2020-10-16 03:25:25,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 170 transitions, 4473 flow [2020-10-16 03:25:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 03:25:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 03:25:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1281 transitions. [2020-10-16 03:25:25,577 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742105263157895 [2020-10-16 03:25:25,577 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1281 transitions. [2020-10-16 03:25:25,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1281 transitions. [2020-10-16 03:25:25,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:25,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1281 transitions. [2020-10-16 03:25:25,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 03:25:25,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 03:25:25,581 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 03:25:25,581 INFO L185 Difference]: Start difference. First operand has 217 places, 149 transitions, 3217 flow. Second operand 19 states and 1281 transitions. [2020-10-16 03:25:25,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 170 transitions, 4473 flow [2020-10-16 03:25:25,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 170 transitions, 4277 flow, removed 58 selfloop flow, removed 13 redundant places. [2020-10-16 03:25:25,663 INFO L241 Difference]: Finished difference. Result has 228 places, 155 transitions, 3514 flow [2020-10-16 03:25:25,663 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3514, PETRI_PLACES=228, PETRI_TRANSITIONS=155} [2020-10-16 03:25:25,663 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 210 predicate places. [2020-10-16 03:25:25,663 INFO L481 AbstractCegarLoop]: Abstraction has has 228 places, 155 transitions, 3514 flow [2020-10-16 03:25:25,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 03:25:25,663 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:25,663 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:25,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 03:25:25,864 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1610965881, now seen corresponding path program 36 times [2020-10-16 03:25:25,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:25,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770697326] [2020-10-16 03:25:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:25,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770697326] [2020-10-16 03:25:25,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995575801] [2020-10-16 03:25:25,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:26,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 03:25:26,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:25:26,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:26,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:26,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 03:25:26,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793495267] [2020-10-16 03:25:26,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:25:26,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:26,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:25:26,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:25:26,042 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:26,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 155 transitions, 3514 flow. Second operand 14 states. [2020-10-16 03:25:26,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:26,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:26,043 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:26,525 INFO L129 PetriNetUnfolder]: 145/378 cut-off events. [2020-10-16 03:25:26,525 INFO L130 PetriNetUnfolder]: For 27306/27308 co-relation queries the response was YES. [2020-10-16 03:25:26,530 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5178 conditions, 378 events. 145/378 cut-off events. For 27306/27308 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1828 event pairs, 0 based on Foata normal form. 2/380 useless extension candidates. Maximal degree in co-relation 5071. Up to 221 conditions per place. [2020-10-16 03:25:26,536 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 41 selfloop transitions, 130 changer transitions 0/178 dead transitions. [2020-10-16 03:25:26,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 178 transitions, 4938 flow [2020-10-16 03:25:26,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 03:25:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 03:25:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1485 transitions. [2020-10-16 03:25:26,538 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:25:26,539 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1485 transitions. [2020-10-16 03:25:26,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1485 transitions. [2020-10-16 03:25:26,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:26,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1485 transitions. [2020-10-16 03:25:26,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 03:25:26,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 03:25:26,544 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 03:25:26,544 INFO L185 Difference]: Start difference. First operand has 228 places, 155 transitions, 3514 flow. Second operand 22 states and 1485 transitions. [2020-10-16 03:25:26,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 178 transitions, 4938 flow [2020-10-16 03:25:26,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 178 transitions, 4709 flow, removed 63 selfloop flow, removed 12 redundant places. [2020-10-16 03:25:26,675 INFO L241 Difference]: Finished difference. Result has 239 places, 159 transitions, 3758 flow [2020-10-16 03:25:26,675 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3327, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3758, PETRI_PLACES=239, PETRI_TRANSITIONS=159} [2020-10-16 03:25:26,676 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 221 predicate places. [2020-10-16 03:25:26,676 INFO L481 AbstractCegarLoop]: Abstraction has has 239 places, 159 transitions, 3758 flow [2020-10-16 03:25:26,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:25:26,676 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:26,676 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:26,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 03:25:26,891 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:26,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1594878741, now seen corresponding path program 37 times [2020-10-16 03:25:26,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:26,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011233361] [2020-10-16 03:25:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:26,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011233361] [2020-10-16 03:25:26,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911832622] [2020-10-16 03:25:26,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:27,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:25:27,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:27,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:27,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:27,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 03:25:27,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342760064] [2020-10-16 03:25:27,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 03:25:27,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:27,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 03:25:27,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 03:25:27,070 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:27,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 159 transitions, 3758 flow. Second operand 15 states. [2020-10-16 03:25:27,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:27,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:27,071 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:27,638 INFO L129 PetriNetUnfolder]: 149/391 cut-off events. [2020-10-16 03:25:27,638 INFO L130 PetriNetUnfolder]: For 27860/27862 co-relation queries the response was YES. [2020-10-16 03:25:27,641 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5417 conditions, 391 events. 149/391 cut-off events. For 27860/27862 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1935 event pairs, 0 based on Foata normal form. 4/395 useless extension candidates. Maximal degree in co-relation 5308. Up to 229 conditions per place. [2020-10-16 03:25:27,645 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 39 selfloop transitions, 136 changer transitions 0/182 dead transitions. [2020-10-16 03:25:27,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 182 transitions, 5194 flow [2020-10-16 03:25:27,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 03:25:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 03:25:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1553 transitions. [2020-10-16 03:25:27,651 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752173913043479 [2020-10-16 03:25:27,651 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1553 transitions. [2020-10-16 03:25:27,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1553 transitions. [2020-10-16 03:25:27,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:27,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1553 transitions. [2020-10-16 03:25:27,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 03:25:27,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 03:25:27,659 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 03:25:27,659 INFO L185 Difference]: Start difference. First operand has 239 places, 159 transitions, 3758 flow. Second operand 23 states and 1553 transitions. [2020-10-16 03:25:27,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 182 transitions, 5194 flow [2020-10-16 03:25:27,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 182 transitions, 4841 flow, removed 61 selfloop flow, removed 19 redundant places. [2020-10-16 03:25:27,771 INFO L241 Difference]: Finished difference. Result has 244 places, 163 transitions, 3902 flow [2020-10-16 03:25:27,772 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3902, PETRI_PLACES=244, PETRI_TRANSITIONS=163} [2020-10-16 03:25:27,772 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 226 predicate places. [2020-10-16 03:25:27,772 INFO L481 AbstractCegarLoop]: Abstraction has has 244 places, 163 transitions, 3902 flow [2020-10-16 03:25:27,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 03:25:27,772 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:27,772 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:27,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 03:25:27,979 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:27,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1594388631, now seen corresponding path program 38 times [2020-10-16 03:25:27,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:27,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125363074] [2020-10-16 03:25:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:28,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125363074] [2020-10-16 03:25:28,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461214489] [2020-10-16 03:25:28,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:28,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:28,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:28,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:25:28,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:28,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:28,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 03:25:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428172082] [2020-10-16 03:25:28,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:25:28,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:25:28,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:25:28,169 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:28,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 163 transitions, 3902 flow. Second operand 14 states. [2020-10-16 03:25:28,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:28,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:28,170 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:28,722 INFO L129 PetriNetUnfolder]: 160/417 cut-off events. [2020-10-16 03:25:28,722 INFO L130 PetriNetUnfolder]: For 30206/30212 co-relation queries the response was YES. [2020-10-16 03:25:28,727 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5916 conditions, 417 events. 160/417 cut-off events. For 30206/30212 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2062 event pairs, 0 based on Foata normal form. 5/422 useless extension candidates. Maximal degree in co-relation 5805. Up to 247 conditions per place. [2020-10-16 03:25:28,733 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 151 changer transitions 0/193 dead transitions. [2020-10-16 03:25:28,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 193 transitions, 5706 flow [2020-10-16 03:25:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 03:25:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 03:25:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1622 transitions. [2020-10-16 03:25:28,736 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 03:25:28,736 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1622 transitions. [2020-10-16 03:25:28,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1622 transitions. [2020-10-16 03:25:28,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:28,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1622 transitions. [2020-10-16 03:25:28,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 03:25:28,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 03:25:28,743 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 03:25:28,743 INFO L185 Difference]: Start difference. First operand has 244 places, 163 transitions, 3902 flow. Second operand 24 states and 1622 transitions. [2020-10-16 03:25:28,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 193 transitions, 5706 flow [2020-10-16 03:25:28,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 193 transitions, 5327 flow, removed 72 selfloop flow, removed 20 redundant places. [2020-10-16 03:25:28,851 INFO L241 Difference]: Finished difference. Result has 251 places, 171 transitions, 4272 flow [2020-10-16 03:25:28,852 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3583, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4272, PETRI_PLACES=251, PETRI_TRANSITIONS=171} [2020-10-16 03:25:28,852 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 233 predicate places. [2020-10-16 03:25:28,852 INFO L481 AbstractCegarLoop]: Abstraction has has 251 places, 171 transitions, 4272 flow [2020-10-16 03:25:28,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:25:28,852 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:28,852 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:29,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 03:25:29,067 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:29,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:29,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1723642493, now seen corresponding path program 39 times [2020-10-16 03:25:29,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:29,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890491522] [2020-10-16 03:25:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:29,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890491522] [2020-10-16 03:25:29,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015329004] [2020-10-16 03:25:29,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:29,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 03:25:29,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:25:29,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:29,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:29,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:29,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 03:25:29,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689364157] [2020-10-16 03:25:29,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 03:25:29,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:29,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 03:25:29,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 03:25:29,249 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:29,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 171 transitions, 4272 flow. Second operand 15 states. [2020-10-16 03:25:29,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:29,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:29,250 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:29,872 INFO L129 PetriNetUnfolder]: 157/410 cut-off events. [2020-10-16 03:25:29,872 INFO L130 PetriNetUnfolder]: For 33246/33248 co-relation queries the response was YES. [2020-10-16 03:25:29,876 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6005 conditions, 410 events. 157/410 cut-off events. For 33246/33248 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2059 event pairs, 0 based on Foata normal form. 4/414 useless extension candidates. Maximal degree in co-relation 5890. Up to 243 conditions per place. [2020-10-16 03:25:29,882 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 32 selfloop transitions, 154 changer transitions 0/193 dead transitions. [2020-10-16 03:25:29,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 193 transitions, 5810 flow [2020-10-16 03:25:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 03:25:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 03:25:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1689 transitions. [2020-10-16 03:25:29,886 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6756 [2020-10-16 03:25:29,886 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1689 transitions. [2020-10-16 03:25:29,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1689 transitions. [2020-10-16 03:25:29,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:29,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1689 transitions. [2020-10-16 03:25:29,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 03:25:29,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 03:25:29,890 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 03:25:29,890 INFO L185 Difference]: Start difference. First operand has 251 places, 171 transitions, 4272 flow. Second operand 25 states and 1689 transitions. [2020-10-16 03:25:29,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 193 transitions, 5810 flow [2020-10-16 03:25:30,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 193 transitions, 5341 flow, removed 115 selfloop flow, removed 18 redundant places. [2020-10-16 03:25:30,026 INFO L241 Difference]: Finished difference. Result has 259 places, 172 transitions, 4224 flow [2020-10-16 03:25:30,026 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4224, PETRI_PLACES=259, PETRI_TRANSITIONS=172} [2020-10-16 03:25:30,027 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 241 predicate places. [2020-10-16 03:25:30,027 INFO L481 AbstractCegarLoop]: Abstraction has has 259 places, 172 transitions, 4224 flow [2020-10-16 03:25:30,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 03:25:30,027 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:30,027 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:30,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 03:25:30,235 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:30,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1991622277, now seen corresponding path program 40 times [2020-10-16 03:25:30,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:30,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28237605] [2020-10-16 03:25:30,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:30,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28237605] [2020-10-16 03:25:30,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387963781] [2020-10-16 03:25:30,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:30,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:25:30,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:30,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:25:30,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:30,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:25:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:30,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:30,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 03:25:30,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627656029] [2020-10-16 03:25:30,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 03:25:30,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:30,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 03:25:30,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 03:25:30,415 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:30,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 172 transitions, 4224 flow. Second operand 15 states. [2020-10-16 03:25:30,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:30,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:30,416 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:31,034 INFO L129 PetriNetUnfolder]: 160/415 cut-off events. [2020-10-16 03:25:31,035 INFO L130 PetriNetUnfolder]: For 35098/35100 co-relation queries the response was YES. [2020-10-16 03:25:31,038 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6116 conditions, 415 events. 160/415 cut-off events. For 35098/35100 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2076 event pairs, 0 based on Foata normal form. 3/418 useless extension candidates. Maximal degree in co-relation 5999. Up to 243 conditions per place. [2020-10-16 03:25:31,045 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 63 selfloop transitions, 126 changer transitions 0/196 dead transitions. [2020-10-16 03:25:31,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 196 transitions, 5838 flow [2020-10-16 03:25:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 03:25:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 03:25:31,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1621 transitions. [2020-10-16 03:25:31,048 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754166666666667 [2020-10-16 03:25:31,048 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1621 transitions. [2020-10-16 03:25:31,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1621 transitions. [2020-10-16 03:25:31,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:31,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1621 transitions. [2020-10-16 03:25:31,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 03:25:31,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 03:25:31,052 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 03:25:31,052 INFO L185 Difference]: Start difference. First operand has 259 places, 172 transitions, 4224 flow. Second operand 24 states and 1621 transitions. [2020-10-16 03:25:31,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 196 transitions, 5838 flow [2020-10-16 03:25:31,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 196 transitions, 5432 flow, removed 61 selfloop flow, removed 23 redundant places. [2020-10-16 03:25:31,193 INFO L241 Difference]: Finished difference. Result has 261 places, 175 transitions, 4320 flow [2020-10-16 03:25:31,193 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4320, PETRI_PLACES=261, PETRI_TRANSITIONS=175} [2020-10-16 03:25:31,193 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 243 predicate places. [2020-10-16 03:25:31,193 INFO L481 AbstractCegarLoop]: Abstraction has has 261 places, 175 transitions, 4320 flow [2020-10-16 03:25:31,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 03:25:31,194 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:31,194 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:31,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 03:25:31,395 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:31,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1893293424, now seen corresponding path program 41 times [2020-10-16 03:25:31,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:31,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099216007] [2020-10-16 03:25:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:31,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099216007] [2020-10-16 03:25:31,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061322678] [2020-10-16 03:25:31,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:31,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 03:25:31,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:31,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 03:25:31,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:31,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:25:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:31,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:31,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 03:25:31,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778222339] [2020-10-16 03:25:31,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 03:25:31,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:31,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 03:25:31,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-16 03:25:31,585 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:31,586 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 175 transitions, 4320 flow. Second operand 16 states. [2020-10-16 03:25:31,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:31,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:31,586 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:32,208 INFO L129 PetriNetUnfolder]: 163/423 cut-off events. [2020-10-16 03:25:32,209 INFO L130 PetriNetUnfolder]: For 33867/33869 co-relation queries the response was YES. [2020-10-16 03:25:32,213 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 03:25:32,217 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 158 changer transitions 0/200 dead transitions. [2020-10-16 03:25:32,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 200 transitions, 6018 flow [2020-10-16 03:25:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 03:25:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 03:25:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1621 transitions. [2020-10-16 03:25:32,219 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754166666666667 [2020-10-16 03:25:32,219 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1621 transitions. [2020-10-16 03:25:32,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1621 transitions. [2020-10-16 03:25:32,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:32,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1621 transitions. [2020-10-16 03:25:32,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 03:25:32,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 03:25:32,223 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 03:25:32,223 INFO L185 Difference]: Start difference. First operand has 261 places, 175 transitions, 4320 flow. Second operand 24 states and 1621 transitions. [2020-10-16 03:25:32,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 200 transitions, 6018 flow [2020-10-16 03:25:32,323 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 03:25:32,327 INFO L241 Difference]: Finished difference. Result has 267 places, 178 transitions, 4550 flow [2020-10-16 03:25:32,327 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 03:25:32,328 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 249 predicate places. [2020-10-16 03:25:32,328 INFO L481 AbstractCegarLoop]: Abstraction has has 267 places, 178 transitions, 4550 flow [2020-10-16 03:25:32,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 03:25:32,328 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:32,328 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:32,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:32,529 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 42 times [2020-10-16 03:25:32,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:32,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288293940] [2020-10-16 03:25:32,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:32,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288293940] [2020-10-16 03:25:32,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410489664] [2020-10-16 03:25:32,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:32,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 03:25:32,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 03:25:32,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:32,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:32,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 03:25:32,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747230710] [2020-10-16 03:25:32,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 03:25:32,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:32,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 03:25:32,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 03:25:32,746 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:32,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 178 transitions, 4550 flow. Second operand 15 states. [2020-10-16 03:25:32,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:32,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:32,747 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:33,083 INFO L129 PetriNetUnfolder]: 165/429 cut-off events. [2020-10-16 03:25:33,084 INFO L130 PetriNetUnfolder]: For 37209/37211 co-relation queries the response was YES. [2020-10-16 03:25:33,088 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 03:25:33,092 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 163 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2020-10-16 03:25:33,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 193 transitions, 5752 flow [2020-10-16 03:25:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:25:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:25:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1076 transitions. [2020-10-16 03:25:33,093 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6725 [2020-10-16 03:25:33,093 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1076 transitions. [2020-10-16 03:25:33,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1076 transitions. [2020-10-16 03:25:33,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:33,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1076 transitions. [2020-10-16 03:25:33,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:25:33,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:25:33,095 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:25:33,095 INFO L185 Difference]: Start difference. First operand has 267 places, 178 transitions, 4550 flow. Second operand 16 states and 1076 transitions. [2020-10-16 03:25:33,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 193 transitions, 5752 flow [2020-10-16 03:25:33,206 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 03:25:33,210 INFO L241 Difference]: Finished difference. Result has 263 places, 180 transitions, 4332 flow [2020-10-16 03:25:33,211 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 03:25:33,211 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 245 predicate places. [2020-10-16 03:25:33,211 INFO L481 AbstractCegarLoop]: Abstraction has has 263 places, 180 transitions, 4332 flow [2020-10-16 03:25:33,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 03:25:33,211 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:33,211 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:33,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 03:25:33,418 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:33,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:33,419 INFO L82 PathProgramCache]: Analyzing trace with hash -947943161, now seen corresponding path program 43 times [2020-10-16 03:25:33,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:33,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365309569] [2020-10-16 03:25:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:33,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365309569] [2020-10-16 03:25:33,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261212058] [2020-10-16 03:25:33,567 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 03:25:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:33,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 03:25:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:33,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:33,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:33,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 03:25:33,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911808041] [2020-10-16 03:25:33,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 03:25:33,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 03:25:33,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 03:25:33,646 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:33,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 180 transitions, 4332 flow. Second operand 16 states. [2020-10-16 03:25:33,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:33,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:33,647 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:34,084 INFO L129 PetriNetUnfolder]: 169/441 cut-off events. [2020-10-16 03:25:34,085 INFO L130 PetriNetUnfolder]: For 41099/41101 co-relation queries the response was YES. [2020-10-16 03:25:34,089 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 03:25:34,094 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 132 selfloop transitions, 60 changer transitions 0/199 dead transitions. [2020-10-16 03:25:34,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 199 transitions, 5760 flow [2020-10-16 03:25:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 03:25:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 03:25:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1280 transitions. [2020-10-16 03:25:34,096 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6736842105263158 [2020-10-16 03:25:34,096 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1280 transitions. [2020-10-16 03:25:34,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1280 transitions. [2020-10-16 03:25:34,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:34,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1280 transitions. [2020-10-16 03:25:34,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 03:25:34,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 03:25:34,099 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 03:25:34,099 INFO L185 Difference]: Start difference. First operand has 263 places, 180 transitions, 4332 flow. Second operand 19 states and 1280 transitions. [2020-10-16 03:25:34,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 199 transitions, 5760 flow [2020-10-16 03:25:34,220 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 03:25:34,224 INFO L241 Difference]: Finished difference. Result has 270 places, 184 transitions, 4526 flow [2020-10-16 03:25:34,225 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 03:25:34,225 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 252 predicate places. [2020-10-16 03:25:34,225 INFO L481 AbstractCegarLoop]: Abstraction has has 270 places, 184 transitions, 4526 flow [2020-10-16 03:25:34,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 03:25:34,225 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:34,225 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:34,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:34,426 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:34,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1594171721, now seen corresponding path program 44 times [2020-10-16 03:25:34,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:34,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881171762] [2020-10-16 03:25:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:34,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881171762] [2020-10-16 03:25:34,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255452277] [2020-10-16 03:25:34,542 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 03:25:34,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:34,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:34,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 03:25:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:34,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:34,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 03:25:34,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940524186] [2020-10-16 03:25:34,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 03:25:34,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:34,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 03:25:34,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 03:25:34,619 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:34,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 184 transitions, 4526 flow. Second operand 15 states. [2020-10-16 03:25:34,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:34,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:34,620 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:35,146 INFO L129 PetriNetUnfolder]: 175/458 cut-off events. [2020-10-16 03:25:35,146 INFO L130 PetriNetUnfolder]: For 44489/44491 co-relation queries the response was YES. [2020-10-16 03:25:35,151 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 03:25:35,155 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 68 selfloop transitions, 138 changer transitions 0/213 dead transitions. [2020-10-16 03:25:35,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 213 transitions, 6441 flow [2020-10-16 03:25:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 03:25:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 03:25:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1755 transitions. [2020-10-16 03:25:35,157 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:25:35,157 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1755 transitions. [2020-10-16 03:25:35,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1755 transitions. [2020-10-16 03:25:35,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:35,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1755 transitions. [2020-10-16 03:25:35,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 03:25:35,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 03:25:35,162 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 03:25:35,162 INFO L185 Difference]: Start difference. First operand has 270 places, 184 transitions, 4526 flow. Second operand 26 states and 1755 transitions. [2020-10-16 03:25:35,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 213 transitions, 6441 flow [2020-10-16 03:25:35,354 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 03:25:35,358 INFO L241 Difference]: Finished difference. Result has 283 places, 192 transitions, 4955 flow [2020-10-16 03:25:35,359 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 03:25:35,359 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 265 predicate places. [2020-10-16 03:25:35,359 INFO L481 AbstractCegarLoop]: Abstraction has has 283 places, 192 transitions, 4955 flow [2020-10-16 03:25:35,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 03:25:35,359 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:35,359 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:35,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 03:25:35,560 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:35,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1610748971, now seen corresponding path program 45 times [2020-10-16 03:25:35,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:35,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628280640] [2020-10-16 03:25:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:35,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628280640] [2020-10-16 03:25:35,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732610859] [2020-10-16 03:25:35,672 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 03:25:35,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 03:25:35,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:35,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 03:25:35,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:35,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:35,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 03:25:35,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985208670] [2020-10-16 03:25:35,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 03:25:35,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:35,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 03:25:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 03:25:35,745 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:35,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 192 transitions, 4955 flow. Second operand 15 states. [2020-10-16 03:25:35,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:35,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:35,746 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:36,350 INFO L129 PetriNetUnfolder]: 184/480 cut-off events. [2020-10-16 03:25:36,350 INFO L130 PetriNetUnfolder]: For 48919/48925 co-relation queries the response was YES. [2020-10-16 03:25:36,356 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 03:25:36,360 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 57 selfloop transitions, 158 changer transitions 0/222 dead transitions. [2020-10-16 03:25:36,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 222 transitions, 7145 flow [2020-10-16 03:25:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 03:25:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 03:25:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1892 transitions. [2020-10-16 03:25:36,363 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757142857142857 [2020-10-16 03:25:36,363 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1892 transitions. [2020-10-16 03:25:36,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1892 transitions. [2020-10-16 03:25:36,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:36,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1892 transitions. [2020-10-16 03:25:36,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-16 03:25:36,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-16 03:25:36,366 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-16 03:25:36,366 INFO L185 Difference]: Start difference. First operand has 283 places, 192 transitions, 4955 flow. Second operand 28 states and 1892 transitions. [2020-10-16 03:25:36,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 222 transitions, 7145 flow [2020-10-16 03:25:36,503 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 03:25:36,508 INFO L241 Difference]: Finished difference. Result has 294 places, 198 transitions, 5298 flow [2020-10-16 03:25:36,508 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 03:25:36,508 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 276 predicate places. [2020-10-16 03:25:36,508 INFO L481 AbstractCegarLoop]: Abstraction has has 294 places, 198 transitions, 5298 flow [2020-10-16 03:25:36,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 03:25:36,509 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:36,509 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:36,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:36,717 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:36,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1610765711, now seen corresponding path program 46 times [2020-10-16 03:25:36,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:36,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005488118] [2020-10-16 03:25:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:36,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005488118] [2020-10-16 03:25:36,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145708480] [2020-10-16 03:25:36,829 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 03:25:36,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:25:36,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:36,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 03:25:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:36,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:25:36,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:36,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 03:25:36,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607715769] [2020-10-16 03:25:36,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 03:25:36,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:36,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 03:25:36,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 03:25:36,908 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:36,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 198 transitions, 5298 flow. Second operand 16 states. [2020-10-16 03:25:36,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:36,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:36,908 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:37,596 INFO L129 PetriNetUnfolder]: 181/473 cut-off events. [2020-10-16 03:25:37,597 INFO L130 PetriNetUnfolder]: For 54557/54559 co-relation queries the response was YES. [2020-10-16 03:25:37,601 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 03:25:37,605 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 57 selfloop transitions, 158 changer transitions 0/222 dead transitions. [2020-10-16 03:25:37,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 222 transitions, 7250 flow [2020-10-16 03:25:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 03:25:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-16 03:25:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1824 transitions. [2020-10-16 03:25:37,607 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2020-10-16 03:25:37,607 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1824 transitions. [2020-10-16 03:25:37,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1824 transitions. [2020-10-16 03:25:37,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:37,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1824 transitions. [2020-10-16 03:25:37,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-16 03:25:37,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-16 03:25:37,610 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-16 03:25:37,610 INFO L185 Difference]: Start difference. First operand has 294 places, 198 transitions, 5298 flow. Second operand 27 states and 1824 transitions. [2020-10-16 03:25:37,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 222 transitions, 7250 flow [2020-10-16 03:25:37,758 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 03:25:37,763 INFO L241 Difference]: Finished difference. Result has 300 places, 199 transitions, 5224 flow [2020-10-16 03:25:37,763 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 03:25:37,763 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 282 predicate places. [2020-10-16 03:25:37,764 INFO L481 AbstractCegarLoop]: Abstraction has has 300 places, 199 transitions, 5224 flow [2020-10-16 03:25:37,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 03:25:37,764 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:37,764 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:37,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 03:25:37,965 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:37,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1746167786, now seen corresponding path program 47 times [2020-10-16 03:25:37,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:37,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935095694] [2020-10-16 03:25:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:38,115 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 03:25:38,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935095694] [2020-10-16 03:25:38,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834748861] [2020-10-16 03:25:38,116 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 03:25:38,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 03:25:38,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:38,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 03:25:38,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:38,181 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 03:25:38,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:38,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 03:25:38,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430045929] [2020-10-16 03:25:38,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 03:25:38,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:38,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 03:25:38,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 03:25:38,184 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:38,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 199 transitions, 5224 flow. Second operand 16 states. [2020-10-16 03:25:38,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:38,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:38,185 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:38,571 INFO L129 PetriNetUnfolder]: 183/479 cut-off events. [2020-10-16 03:25:38,572 INFO L130 PetriNetUnfolder]: For 55132/55138 co-relation queries the response was YES. [2020-10-16 03:25:38,576 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 03:25:38,580 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 159 selfloop transitions, 50 changer transitions 0/216 dead transitions. [2020-10-16 03:25:38,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 216 transitions, 6708 flow [2020-10-16 03:25:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 03:25:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-16 03:25:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1211 transitions. [2020-10-16 03:25:38,584 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6727777777777778 [2020-10-16 03:25:38,584 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1211 transitions. [2020-10-16 03:25:38,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1211 transitions. [2020-10-16 03:25:38,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:38,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1211 transitions. [2020-10-16 03:25:38,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-16 03:25:38,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-16 03:25:38,586 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-16 03:25:38,586 INFO L185 Difference]: Start difference. First operand has 300 places, 199 transitions, 5224 flow. Second operand 18 states and 1211 transitions. [2020-10-16 03:25:38,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 216 transitions, 6708 flow [2020-10-16 03:25:38,729 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 03:25:38,734 INFO L241 Difference]: Finished difference. Result has 296 places, 201 transitions, 5142 flow [2020-10-16 03:25:38,734 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 03:25:38,734 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 278 predicate places. [2020-10-16 03:25:38,734 INFO L481 AbstractCegarLoop]: Abstraction has has 296 places, 201 transitions, 5142 flow [2020-10-16 03:25:38,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 03:25:38,734 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:38,735 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:38,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 03:25:38,935 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:38,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1446248666, now seen corresponding path program 48 times [2020-10-16 03:25:38,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:38,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033883285] [2020-10-16 03:25:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:39,078 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 03:25:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033883285] [2020-10-16 03:25:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531817483] [2020-10-16 03:25:39,079 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 03:25:39,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 03:25:39,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:39,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 03:25:39,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:39,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:39,164 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 03:25:39,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:39,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 03:25:39,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787359011] [2020-10-16 03:25:39,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 03:25:39,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:39,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 03:25:39,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 03:25:39,169 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:39,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 201 transitions, 5142 flow. Second operand 17 states. [2020-10-16 03:25:39,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:39,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:39,170 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:39,698 INFO L129 PetriNetUnfolder]: 185/485 cut-off events. [2020-10-16 03:25:39,698 INFO L130 PetriNetUnfolder]: For 54213/54215 co-relation queries the response was YES. [2020-10-16 03:25:39,703 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 03:25:39,707 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 111 selfloop transitions, 102 changer transitions 0/220 dead transitions. [2020-10-16 03:25:39,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 220 transitions, 6742 flow [2020-10-16 03:25:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 03:25:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 03:25:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1415 transitions. [2020-10-16 03:25:39,709 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6738095238095239 [2020-10-16 03:25:39,709 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1415 transitions. [2020-10-16 03:25:39,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1415 transitions. [2020-10-16 03:25:39,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:39,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1415 transitions. [2020-10-16 03:25:39,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 03:25:39,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 03:25:39,712 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 03:25:39,712 INFO L185 Difference]: Start difference. First operand has 296 places, 201 transitions, 5142 flow. Second operand 21 states and 1415 transitions. [2020-10-16 03:25:39,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 220 transitions, 6742 flow [2020-10-16 03:25:39,854 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 03:25:39,859 INFO L241 Difference]: Finished difference. Result has 303 places, 203 transitions, 5306 flow [2020-10-16 03:25:39,859 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 03:25:39,860 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 285 predicate places. [2020-10-16 03:25:39,860 INFO L481 AbstractCegarLoop]: Abstraction has has 303 places, 203 transitions, 5306 flow [2020-10-16 03:25:39,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 03:25:39,860 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:39,860 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:40,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 03:25:40,067 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:40,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:40,067 INFO L82 PathProgramCache]: Analyzing trace with hash 169943844, now seen corresponding path program 49 times [2020-10-16 03:25:40,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:40,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197040740] [2020-10-16 03:25:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:40,206 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 03:25:40,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197040740] [2020-10-16 03:25:40,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050671310] [2020-10-16 03:25:40,207 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 03:25:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:40,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 03:25:40,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:40,266 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 03:25:40,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:40,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 03:25:40,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793144577] [2020-10-16 03:25:40,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 03:25:40,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 03:25:40,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 03:25:40,269 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:40,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 203 transitions, 5306 flow. Second operand 16 states. [2020-10-16 03:25:40,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:40,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:40,270 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:40,784 INFO L129 PetriNetUnfolder]: 197/521 cut-off events. [2020-10-16 03:25:40,784 INFO L130 PetriNetUnfolder]: For 60492/60498 co-relation queries the response was YES. [2020-10-16 03:25:40,788 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 03:25:40,793 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 98 selfloop transitions, 130 changer transitions 0/235 dead transitions. [2020-10-16 03:25:40,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 235 transitions, 7435 flow [2020-10-16 03:25:40,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 03:25:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 03:25:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1483 transitions. [2020-10-16 03:25:40,795 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6740909090909091 [2020-10-16 03:25:40,795 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1483 transitions. [2020-10-16 03:25:40,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1483 transitions. [2020-10-16 03:25:40,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:40,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1483 transitions. [2020-10-16 03:25:40,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 03:25:40,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 03:25:40,799 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 03:25:40,799 INFO L185 Difference]: Start difference. First operand has 303 places, 203 transitions, 5306 flow. Second operand 22 states and 1483 transitions. [2020-10-16 03:25:40,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 235 transitions, 7435 flow [2020-10-16 03:25:41,034 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 03:25:41,040 INFO L241 Difference]: Finished difference. Result has 315 places, 216 transitions, 5917 flow [2020-10-16 03:25:41,041 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 03:25:41,041 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 297 predicate places. [2020-10-16 03:25:41,041 INFO L481 AbstractCegarLoop]: Abstraction has has 315 places, 216 transitions, 5917 flow [2020-10-16 03:25:41,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 03:25:41,041 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:41,041 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:41,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-16 03:25:41,256 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash 689686920, now seen corresponding path program 50 times [2020-10-16 03:25:41,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:41,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819547622] [2020-10-16 03:25:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:41,398 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 03:25:41,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819547622] [2020-10-16 03:25:41,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147918012] [2020-10-16 03:25:41,399 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 03:25:41,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:41,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:41,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 03:25:41,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:41,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:41,487 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 03:25:41,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:41,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 03:25:41,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293991140] [2020-10-16 03:25:41,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 03:25:41,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:41,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 03:25:41,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 03:25:41,489 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:41,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 216 transitions, 5917 flow. Second operand 17 states. [2020-10-16 03:25:41,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:41,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:41,490 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:42,110 INFO L129 PetriNetUnfolder]: 205/545 cut-off events. [2020-10-16 03:25:42,110 INFO L130 PetriNetUnfolder]: For 65482/65488 co-relation queries the response was YES. [2020-10-16 03:25:42,116 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 03:25:42,121 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 92 selfloop transitions, 144 changer transitions 0/243 dead transitions. [2020-10-16 03:25:42,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 243 transitions, 7917 flow [2020-10-16 03:25:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 03:25:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 03:25:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1551 transitions. [2020-10-16 03:25:42,123 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743478260869565 [2020-10-16 03:25:42,123 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1551 transitions. [2020-10-16 03:25:42,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1551 transitions. [2020-10-16 03:25:42,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:42,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1551 transitions. [2020-10-16 03:25:42,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 03:25:42,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 03:25:42,126 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 03:25:42,126 INFO L185 Difference]: Start difference. First operand has 315 places, 216 transitions, 5917 flow. Second operand 23 states and 1551 transitions. [2020-10-16 03:25:42,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 243 transitions, 7917 flow [2020-10-16 03:25:42,322 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 03:25:42,328 INFO L241 Difference]: Finished difference. Result has 328 places, 224 transitions, 6279 flow [2020-10-16 03:25:42,328 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 03:25:42,329 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 310 predicate places. [2020-10-16 03:25:42,329 INFO L481 AbstractCegarLoop]: Abstraction has has 328 places, 224 transitions, 6279 flow [2020-10-16 03:25:42,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 03:25:42,329 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:42,329 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:42,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:42,530 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:42,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1624966084, now seen corresponding path program 51 times [2020-10-16 03:25:42,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:42,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637786309] [2020-10-16 03:25:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:42,656 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 03:25:42,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637786309] [2020-10-16 03:25:42,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100092286] [2020-10-16 03:25:42,657 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 03:25:42,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 03:25:42,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:42,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 03:25:42,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:42,722 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 03:25:42,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:42,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 03:25:42,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815251984] [2020-10-16 03:25:42,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 03:25:42,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:42,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 03:25:42,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 03:25:42,725 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:42,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 224 transitions, 6279 flow. Second operand 16 states. [2020-10-16 03:25:42,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:42,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:42,726 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:43,286 INFO L129 PetriNetUnfolder]: 209/556 cut-off events. [2020-10-16 03:25:43,286 INFO L130 PetriNetUnfolder]: For 68666/68668 co-relation queries the response was YES. [2020-10-16 03:25:43,293 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 03:25:43,298 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 74 selfloop transitions, 168 changer transitions 0/249 dead transitions. [2020-10-16 03:25:43,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 249 transitions, 8310 flow [2020-10-16 03:25:43,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 03:25:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 03:25:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1619 transitions. [2020-10-16 03:25:43,301 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745833333333333 [2020-10-16 03:25:43,301 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1619 transitions. [2020-10-16 03:25:43,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1619 transitions. [2020-10-16 03:25:43,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:43,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1619 transitions. [2020-10-16 03:25:43,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 03:25:43,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 03:25:43,304 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 03:25:43,304 INFO L185 Difference]: Start difference. First operand has 328 places, 224 transitions, 6279 flow. Second operand 24 states and 1619 transitions. [2020-10-16 03:25:43,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 249 transitions, 8310 flow [2020-10-16 03:25:43,530 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 03:25:43,536 INFO L241 Difference]: Finished difference. Result has 335 places, 228 transitions, 6506 flow [2020-10-16 03:25:43,536 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 03:25:43,536 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 317 predicate places. [2020-10-16 03:25:43,536 INFO L481 AbstractCegarLoop]: Abstraction has has 335 places, 228 transitions, 6506 flow [2020-10-16 03:25:43,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 03:25:43,536 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:43,536 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:43,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:43,737 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:43,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1112460206, now seen corresponding path program 52 times [2020-10-16 03:25:43,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:43,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312100945] [2020-10-16 03:25:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:43,868 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 03:25:43,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312100945] [2020-10-16 03:25:43,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134351299] [2020-10-16 03:25:43,869 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 03:25:43,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:25:43,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:43,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 03:25:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:43,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:43,972 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 03:25:43,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:43,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 03:25:43,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580588838] [2020-10-16 03:25:43,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 03:25:43,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:43,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 03:25:43,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 03:25:43,974 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:43,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 228 transitions, 6506 flow. Second operand 17 states. [2020-10-16 03:25:43,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:43,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:43,975 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:44,809 INFO L129 PetriNetUnfolder]: 213/566 cut-off events. [2020-10-16 03:25:44,809 INFO L130 PetriNetUnfolder]: For 67902/67904 co-relation queries the response was YES. [2020-10-16 03:25:44,815 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 03:25:44,820 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 40 selfloop transitions, 210 changer transitions 0/257 dead transitions. [2020-10-16 03:25:44,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 257 transitions, 8834 flow [2020-10-16 03:25:44,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 03:25:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-16 03:25:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1959 transitions. [2020-10-16 03:25:44,822 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755172413793104 [2020-10-16 03:25:44,822 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1959 transitions. [2020-10-16 03:25:44,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1959 transitions. [2020-10-16 03:25:44,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:44,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1959 transitions. [2020-10-16 03:25:44,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-16 03:25:44,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-16 03:25:44,827 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-16 03:25:44,827 INFO L185 Difference]: Start difference. First operand has 335 places, 228 transitions, 6506 flow. Second operand 29 states and 1959 transitions. [2020-10-16 03:25:44,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 257 transitions, 8834 flow [2020-10-16 03:25:45,059 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 03:25:45,071 INFO L241 Difference]: Finished difference. Result has 345 places, 232 transitions, 6832 flow [2020-10-16 03:25:45,071 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 03:25:45,071 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 327 predicate places. [2020-10-16 03:25:45,072 INFO L481 AbstractCegarLoop]: Abstraction has has 345 places, 232 transitions, 6832 flow [2020-10-16 03:25:45,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 03:25:45,072 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:45,072 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:45,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 03:25:45,286 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:45,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:45,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1605854204, now seen corresponding path program 53 times [2020-10-16 03:25:45,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:45,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383919930] [2020-10-16 03:25:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:45,406 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 03:25:45,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383919930] [2020-10-16 03:25:45,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160146690] [2020-10-16 03:25:45,407 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 03:25:45,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 03:25:45,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:45,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 03:25:45,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:45,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:25:45,492 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 03:25:45,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:45,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 03:25:45,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683292227] [2020-10-16 03:25:45,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 03:25:45,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:45,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 03:25:45,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 03:25:45,495 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:45,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 232 transitions, 6832 flow. Second operand 17 states. [2020-10-16 03:25:45,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:45,496 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:45,496 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:46,319 INFO L129 PetriNetUnfolder]: 216/571 cut-off events. [2020-10-16 03:25:46,319 INFO L130 PetriNetUnfolder]: For 70409/70411 co-relation queries the response was YES. [2020-10-16 03:25:46,325 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 03:25:46,330 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 74 selfloop transitions, 178 changer transitions 0/259 dead transitions. [2020-10-16 03:25:46,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 259 transitions, 9078 flow [2020-10-16 03:25:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 03:25:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 03:25:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1891 transitions. [2020-10-16 03:25:46,332 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753571428571429 [2020-10-16 03:25:46,333 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1891 transitions. [2020-10-16 03:25:46,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1891 transitions. [2020-10-16 03:25:46,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:46,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1891 transitions. [2020-10-16 03:25:46,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-16 03:25:46,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-16 03:25:46,337 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-16 03:25:46,337 INFO L185 Difference]: Start difference. First operand has 345 places, 232 transitions, 6832 flow. Second operand 28 states and 1891 transitions. [2020-10-16 03:25:46,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 259 transitions, 9078 flow [2020-10-16 03:25:46,576 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 03:25:46,582 INFO L241 Difference]: Finished difference. Result has 349 places, 235 transitions, 6896 flow [2020-10-16 03:25:46,582 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 03:25:46,583 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 331 predicate places. [2020-10-16 03:25:46,583 INFO L481 AbstractCegarLoop]: Abstraction has has 349 places, 235 transitions, 6896 flow [2020-10-16 03:25:46,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 03:25:46,583 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:46,583 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:46,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:46,796 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:46,796 INFO L82 PathProgramCache]: Analyzing trace with hash 126544325, now seen corresponding path program 54 times [2020-10-16 03:25:46,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:46,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480069514] [2020-10-16 03:25:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:46,920 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 03:25:46,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480069514] [2020-10-16 03:25:46,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221883234] [2020-10-16 03:25:46,920 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 03:25:46,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 03:25:46,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:46,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 03:25:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:46,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:25:47,010 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 03:25:47,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:47,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 03:25:47,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841739023] [2020-10-16 03:25:47,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 03:25:47,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:47,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 03:25:47,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-16 03:25:47,013 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:47,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 235 transitions, 6896 flow. Second operand 18 states. [2020-10-16 03:25:47,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:47,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:47,014 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:47,846 INFO L129 PetriNetUnfolder]: 219/579 cut-off events. [2020-10-16 03:25:47,846 INFO L130 PetriNetUnfolder]: For 73304/73306 co-relation queries the response was YES. [2020-10-16 03:25:47,854 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 03:25:47,859 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 43 selfloop transitions, 214 changer transitions 0/264 dead transitions. [2020-10-16 03:25:47,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 264 transitions, 9306 flow [2020-10-16 03:25:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 03:25:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 03:25:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1891 transitions. [2020-10-16 03:25:47,861 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753571428571429 [2020-10-16 03:25:47,861 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1891 transitions. [2020-10-16 03:25:47,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1891 transitions. [2020-10-16 03:25:47,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:47,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1891 transitions. [2020-10-16 03:25:47,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-16 03:25:47,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-16 03:25:47,864 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-16 03:25:47,864 INFO L185 Difference]: Start difference. First operand has 349 places, 235 transitions, 6896 flow. Second operand 28 states and 1891 transitions. [2020-10-16 03:25:47,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 264 transitions, 9306 flow [2020-10-16 03:25:48,163 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 03:25:48,169 INFO L241 Difference]: Finished difference. Result has 353 places, 238 transitions, 7118 flow [2020-10-16 03:25:48,169 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 03:25:48,169 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 335 predicate places. [2020-10-16 03:25:48,169 INFO L481 AbstractCegarLoop]: Abstraction has has 353 places, 238 transitions, 7118 flow [2020-10-16 03:25:48,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 03:25:48,169 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:48,170 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:48,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 03:25:48,370 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:48,371 INFO L82 PathProgramCache]: Analyzing trace with hash 935082962, now seen corresponding path program 55 times [2020-10-16 03:25:48,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:48,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185422899] [2020-10-16 03:25:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:48,546 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 03:25:48,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185422899] [2020-10-16 03:25:48,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973891380] [2020-10-16 03:25:48,547 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 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 03:25:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 03:25:48,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:48,605 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 03:25:48,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:48,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 03:25:48,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312036216] [2020-10-16 03:25:48,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 03:25:48,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:48,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 03:25:48,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 03:25:48,608 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:48,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 238 transitions, 7118 flow. Second operand 17 states. [2020-10-16 03:25:48,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:48,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:48,609 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:49,135 INFO L129 PetriNetUnfolder]: 221/585 cut-off events. [2020-10-16 03:25:49,135 INFO L130 PetriNetUnfolder]: For 76678/76684 co-relation queries the response was YES. [2020-10-16 03:25:49,142 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 03:25:49,147 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 223 selfloop transitions, 25 changer transitions 0/255 dead transitions. [2020-10-16 03:25:49,147 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 255 transitions, 8760 flow [2020-10-16 03:25:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 03:25:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-16 03:25:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1210 transitions. [2020-10-16 03:25:49,148 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2020-10-16 03:25:49,148 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1210 transitions. [2020-10-16 03:25:49,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1210 transitions. [2020-10-16 03:25:49,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:49,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1210 transitions. [2020-10-16 03:25:49,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-16 03:25:49,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-16 03:25:49,151 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-16 03:25:49,151 INFO L185 Difference]: Start difference. First operand has 353 places, 238 transitions, 7118 flow. Second operand 18 states and 1210 transitions. [2020-10-16 03:25:49,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 255 transitions, 8760 flow [2020-10-16 03:25:49,377 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 03:25:49,383 INFO L241 Difference]: Finished difference. Result has 347 places, 240 transitions, 6792 flow [2020-10-16 03:25:49,383 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 03:25:49,383 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 329 predicate places. [2020-10-16 03:25:49,384 INFO L481 AbstractCegarLoop]: Abstraction has has 347 places, 240 transitions, 6792 flow [2020-10-16 03:25:49,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 03:25:49,384 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:49,384 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:49,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 03:25:49,585 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:49,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 56 times [2020-10-16 03:25:49,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:49,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320019705] [2020-10-16 03:25:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:49,754 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 03:25:49,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320019705] [2020-10-16 03:25:49,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050755352] [2020-10-16 03:25:49,755 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 03:25:49,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:49,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:49,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 03:25:49,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:49,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:49,832 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 03:25:49,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:49,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 03:25:49,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104775697] [2020-10-16 03:25:49,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 03:25:49,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:49,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 03:25:49,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 03:25:49,834 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:49,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 240 transitions, 6792 flow. Second operand 18 states. [2020-10-16 03:25:49,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:49,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:49,835 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:50,409 INFO L129 PetriNetUnfolder]: 225/596 cut-off events. [2020-10-16 03:25:50,409 INFO L130 PetriNetUnfolder]: For 82999/83001 co-relation queries the response was YES. [2020-10-16 03:25:50,416 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 03:25:50,421 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 188 selfloop transitions, 66 changer transitions 0/261 dead transitions. [2020-10-16 03:25:50,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 261 transitions, 8705 flow [2020-10-16 03:25:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 03:25:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 03:25:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1414 transitions. [2020-10-16 03:25:50,423 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2020-10-16 03:25:50,423 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1414 transitions. [2020-10-16 03:25:50,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1414 transitions. [2020-10-16 03:25:50,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:50,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1414 transitions. [2020-10-16 03:25:50,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 03:25:50,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 03:25:50,426 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 03:25:50,426 INFO L185 Difference]: Start difference. First operand has 347 places, 240 transitions, 6792 flow. Second operand 21 states and 1414 transitions. [2020-10-16 03:25:50,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 261 transitions, 8705 flow [2020-10-16 03:25:50,659 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 03:25:50,665 INFO L241 Difference]: Finished difference. Result has 354 places, 244 transitions, 7015 flow [2020-10-16 03:25:50,665 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 03:25:50,666 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 336 predicate places. [2020-10-16 03:25:50,666 INFO L481 AbstractCegarLoop]: Abstraction has has 354 places, 244 transitions, 7015 flow [2020-10-16 03:25:50,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 03:25:50,666 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:50,666 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:50,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 03:25:50,867 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash -800564376, now seen corresponding path program 57 times [2020-10-16 03:25:50,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:50,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902028189] [2020-10-16 03:25:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:51,031 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 03:25:51,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902028189] [2020-10-16 03:25:51,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678674839] [2020-10-16 03:25:51,031 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 03:25:51,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 03:25:51,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 03:25:51,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:51,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:51,111 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 03:25:51,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:51,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 03:25:51,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83756743] [2020-10-16 03:25:51,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 03:25:51,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:51,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 03:25:51,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 03:25:51,114 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:51,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 244 transitions, 7015 flow. Second operand 18 states. [2020-10-16 03:25:51,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:51,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:51,115 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:51,836 INFO L129 PetriNetUnfolder]: 229/607 cut-off events. [2020-10-16 03:25:51,836 INFO L130 PetriNetUnfolder]: For 87232/87234 co-relation queries the response was YES. [2020-10-16 03:25:51,842 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 03:25:51,848 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 146 selfloop transitions, 114 changer transitions 0/267 dead transitions. [2020-10-16 03:25:51,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 267 transitions, 9094 flow [2020-10-16 03:25:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 03:25:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 03:25:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1550 transitions. [2020-10-16 03:25:51,850 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2020-10-16 03:25:51,850 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1550 transitions. [2020-10-16 03:25:51,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1550 transitions. [2020-10-16 03:25:51,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:51,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1550 transitions. [2020-10-16 03:25:51,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 03:25:51,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 03:25:51,854 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 03:25:51,854 INFO L185 Difference]: Start difference. First operand has 354 places, 244 transitions, 7015 flow. Second operand 23 states and 1550 transitions. [2020-10-16 03:25:51,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 267 transitions, 9094 flow [2020-10-16 03:25:52,102 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 03:25:52,108 INFO L241 Difference]: Finished difference. Result has 362 places, 248 transitions, 7285 flow [2020-10-16 03:25:52,108 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 03:25:52,108 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 344 predicate places. [2020-10-16 03:25:52,108 INFO L481 AbstractCegarLoop]: Abstraction has has 362 places, 248 transitions, 7285 flow [2020-10-16 03:25:52,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 03:25:52,108 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:52,109 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:52,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 03:25:52,309 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:52,310 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 58 times [2020-10-16 03:25:52,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:52,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748471922] [2020-10-16 03:25:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:52,448 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 03:25:52,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748471922] [2020-10-16 03:25:52,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566117440] [2020-10-16 03:25:52,449 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 03:25:52,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:25:52,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:52,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 03:25:52,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:52,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:52,550 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 03:25:52,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:52,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 03:25:52,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123653065] [2020-10-16 03:25:52,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 03:25:52,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 03:25:52,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 03:25:52,554 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:52,555 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 248 transitions, 7285 flow. Second operand 18 states. [2020-10-16 03:25:52,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:52,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:52,556 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:53,687 INFO L129 PetriNetUnfolder]: 233/617 cut-off events. [2020-10-16 03:25:53,687 INFO L130 PetriNetUnfolder]: For 88851/88857 co-relation queries the response was YES. [2020-10-16 03:25:53,695 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 03:25:53,700 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 62 selfloop transitions, 210 changer transitions 0/279 dead transitions. [2020-10-16 03:25:53,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 279 transitions, 9979 flow [2020-10-16 03:25:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 03:25:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 03:25:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2094 transitions. [2020-10-16 03:25:53,702 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675483870967742 [2020-10-16 03:25:53,702 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2094 transitions. [2020-10-16 03:25:53,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2094 transitions. [2020-10-16 03:25:53,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:53,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2094 transitions. [2020-10-16 03:25:53,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 03:25:53,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 03:25:53,705 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 03:25:53,706 INFO L185 Difference]: Start difference. First operand has 362 places, 248 transitions, 7285 flow. Second operand 31 states and 2094 transitions. [2020-10-16 03:25:53,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 279 transitions, 9979 flow [2020-10-16 03:25:54,040 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 03:25:54,047 INFO L241 Difference]: Finished difference. Result has 381 places, 252 transitions, 7808 flow [2020-10-16 03:25:54,047 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 03:25:54,047 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 363 predicate places. [2020-10-16 03:25:54,048 INFO L481 AbstractCegarLoop]: Abstraction has has 381 places, 252 transitions, 7808 flow [2020-10-16 03:25:54,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 03:25:54,048 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:54,048 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:54,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 03:25:54,249 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash -226750371, now seen corresponding path program 59 times [2020-10-16 03:25:54,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:54,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255747379] [2020-10-16 03:25:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:54,447 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 03:25:54,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255747379] [2020-10-16 03:25:54,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3046455] [2020-10-16 03:25:54,447 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 03:25:54,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 03:25:54,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:54,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 03:25:54,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:54,508 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 03:25:54,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:54,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 03:25:54,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534399866] [2020-10-16 03:25:54,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 03:25:54,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:54,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 03:25:54,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 03:25:54,511 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:54,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 252 transitions, 7808 flow. Second operand 18 states. [2020-10-16 03:25:54,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:54,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:54,512 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:55,142 INFO L129 PetriNetUnfolder]: 235/624 cut-off events. [2020-10-16 03:25:55,142 INFO L130 PetriNetUnfolder]: For 92214/92216 co-relation queries the response was YES. [2020-10-16 03:25:55,153 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 03:25:55,162 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 208 selfloop transitions, 56 changer transitions 0/271 dead transitions. [2020-10-16 03:25:55,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 271 transitions, 9680 flow [2020-10-16 03:25:55,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:25:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:25:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1345 transitions. [2020-10-16 03:25:55,164 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6725 [2020-10-16 03:25:55,164 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1345 transitions. [2020-10-16 03:25:55,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1345 transitions. [2020-10-16 03:25:55,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:55,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1345 transitions. [2020-10-16 03:25:55,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:25:55,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:25:55,167 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:25:55,167 INFO L185 Difference]: Start difference. First operand has 381 places, 252 transitions, 7808 flow. Second operand 20 states and 1345 transitions. [2020-10-16 03:25:55,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 271 transitions, 9680 flow [2020-10-16 03:25:55,482 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 03:25:55,488 INFO L241 Difference]: Finished difference. Result has 376 places, 254 transitions, 7526 flow [2020-10-16 03:25:55,489 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 03:25:55,489 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 358 predicate places. [2020-10-16 03:25:55,489 INFO L481 AbstractCegarLoop]: Abstraction has has 376 places, 254 transitions, 7526 flow [2020-10-16 03:25:55,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 03:25:55,489 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:55,490 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:55,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:55,697 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:55,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:55,697 INFO L82 PathProgramCache]: Analyzing trace with hash 50938499, now seen corresponding path program 60 times [2020-10-16 03:25:55,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:55,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035544831] [2020-10-16 03:25:55,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:55,898 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 03:25:55,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035544831] [2020-10-16 03:25:55,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245571534] [2020-10-16 03:25:55,899 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 03:25:55,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 03:25:55,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:55,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 03:25:55,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:55,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:55,981 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 03:25:55,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:55,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 03:25:55,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188007406] [2020-10-16 03:25:55,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 03:25:55,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:55,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 03:25:55,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 03:25:55,984 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:55,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 254 transitions, 7526 flow. Second operand 19 states. [2020-10-16 03:25:55,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:55,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:55,985 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:56,569 INFO L129 PetriNetUnfolder]: 245/655 cut-off events. [2020-10-16 03:25:56,570 INFO L130 PetriNetUnfolder]: For 99450/99456 co-relation queries the response was YES. [2020-10-16 03:25:56,578 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 03:25:56,584 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 192 selfloop transitions, 82 changer transitions 0/281 dead transitions. [2020-10-16 03:25:56,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 281 transitions, 9773 flow [2020-10-16 03:25:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 03:25:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 03:25:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1413 transitions. [2020-10-16 03:25:56,586 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6728571428571428 [2020-10-16 03:25:56,586 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1413 transitions. [2020-10-16 03:25:56,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1413 transitions. [2020-10-16 03:25:56,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:56,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1413 transitions. [2020-10-16 03:25:56,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 03:25:56,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 03:25:56,588 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 03:25:56,588 INFO L185 Difference]: Start difference. First operand has 376 places, 254 transitions, 7526 flow. Second operand 21 states and 1413 transitions. [2020-10-16 03:25:56,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 281 transitions, 9773 flow [2020-10-16 03:25:56,924 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 03:25:56,931 INFO L241 Difference]: Finished difference. Result has 385 places, 264 transitions, 8020 flow [2020-10-16 03:25:56,932 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 03:25:56,932 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 367 predicate places. [2020-10-16 03:25:56,932 INFO L481 AbstractCegarLoop]: Abstraction has has 385 places, 264 transitions, 8020 flow [2020-10-16 03:25:56,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 03:25:56,932 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:56,932 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:57,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:25:57,133 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash 739260289, now seen corresponding path program 61 times [2020-10-16 03:25:57,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:57,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503403731] [2020-10-16 03:25:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:57,304 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 03:25:57,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503403731] [2020-10-16 03:25:57,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145739578] [2020-10-16 03:25:57,304 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 03:25:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:57,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 03:25:57,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:57,371 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 03:25:57,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:57,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 03:25:57,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158500779] [2020-10-16 03:25:57,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 03:25:57,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:57,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 03:25:57,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 03:25:57,374 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:57,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 264 transitions, 8020 flow. Second operand 18 states. [2020-10-16 03:25:57,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:57,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:57,375 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:25:58,187 INFO L129 PetriNetUnfolder]: 261/703 cut-off events. [2020-10-16 03:25:58,187 INFO L130 PetriNetUnfolder]: For 107553/107559 co-relation queries the response was YES. [2020-10-16 03:25:58,195 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 03:25:58,202 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 174 selfloop transitions, 118 changer transitions 0/299 dead transitions. [2020-10-16 03:25:58,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 299 transitions, 10707 flow [2020-10-16 03:25:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 03:25:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 03:25:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1481 transitions. [2020-10-16 03:25:58,204 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6731818181818182 [2020-10-16 03:25:58,204 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1481 transitions. [2020-10-16 03:25:58,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1481 transitions. [2020-10-16 03:25:58,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:25:58,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1481 transitions. [2020-10-16 03:25:58,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 03:25:58,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 03:25:58,206 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 03:25:58,206 INFO L185 Difference]: Start difference. First operand has 385 places, 264 transitions, 8020 flow. Second operand 22 states and 1481 transitions. [2020-10-16 03:25:58,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 299 transitions, 10707 flow [2020-10-16 03:25:58,541 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 03:25:58,548 INFO L241 Difference]: Finished difference. Result has 403 places, 280 transitions, 8913 flow [2020-10-16 03:25:58,549 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 03:25:58,549 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 385 predicate places. [2020-10-16 03:25:58,549 INFO L481 AbstractCegarLoop]: Abstraction has has 403 places, 280 transitions, 8913 flow [2020-10-16 03:25:58,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 03:25:58,549 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:25:58,549 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:25:58,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-16 03:25:58,757 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:25:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:25:58,757 INFO L82 PathProgramCache]: Analyzing trace with hash 519781787, now seen corresponding path program 62 times [2020-10-16 03:25:58,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:25:58,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561216486] [2020-10-16 03:25:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:25:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:25:58,956 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 03:25:58,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561216486] [2020-10-16 03:25:58,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673471633] [2020-10-16 03:25:58,958 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 03:25:59,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:25:59,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:25:59,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 03:25:59,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:25:59,068 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:25:59,088 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 03:25:59,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:25:59,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 03:25:59,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227606042] [2020-10-16 03:25:59,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 03:25:59,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:25:59,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 03:25:59,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 03:25:59,092 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:25:59,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 280 transitions, 8913 flow. Second operand 19 states. [2020-10-16 03:25:59,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:25:59,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:25:59,094 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:00,352 INFO L129 PetriNetUnfolder]: 263/709 cut-off events. [2020-10-16 03:26:00,352 INFO L130 PetriNetUnfolder]: For 108883/108885 co-relation queries the response was YES. [2020-10-16 03:26:00,373 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 03:26:00,392 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 154 selfloop transitions, 140 changer transitions 0/301 dead transitions. [2020-10-16 03:26:00,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 301 transitions, 11009 flow [2020-10-16 03:26:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 03:26:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 03:26:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1549 transitions. [2020-10-16 03:26:00,397 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734782608695652 [2020-10-16 03:26:00,397 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1549 transitions. [2020-10-16 03:26:00,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1549 transitions. [2020-10-16 03:26:00,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:00,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1549 transitions. [2020-10-16 03:26:00,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 03:26:00,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 03:26:00,404 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 03:26:00,405 INFO L185 Difference]: Start difference. First operand has 403 places, 280 transitions, 8913 flow. Second operand 23 states and 1549 transitions. [2020-10-16 03:26:00,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 301 transitions, 11009 flow [2020-10-16 03:26:01,227 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 03:26:01,239 INFO L241 Difference]: Finished difference. Result has 416 places, 282 transitions, 9130 flow [2020-10-16 03:26:01,239 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 03:26:01,240 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 398 predicate places. [2020-10-16 03:26:01,240 INFO L481 AbstractCegarLoop]: Abstraction has has 416 places, 282 transitions, 9130 flow [2020-10-16 03:26:01,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 03:26:01,241 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:01,241 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:01,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:01,456 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:01,457 INFO L82 PathProgramCache]: Analyzing trace with hash 107292771, now seen corresponding path program 63 times [2020-10-16 03:26:01,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:01,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725354258] [2020-10-16 03:26:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:01,698 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 03:26:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725354258] [2020-10-16 03:26:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258298138] [2020-10-16 03:26:01,699 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 03:26:01,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 03:26:01,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:01,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 03:26:01,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:01,774 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 03:26:01,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:01,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 03:26:01,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715540315] [2020-10-16 03:26:01,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 03:26:01,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:01,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 03:26:01,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 03:26:01,777 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:01,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 282 transitions, 9130 flow. Second operand 18 states. [2020-10-16 03:26:01,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:01,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:01,778 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:02,604 INFO L129 PetriNetUnfolder]: 267/721 cut-off events. [2020-10-16 03:26:02,604 INFO L130 PetriNetUnfolder]: For 110281/110283 co-relation queries the response was YES. [2020-10-16 03:26:02,613 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 03:26:02,620 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 128 selfloop transitions, 172 changer transitions 0/307 dead transitions. [2020-10-16 03:26:02,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 307 transitions, 11430 flow [2020-10-16 03:26:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 03:26:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 03:26:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1617 transitions. [2020-10-16 03:26:02,622 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67375 [2020-10-16 03:26:02,622 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1617 transitions. [2020-10-16 03:26:02,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1617 transitions. [2020-10-16 03:26:02,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:02,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1617 transitions. [2020-10-16 03:26:02,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 03:26:02,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 03:26:02,624 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 03:26:02,625 INFO L185 Difference]: Start difference. First operand has 416 places, 282 transitions, 9130 flow. Second operand 24 states and 1617 transitions. [2020-10-16 03:26:02,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 307 transitions, 11430 flow [2020-10-16 03:26:03,018 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 03:26:03,026 INFO L241 Difference]: Finished difference. Result has 423 places, 286 transitions, 9386 flow [2020-10-16 03:26:03,026 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 03:26:03,027 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 405 predicate places. [2020-10-16 03:26:03,027 INFO L481 AbstractCegarLoop]: Abstraction has has 423 places, 286 transitions, 9386 flow [2020-10-16 03:26:03,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 03:26:03,027 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:03,027 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:03,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 03:26:03,228 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:03,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:03,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1364182471, now seen corresponding path program 64 times [2020-10-16 03:26:03,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:03,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831058977] [2020-10-16 03:26:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:03,407 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 03:26:03,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831058977] [2020-10-16 03:26:03,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604154168] [2020-10-16 03:26:03,408 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 03:26:03,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:26:03,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:03,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 03:26:03,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:03,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:03,490 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 03:26:03,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:03,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 03:26:03,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702611645] [2020-10-16 03:26:03,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 03:26:03,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 03:26:03,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-16 03:26:03,492 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:03,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 286 transitions, 9386 flow. Second operand 19 states. [2020-10-16 03:26:03,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:03,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:03,493 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:04,337 INFO L129 PetriNetUnfolder]: 269/727 cut-off events. [2020-10-16 03:26:04,338 INFO L130 PetriNetUnfolder]: For 111071/111073 co-relation queries the response was YES. [2020-10-16 03:26:04,348 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 03:26:04,355 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 112 selfloop transitions, 190 changer transitions 0/309 dead transitions. [2020-10-16 03:26:04,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 309 transitions, 11642 flow [2020-10-16 03:26:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 03:26:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 03:26:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1685 transitions. [2020-10-16 03:26:04,357 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 03:26:04,357 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1685 transitions. [2020-10-16 03:26:04,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1685 transitions. [2020-10-16 03:26:04,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:04,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1685 transitions. [2020-10-16 03:26:04,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 03:26:04,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 03:26:04,359 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 03:26:04,359 INFO L185 Difference]: Start difference. First operand has 423 places, 286 transitions, 9386 flow. Second operand 25 states and 1685 transitions. [2020-10-16 03:26:04,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 309 transitions, 11642 flow [2020-10-16 03:26:04,764 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 03:26:04,772 INFO L241 Difference]: Finished difference. Result has 426 places, 288 transitions, 9506 flow [2020-10-16 03:26:04,773 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 03:26:04,773 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 408 predicate places. [2020-10-16 03:26:04,773 INFO L481 AbstractCegarLoop]: Abstraction has has 426 places, 288 transitions, 9506 flow [2020-10-16 03:26:04,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 03:26:04,773 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:04,773 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:04,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:04,974 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:04,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:04,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1314592315, now seen corresponding path program 65 times [2020-10-16 03:26:04,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:04,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316525075] [2020-10-16 03:26:04,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:05,148 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 03:26:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316525075] [2020-10-16 03:26:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273317508] [2020-10-16 03:26:05,149 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 03:26:05,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 03:26:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 03:26:05,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:05,258 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 03:26:05,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:05,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 03:26:05,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897567226] [2020-10-16 03:26:05,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 03:26:05,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:05,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 03:26:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-16 03:26:05,264 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:05,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 288 transitions, 9506 flow. Second operand 18 states. [2020-10-16 03:26:05,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:05,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:05,266 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:06,640 INFO L129 PetriNetUnfolder]: 273/739 cut-off events. [2020-10-16 03:26:06,640 INFO L130 PetriNetUnfolder]: For 112615/112621 co-relation queries the response was YES. [2020-10-16 03:26:06,650 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 03:26:06,658 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 90 selfloop transitions, 218 changer transitions 0/315 dead transitions. [2020-10-16 03:26:06,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 315 transitions, 11960 flow [2020-10-16 03:26:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 03:26:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 03:26:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1753 transitions. [2020-10-16 03:26:06,659 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742307692307692 [2020-10-16 03:26:06,660 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1753 transitions. [2020-10-16 03:26:06,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1753 transitions. [2020-10-16 03:26:06,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:06,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1753 transitions. [2020-10-16 03:26:06,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 03:26:06,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 03:26:06,662 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 03:26:06,662 INFO L185 Difference]: Start difference. First operand has 426 places, 288 transitions, 9506 flow. Second operand 26 states and 1753 transitions. [2020-10-16 03:26:06,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 315 transitions, 11960 flow [2020-10-16 03:26:07,113 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 03:26:07,121 INFO L241 Difference]: Finished difference. Result has 431 places, 292 transitions, 9744 flow [2020-10-16 03:26:07,122 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 03:26:07,122 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 413 predicate places. [2020-10-16 03:26:07,122 INFO L481 AbstractCegarLoop]: Abstraction has has 431 places, 292 transitions, 9744 flow [2020-10-16 03:26:07,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 03:26:07,122 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:07,122 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:07,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 03:26:07,323 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:07,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:07,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2064335679, now seen corresponding path program 66 times [2020-10-16 03:26:07,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:07,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367556770] [2020-10-16 03:26:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:07,482 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 03:26:07,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367556770] [2020-10-16 03:26:07,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127665362] [2020-10-16 03:26:07,483 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 03:26:07,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 03:26:07,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 03:26:07,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:07,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:07,571 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 03:26:07,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:07,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 03:26:07,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357616232] [2020-10-16 03:26:07,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 03:26:07,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:07,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 03:26:07,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 03:26:07,573 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:07,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 292 transitions, 9744 flow. Second operand 19 states. [2020-10-16 03:26:07,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:07,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:07,574 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:08,594 INFO L129 PetriNetUnfolder]: 281/762 cut-off events. [2020-10-16 03:26:08,594 INFO L130 PetriNetUnfolder]: For 115774/115780 co-relation queries the response was YES. [2020-10-16 03:26:08,605 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 03:26:08,612 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 66 selfloop transitions, 252 changer transitions 0/325 dead transitions. [2020-10-16 03:26:08,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 325 transitions, 12467 flow [2020-10-16 03:26:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 03:26:08,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-16 03:26:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1957 transitions. [2020-10-16 03:26:08,614 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748275862068965 [2020-10-16 03:26:08,614 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1957 transitions. [2020-10-16 03:26:08,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1957 transitions. [2020-10-16 03:26:08,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:08,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1957 transitions. [2020-10-16 03:26:08,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-16 03:26:08,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-16 03:26:08,617 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-16 03:26:08,617 INFO L185 Difference]: Start difference. First operand has 431 places, 292 transitions, 9744 flow. Second operand 29 states and 1957 transitions. [2020-10-16 03:26:08,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 325 transitions, 12467 flow [2020-10-16 03:26:09,059 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 03:26:09,067 INFO L241 Difference]: Finished difference. Result has 440 places, 300 transitions, 10196 flow [2020-10-16 03:26:09,068 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 03:26:09,068 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 422 predicate places. [2020-10-16 03:26:09,068 INFO L481 AbstractCegarLoop]: Abstraction has has 440 places, 300 transitions, 10196 flow [2020-10-16 03:26:09,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 03:26:09,068 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:09,068 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:09,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:09,269 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1577252829, now seen corresponding path program 67 times [2020-10-16 03:26:09,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:09,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262590359] [2020-10-16 03:26:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:09,426 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 03:26:09,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262590359] [2020-10-16 03:26:09,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573153896] [2020-10-16 03:26:09,427 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 03:26:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:09,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 03:26:09,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:09,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:09,521 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 03:26:09,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:09,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 03:26:09,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253985119] [2020-10-16 03:26:09,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 03:26:09,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:09,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 03:26:09,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-16 03:26:09,524 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:09,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 300 transitions, 10196 flow. Second operand 19 states. [2020-10-16 03:26:09,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:09,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:09,532 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:09,926 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2020-10-16 03:26:10,832 INFO L129 PetriNetUnfolder]: 285/772 cut-off events. [2020-10-16 03:26:10,832 INFO L130 PetriNetUnfolder]: For 117478/117484 co-relation queries the response was YES. [2020-10-16 03:26:10,844 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 03:26:10,851 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 52 selfloop transitions, 272 changer transitions 0/331 dead transitions. [2020-10-16 03:26:10,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 331 transitions, 12978 flow [2020-10-16 03:26:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 03:26:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 03:26:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2093 transitions. [2020-10-16 03:26:10,853 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751612903225807 [2020-10-16 03:26:10,853 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2093 transitions. [2020-10-16 03:26:10,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2093 transitions. [2020-10-16 03:26:10,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:10,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2093 transitions. [2020-10-16 03:26:10,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 03:26:10,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 03:26:10,856 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 03:26:10,856 INFO L185 Difference]: Start difference. First operand has 440 places, 300 transitions, 10196 flow. Second operand 31 states and 2093 transitions. [2020-10-16 03:26:10,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 331 transitions, 12978 flow [2020-10-16 03:26:11,323 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 03:26:11,331 INFO L241 Difference]: Finished difference. Result has 448 places, 304 transitions, 10521 flow [2020-10-16 03:26:11,332 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 03:26:11,332 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 430 predicate places. [2020-10-16 03:26:11,332 INFO L481 AbstractCegarLoop]: Abstraction has has 448 places, 304 transitions, 10521 flow [2020-10-16 03:26:11,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 03:26:11,332 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:11,332 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:11,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 03:26:11,533 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:11,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:11,534 INFO L82 PathProgramCache]: Analyzing trace with hash -372075953, now seen corresponding path program 68 times [2020-10-16 03:26:11,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:11,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938255857] [2020-10-16 03:26:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:11,687 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 03:26:11,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938255857] [2020-10-16 03:26:11,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897074148] [2020-10-16 03:26:11,688 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 03:26:11,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:26:11,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:11,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 03:26:11,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:11,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:11,803 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 03:26:11,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:11,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 03:26:11,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900092891] [2020-10-16 03:26:11,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 03:26:11,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:11,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 03:26:11,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-16 03:26:11,806 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:11,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 304 transitions, 10521 flow. Second operand 19 states. [2020-10-16 03:26:11,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:11,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:11,807 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:13,000 INFO L129 PetriNetUnfolder]: 289/782 cut-off events. [2020-10-16 03:26:13,000 INFO L130 PetriNetUnfolder]: For 119341/119343 co-relation queries the response was YES. [2020-10-16 03:26:13,012 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 03:26:13,020 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 44 selfloop transitions, 286 changer transitions 0/337 dead transitions. [2020-10-16 03:26:13,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 337 transitions, 13529 flow [2020-10-16 03:26:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 03:26:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-16 03:26:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2229 transitions. [2020-10-16 03:26:13,023 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754545454545454 [2020-10-16 03:26:13,023 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2229 transitions. [2020-10-16 03:26:13,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2229 transitions. [2020-10-16 03:26:13,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:13,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2229 transitions. [2020-10-16 03:26:13,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-16 03:26:13,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-16 03:26:13,026 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-16 03:26:13,026 INFO L185 Difference]: Start difference. First operand has 448 places, 304 transitions, 10521 flow. Second operand 33 states and 2229 transitions. [2020-10-16 03:26:13,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 337 transitions, 13529 flow [2020-10-16 03:26:13,676 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 03:26:13,685 INFO L241 Difference]: Finished difference. Result has 456 places, 308 transitions, 10869 flow [2020-10-16 03:26:13,685 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 03:26:13,685 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 438 predicate places. [2020-10-16 03:26:13,685 INFO L481 AbstractCegarLoop]: Abstraction has has 456 places, 308 transitions, 10869 flow [2020-10-16 03:26:13,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 03:26:13,686 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:13,686 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:13,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 03:26:13,887 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:13,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:13,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1332079165, now seen corresponding path program 69 times [2020-10-16 03:26:13,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:13,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365722458] [2020-10-16 03:26:13,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:14,031 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 03:26:14,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365722458] [2020-10-16 03:26:14,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122236490] [2020-10-16 03:26:14,032 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 03:26:14,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 03:26:14,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:14,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 03:26:14,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:14,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:26:14,154 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 03:26:14,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:14,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 03:26:14,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254247224] [2020-10-16 03:26:14,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 03:26:14,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:14,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 03:26:14,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-16 03:26:14,156 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:14,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 308 transitions, 10869 flow. Second operand 19 states. [2020-10-16 03:26:14,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:14,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:14,157 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:15,309 INFO L129 PetriNetUnfolder]: 292/788 cut-off events. [2020-10-16 03:26:15,309 INFO L130 PetriNetUnfolder]: For 123661/123667 co-relation queries the response was YES. [2020-10-16 03:26:15,322 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 03:26:15,330 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 88 selfloop transitions, 244 changer transitions 0/339 dead transitions. [2020-10-16 03:26:15,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 339 transitions, 13783 flow [2020-10-16 03:26:15,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 03:26:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 03:26:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2161 transitions. [2020-10-16 03:26:15,333 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753125 [2020-10-16 03:26:15,333 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2161 transitions. [2020-10-16 03:26:15,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2161 transitions. [2020-10-16 03:26:15,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:15,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2161 transitions. [2020-10-16 03:26:15,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 03:26:15,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 03:26:15,336 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 03:26:15,336 INFO L185 Difference]: Start difference. First operand has 456 places, 308 transitions, 10869 flow. Second operand 32 states and 2161 transitions. [2020-10-16 03:26:15,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 339 transitions, 13783 flow [2020-10-16 03:26:15,885 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 03:26:15,895 INFO L241 Difference]: Finished difference. Result has 461 places, 311 transitions, 10953 flow [2020-10-16 03:26:15,895 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 03:26:15,895 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 443 predicate places. [2020-10-16 03:26:15,895 INFO L481 AbstractCegarLoop]: Abstraction has has 461 places, 311 transitions, 10953 flow [2020-10-16 03:26:15,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 03:26:15,895 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:15,896 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:16,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:16,096 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:16,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1350563652, now seen corresponding path program 70 times [2020-10-16 03:26:16,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:16,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617619710] [2020-10-16 03:26:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:16,253 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 03:26:16,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617619710] [2020-10-16 03:26:16,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612381660] [2020-10-16 03:26:16,254 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 03:26:16,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:26:16,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:16,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 03:26:16,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:16,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:26:16,340 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 03:26:16,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:16,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 03:26:16,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707748888] [2020-10-16 03:26:16,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 03:26:16,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:16,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 03:26:16,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-16 03:26:16,343 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:16,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 311 transitions, 10953 flow. Second operand 20 states. [2020-10-16 03:26:16,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:16,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:16,344 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:17,685 INFO L129 PetriNetUnfolder]: 295/794 cut-off events. [2020-10-16 03:26:17,685 INFO L130 PetriNetUnfolder]: For 128011/128017 co-relation queries the response was YES. [2020-10-16 03:26:17,702 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 03:26:17,713 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 47 selfloop transitions, 290 changer transitions 0/344 dead transitions. [2020-10-16 03:26:17,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 344 transitions, 14051 flow [2020-10-16 03:26:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 03:26:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 03:26:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2161 transitions. [2020-10-16 03:26:17,715 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753125 [2020-10-16 03:26:17,715 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2161 transitions. [2020-10-16 03:26:17,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2161 transitions. [2020-10-16 03:26:17,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:17,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2161 transitions. [2020-10-16 03:26:17,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 03:26:17,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 03:26:17,718 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 03:26:17,718 INFO L185 Difference]: Start difference. First operand has 461 places, 311 transitions, 10953 flow. Second operand 32 states and 2161 transitions. [2020-10-16 03:26:17,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 344 transitions, 14051 flow [2020-10-16 03:26:18,219 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 03:26:18,228 INFO L241 Difference]: Finished difference. Result has 465 places, 314 transitions, 11228 flow [2020-10-16 03:26:18,229 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 03:26:18,229 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 447 predicate places. [2020-10-16 03:26:18,229 INFO L481 AbstractCegarLoop]: Abstraction has has 465 places, 314 transitions, 11228 flow [2020-10-16 03:26:18,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 03:26:18,230 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:18,230 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:18,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:18,439 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:18,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1627630641, now seen corresponding path program 71 times [2020-10-16 03:26:18,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:18,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426850439] [2020-10-16 03:26:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:18,658 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 03:26:18,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426850439] [2020-10-16 03:26:18,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551150513] [2020-10-16 03:26:18,659 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 03:26:18,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 03:26:18,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:18,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 03:26:18,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:18,723 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 03:26:18,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:18,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 03:26:18,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572214101] [2020-10-16 03:26:18,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 03:26:18,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:18,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 03:26:18,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-16 03:26:18,726 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:18,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 314 transitions, 11228 flow. Second operand 19 states. [2020-10-16 03:26:18,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:18,727 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:18,727 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:19,412 INFO L129 PetriNetUnfolder]: 297/801 cut-off events. [2020-10-16 03:26:19,412 INFO L130 PetriNetUnfolder]: For 133537/133539 co-relation queries the response was YES. [2020-10-16 03:26:19,424 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 03:26:19,433 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 299 selfloop transitions, 27 changer transitions 0/333 dead transitions. [2020-10-16 03:26:19,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 333 transitions, 13312 flow [2020-10-16 03:26:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:26:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:26:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1344 transitions. [2020-10-16 03:26:19,434 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.672 [2020-10-16 03:26:19,434 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1344 transitions. [2020-10-16 03:26:19,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1344 transitions. [2020-10-16 03:26:19,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:19,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1344 transitions. [2020-10-16 03:26:19,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:26:19,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:26:19,436 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:26:19,436 INFO L185 Difference]: Start difference. First operand has 465 places, 314 transitions, 11228 flow. Second operand 20 states and 1344 transitions. [2020-10-16 03:26:19,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 333 transitions, 13312 flow [2020-10-16 03:26:20,008 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 03:26:20,017 INFO L241 Difference]: Finished difference. Result has 458 places, 316 transitions, 10768 flow [2020-10-16 03:26:20,017 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 03:26:20,018 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 440 predicate places. [2020-10-16 03:26:20,018 INFO L481 AbstractCegarLoop]: Abstraction has has 458 places, 316 transitions, 10768 flow [2020-10-16 03:26:20,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 03:26:20,018 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:20,018 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:20,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:20,219 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:20,219 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 72 times [2020-10-16 03:26:20,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:20,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798144580] [2020-10-16 03:26:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:20,418 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 03:26:20,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798144580] [2020-10-16 03:26:20,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451820756] [2020-10-16 03:26:20,419 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 03:26:20,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 03:26:20,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:20,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 03:26:20,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:20,485 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 03:26:20,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:20,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 03:26:20,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867905135] [2020-10-16 03:26:20,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 03:26:20,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:20,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 03:26:20,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-16 03:26:20,488 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:20,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 316 transitions, 10768 flow. Second operand 19 states. [2020-10-16 03:26:20,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:20,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:20,489 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:21,442 INFO L129 PetriNetUnfolder]: 299/808 cut-off events. [2020-10-16 03:26:21,443 INFO L130 PetriNetUnfolder]: For 141918/141924 co-relation queries the response was YES. [2020-10-16 03:26:21,454 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 03:26:21,463 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 214 selfloop transitions, 118 changer transitions 0/339 dead transitions. [2020-10-16 03:26:21,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 339 transitions, 13210 flow [2020-10-16 03:26:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 03:26:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 03:26:21,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1751 transitions. [2020-10-16 03:26:21,465 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734615384615384 [2020-10-16 03:26:21,465 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1751 transitions. [2020-10-16 03:26:21,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1751 transitions. [2020-10-16 03:26:21,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:21,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1751 transitions. [2020-10-16 03:26:21,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 03:26:21,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 03:26:21,467 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 03:26:21,467 INFO L185 Difference]: Start difference. First operand has 458 places, 316 transitions, 10768 flow. Second operand 26 states and 1751 transitions. [2020-10-16 03:26:21,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 339 transitions, 13210 flow [2020-10-16 03:26:22,102 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 03:26:22,113 INFO L241 Difference]: Finished difference. Result has 468 places, 318 transitions, 11004 flow [2020-10-16 03:26:22,114 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 03:26:22,114 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 450 predicate places. [2020-10-16 03:26:22,114 INFO L481 AbstractCegarLoop]: Abstraction has has 468 places, 318 transitions, 11004 flow [2020-10-16 03:26:22,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 03:26:22,114 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:22,115 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:22,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:22,328 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:22,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:22,329 INFO L82 PathProgramCache]: Analyzing trace with hash -543203417, now seen corresponding path program 73 times [2020-10-16 03:26:22,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:22,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055686544] [2020-10-16 03:26:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:22,535 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 03:26:22,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055686544] [2020-10-16 03:26:22,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827983084] [2020-10-16 03:26:22,535 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 03:26:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 03:26:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:22,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:22,619 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 03:26:22,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:22,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 03:26:22,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289555987] [2020-10-16 03:26:22,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 03:26:22,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:22,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 03:26:22,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 03:26:22,622 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:22,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 318 transitions, 11004 flow. Second operand 20 states. [2020-10-16 03:26:22,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:22,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:22,623 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:23,525 INFO L129 PetriNetUnfolder]: 301/814 cut-off events. [2020-10-16 03:26:23,525 INFO L130 PetriNetUnfolder]: For 147027/147029 co-relation queries the response was YES. [2020-10-16 03:26:23,539 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 03:26:23,547 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 196 selfloop transitions, 138 changer transitions 0/341 dead transitions. [2020-10-16 03:26:23,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 341 transitions, 13472 flow [2020-10-16 03:26:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 03:26:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 03:26:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1684 transitions. [2020-10-16 03:26:23,549 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6736 [2020-10-16 03:26:23,549 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1684 transitions. [2020-10-16 03:26:23,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1684 transitions. [2020-10-16 03:26:23,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:23,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1684 transitions. [2020-10-16 03:26:23,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 03:26:23,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 03:26:23,552 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 03:26:23,552 INFO L185 Difference]: Start difference. First operand has 468 places, 318 transitions, 11004 flow. Second operand 25 states and 1684 transitions. [2020-10-16 03:26:23,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 341 transitions, 13472 flow [2020-10-16 03:26:24,165 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 03:26:24,177 INFO L241 Difference]: Finished difference. Result has 480 places, 320 transitions, 11236 flow [2020-10-16 03:26:24,178 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 03:26:24,178 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 462 predicate places. [2020-10-16 03:26:24,179 INFO L481 AbstractCegarLoop]: Abstraction has has 480 places, 320 transitions, 11236 flow [2020-10-16 03:26:24,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 03:26:24,179 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:24,179 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:24,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-16 03:26:24,385 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:24,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:24,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1167646413, now seen corresponding path program 74 times [2020-10-16 03:26:24,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:24,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741815808] [2020-10-16 03:26:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:24,557 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 03:26:24,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741815808] [2020-10-16 03:26:24,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442312731] [2020-10-16 03:26:24,558 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 03:26:24,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:26:24,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 03:26:24,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:24,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:24,642 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 03:26:24,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:24,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 03:26:24,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254443308] [2020-10-16 03:26:24,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 03:26:24,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:24,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 03:26:24,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 03:26:24,645 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:24,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 320 transitions, 11236 flow. Second operand 20 states. [2020-10-16 03:26:24,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:24,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:24,646 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:26,097 INFO L129 PetriNetUnfolder]: 305/826 cut-off events. [2020-10-16 03:26:26,097 INFO L130 PetriNetUnfolder]: For 148817/148823 co-relation queries the response was YES. [2020-10-16 03:26:26,109 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 03:26:26,118 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 98 selfloop transitions, 246 changer transitions 0/351 dead transitions. [2020-10-16 03:26:26,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 351 transitions, 14250 flow [2020-10-16 03:26:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 03:26:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 03:26:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2092 transitions. [2020-10-16 03:26:26,120 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748387096774193 [2020-10-16 03:26:26,120 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2092 transitions. [2020-10-16 03:26:26,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2092 transitions. [2020-10-16 03:26:26,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:26,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2092 transitions. [2020-10-16 03:26:26,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 03:26:26,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 03:26:26,124 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 03:26:26,125 INFO L185 Difference]: Start difference. First operand has 480 places, 320 transitions, 11236 flow. Second operand 31 states and 2092 transitions. [2020-10-16 03:26:26,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 351 transitions, 14250 flow [2020-10-16 03:26:26,838 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 03:26:26,847 INFO L241 Difference]: Finished difference. Result has 489 places, 324 transitions, 11614 flow [2020-10-16 03:26:26,848 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 03:26:26,848 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 471 predicate places. [2020-10-16 03:26:26,848 INFO L481 AbstractCegarLoop]: Abstraction has has 489 places, 324 transitions, 11614 flow [2020-10-16 03:26:26,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 03:26:26,849 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:26,849 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:27,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:27,065 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1638642123, now seen corresponding path program 75 times [2020-10-16 03:26:27,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:27,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980615710] [2020-10-16 03:26:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:27,238 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 03:26:27,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980615710] [2020-10-16 03:26:27,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692517021] [2020-10-16 03:26:27,239 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 03:26:27,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 03:26:27,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:27,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 03:26:27,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:27,308 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 03:26:27,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:27,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 03:26:27,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118718873] [2020-10-16 03:26:27,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 03:26:27,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:27,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 03:26:27,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 03:26:27,310 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:27,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 324 transitions, 11614 flow. Second operand 19 states. [2020-10-16 03:26:27,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:27,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:27,311 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:28,351 INFO L129 PetriNetUnfolder]: 311/843 cut-off events. [2020-10-16 03:26:28,351 INFO L130 PetriNetUnfolder]: For 151285/151291 co-relation queries the response was YES. [2020-10-16 03:26:28,365 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 03:26:28,374 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 85 selfloop transitions, 268 changer transitions 0/360 dead transitions. [2020-10-16 03:26:28,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 360 transitions, 14947 flow [2020-10-16 03:26:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 03:26:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 03:26:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2295 transitions. [2020-10-16 03:26:28,376 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:26:28,376 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2295 transitions. [2020-10-16 03:26:28,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2295 transitions. [2020-10-16 03:26:28,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:28,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2295 transitions. [2020-10-16 03:26:28,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-16 03:26:28,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-16 03:26:28,379 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-16 03:26:28,379 INFO L185 Difference]: Start difference. First operand has 489 places, 324 transitions, 11614 flow. Second operand 34 states and 2295 transitions. [2020-10-16 03:26:28,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 360 transitions, 14947 flow [2020-10-16 03:26:28,979 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 03:26:28,989 INFO L241 Difference]: Finished difference. Result has 499 places, 331 transitions, 12069 flow [2020-10-16 03:26:28,989 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 03:26:28,989 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 481 predicate places. [2020-10-16 03:26:28,989 INFO L481 AbstractCegarLoop]: Abstraction has has 499 places, 331 transitions, 12069 flow [2020-10-16 03:26:28,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 03:26:28,989 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:28,990 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:29,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 03:26:29,190 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:29,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1654729263, now seen corresponding path program 76 times [2020-10-16 03:26:29,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:29,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653197430] [2020-10-16 03:26:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:29,361 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 03:26:29,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653197430] [2020-10-16 03:26:29,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595030624] [2020-10-16 03:26:29,362 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 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 03:26:29,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:26:29,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:29,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 03:26:29,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:29,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:29,449 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 03:26:29,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:29,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 03:26:29,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265475900] [2020-10-16 03:26:29,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 03:26:29,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:29,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 03:26:29,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 03:26:29,452 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:29,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 331 transitions, 12069 flow. Second operand 20 states. [2020-10-16 03:26:29,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:29,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:29,453 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:30,735 INFO L129 PetriNetUnfolder]: 313/849 cut-off events. [2020-10-16 03:26:30,735 INFO L130 PetriNetUnfolder]: For 156716/156722 co-relation queries the response was YES. [2020-10-16 03:26:30,748 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 03:26:30,757 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 83 selfloop transitions, 272 changer transitions 0/362 dead transitions. [2020-10-16 03:26:30,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 362 transitions, 15235 flow [2020-10-16 03:26:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 03:26:30,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-16 03:26:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2228 transitions. [2020-10-16 03:26:30,759 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751515151515152 [2020-10-16 03:26:30,759 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2228 transitions. [2020-10-16 03:26:30,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2228 transitions. [2020-10-16 03:26:30,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:30,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2228 transitions. [2020-10-16 03:26:30,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-16 03:26:30,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-16 03:26:30,762 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-16 03:26:30,763 INFO L185 Difference]: Start difference. First operand has 499 places, 331 transitions, 12069 flow. Second operand 33 states and 2228 transitions. [2020-10-16 03:26:30,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 362 transitions, 15235 flow [2020-10-16 03:26:31,389 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 03:26:31,398 INFO L241 Difference]: Finished difference. Result has 504 places, 333 transitions, 12195 flow [2020-10-16 03:26:31,399 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 03:26:31,399 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 486 predicate places. [2020-10-16 03:26:31,399 INFO L481 AbstractCegarLoop]: Abstraction has has 504 places, 333 transitions, 12195 flow [2020-10-16 03:26:31,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 03:26:31,399 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:31,400 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:31,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:31,606 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:31,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1655219373, now seen corresponding path program 77 times [2020-10-16 03:26:31,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:31,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966716020] [2020-10-16 03:26:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:31,779 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 03:26:31,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966716020] [2020-10-16 03:26:31,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051409060] [2020-10-16 03:26:31,780 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 03:26:31,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 03:26:31,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:31,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 03:26:31,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:31,849 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 03:26:31,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:31,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 03:26:31,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309220817] [2020-10-16 03:26:31,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 03:26:31,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:31,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 03:26:31,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-16 03:26:31,852 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:31,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 333 transitions, 12195 flow. Second operand 19 states. [2020-10-16 03:26:31,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:31,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:31,852 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:32,966 INFO L129 PetriNetUnfolder]: 324/875 cut-off events. [2020-10-16 03:26:32,966 INFO L130 PetriNetUnfolder]: For 167496/167498 co-relation queries the response was YES. [2020-10-16 03:26:32,981 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 03:26:32,991 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 77 selfloop transitions, 289 changer transitions 0/373 dead transitions. [2020-10-16 03:26:32,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 373 transitions, 16001 flow [2020-10-16 03:26:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 03:26:32,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 03:26:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2432 transitions. [2020-10-16 03:26:32,993 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2020-10-16 03:26:32,993 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2432 transitions. [2020-10-16 03:26:32,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2432 transitions. [2020-10-16 03:26:32,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:32,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2432 transitions. [2020-10-16 03:26:32,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 03:26:32,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 03:26:32,998 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 03:26:32,998 INFO L185 Difference]: Start difference. First operand has 504 places, 333 transitions, 12195 flow. Second operand 36 states and 2432 transitions. [2020-10-16 03:26:32,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 373 transitions, 16001 flow [2020-10-16 03:26:33,739 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 03:26:33,749 INFO L241 Difference]: Finished difference. Result has 514 places, 341 transitions, 12761 flow [2020-10-16 03:26:33,750 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 03:26:33,750 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 496 predicate places. [2020-10-16 03:26:33,750 INFO L481 AbstractCegarLoop]: Abstraction has has 514 places, 341 transitions, 12761 flow [2020-10-16 03:26:33,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 03:26:33,750 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:33,750 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:33,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 03:26:33,958 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:33,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:33,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1655236113, now seen corresponding path program 78 times [2020-10-16 03:26:33,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:33,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753951088] [2020-10-16 03:26:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:34,130 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 03:26:34,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753951088] [2020-10-16 03:26:34,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23998612] [2020-10-16 03:26:34,131 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 03:26:34,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 03:26:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:34,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:26:34,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:34,229 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 03:26:34,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:34,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 03:26:34,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989616309] [2020-10-16 03:26:34,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 03:26:34,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:34,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 03:26:34,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 03:26:34,232 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:34,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 341 transitions, 12761 flow. Second operand 20 states. [2020-10-16 03:26:34,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:34,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:34,232 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:35,549 INFO L129 PetriNetUnfolder]: 321/869 cut-off events. [2020-10-16 03:26:35,549 INFO L130 PetriNetUnfolder]: For 174330/174332 co-relation queries the response was YES. [2020-10-16 03:26:35,562 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 03:26:35,572 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 76 selfloop transitions, 290 changer transitions 0/373 dead transitions. [2020-10-16 03:26:35,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 373 transitions, 16129 flow [2020-10-16 03:26:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 03:26:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 03:26:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2364 transitions. [2020-10-16 03:26:35,575 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754285714285714 [2020-10-16 03:26:35,575 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2364 transitions. [2020-10-16 03:26:35,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2364 transitions. [2020-10-16 03:26:35,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:35,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2364 transitions. [2020-10-16 03:26:35,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 03:26:35,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 03:26:35,578 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 03:26:35,578 INFO L185 Difference]: Start difference. First operand has 514 places, 341 transitions, 12761 flow. Second operand 35 states and 2364 transitions. [2020-10-16 03:26:35,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 373 transitions, 16129 flow [2020-10-16 03:26:36,318 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 03:26:36,329 INFO L241 Difference]: Finished difference. Result has 517 places, 342 transitions, 12651 flow [2020-10-16 03:26:36,329 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 03:26:36,329 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 499 predicate places. [2020-10-16 03:26:36,329 INFO L481 AbstractCegarLoop]: Abstraction has has 517 places, 342 transitions, 12651 flow [2020-10-16 03:26:36,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 03:26:36,329 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:36,330 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:36,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:36,530 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:36,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1136241500, now seen corresponding path program 79 times [2020-10-16 03:26:36,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:36,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368278407] [2020-10-16 03:26:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:36,782 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 03:26:36,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368278407] [2020-10-16 03:26:36,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80942508] [2020-10-16 03:26:36,783 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 03:26:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:36,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:26:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:36,845 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 03:26:36,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:36,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 03:26:36,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845405067] [2020-10-16 03:26:36,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 03:26:36,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:36,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 03:26:36,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 03:26:36,847 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:36,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 342 transitions, 12651 flow. Second operand 20 states. [2020-10-16 03:26:36,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:36,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:36,847 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:37,650 INFO L129 PetriNetUnfolder]: 323/875 cut-off events. [2020-10-16 03:26:37,650 INFO L130 PetriNetUnfolder]: For 179591/179597 co-relation queries the response was YES. [2020-10-16 03:26:37,665 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 03:26:37,675 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 296 selfloop transitions, 60 changer transitions 0/363 dead transitions. [2020-10-16 03:26:37,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 363 transitions, 15099 flow [2020-10-16 03:26:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 03:26:37,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 03:26:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1479 transitions. [2020-10-16 03:26:37,677 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6722727272727272 [2020-10-16 03:26:37,677 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1479 transitions. [2020-10-16 03:26:37,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1479 transitions. [2020-10-16 03:26:37,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:37,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1479 transitions. [2020-10-16 03:26:37,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 03:26:37,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 03:26:37,679 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 03:26:37,679 INFO L185 Difference]: Start difference. First operand has 517 places, 342 transitions, 12651 flow. Second operand 22 states and 1479 transitions. [2020-10-16 03:26:37,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 363 transitions, 15099 flow [2020-10-16 03:26:38,460 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 03:26:38,470 INFO L241 Difference]: Finished difference. Result has 508 places, 344 transitions, 12331 flow [2020-10-16 03:26:38,471 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 03:26:38,471 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 490 predicate places. [2020-10-16 03:26:38,471 INFO L481 AbstractCegarLoop]: Abstraction has has 508 places, 344 transitions, 12331 flow [2020-10-16 03:26:38,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 03:26:38,471 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:38,472 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:38,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:38,672 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash -634419144, now seen corresponding path program 80 times [2020-10-16 03:26:38,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:38,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852974431] [2020-10-16 03:26:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:38,925 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 03:26:38,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852974431] [2020-10-16 03:26:38,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630853826] [2020-10-16 03:26:38,925 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 03:26:38,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:26:38,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:26:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:39,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:39,021 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 03:26:39,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:39,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 03:26:39,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039004517] [2020-10-16 03:26:39,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 03:26:39,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 03:26:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 03:26:39,023 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:39,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 344 transitions, 12331 flow. Second operand 21 states. [2020-10-16 03:26:39,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:39,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:39,024 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:39,966 INFO L129 PetriNetUnfolder]: 327/887 cut-off events. [2020-10-16 03:26:39,967 INFO L130 PetriNetUnfolder]: For 177785/177787 co-relation queries the response was YES. [2020-10-16 03:26:39,979 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 03:26:39,989 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 270 selfloop transitions, 90 changer transitions 0/367 dead transitions. [2020-10-16 03:26:39,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 367 transitions, 14844 flow [2020-10-16 03:26:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 03:26:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 03:26:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1547 transitions. [2020-10-16 03:26:39,991 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.672608695652174 [2020-10-16 03:26:39,991 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1547 transitions. [2020-10-16 03:26:39,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1547 transitions. [2020-10-16 03:26:39,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:39,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1547 transitions. [2020-10-16 03:26:39,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 03:26:39,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 03:26:39,993 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 03:26:39,993 INFO L185 Difference]: Start difference. First operand has 508 places, 344 transitions, 12331 flow. Second operand 23 states and 1547 transitions. [2020-10-16 03:26:39,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 367 transitions, 14844 flow [2020-10-16 03:26:40,744 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 03:26:40,754 INFO L241 Difference]: Finished difference. Result has 513 places, 348 transitions, 12536 flow [2020-10-16 03:26:40,755 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 03:26:40,755 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 495 predicate places. [2020-10-16 03:26:40,755 INFO L481 AbstractCegarLoop]: Abstraction has has 513 places, 348 transitions, 12536 flow [2020-10-16 03:26:40,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 03:26:40,755 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:40,755 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:40,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:40,956 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:40,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1759549824, now seen corresponding path program 81 times [2020-10-16 03:26:40,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:40,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214315143] [2020-10-16 03:26:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:41,191 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 03:26:41,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214315143] [2020-10-16 03:26:41,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977904884] [2020-10-16 03:26:41,191 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 03:26:41,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 03:26:41,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:41,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:26:41,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:41,264 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 03:26:41,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:41,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 03:26:41,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490400459] [2020-10-16 03:26:41,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 03:26:41,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:41,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 03:26:41,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 03:26:41,267 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:41,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 348 transitions, 12536 flow. Second operand 20 states. [2020-10-16 03:26:41,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:41,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:41,267 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:42,142 INFO L129 PetriNetUnfolder]: 331/899 cut-off events. [2020-10-16 03:26:42,142 INFO L130 PetriNetUnfolder]: For 185375/185377 co-relation queries the response was YES. [2020-10-16 03:26:42,158 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 03:26:42,168 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 236 selfloop transitions, 130 changer transitions 0/373 dead transitions. [2020-10-16 03:26:42,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 373 transitions, 15253 flow [2020-10-16 03:26:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 03:26:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 03:26:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1615 transitions. [2020-10-16 03:26:42,169 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6729166666666667 [2020-10-16 03:26:42,169 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1615 transitions. [2020-10-16 03:26:42,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1615 transitions. [2020-10-16 03:26:42,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:42,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1615 transitions. [2020-10-16 03:26:42,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 03:26:42,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 03:26:42,172 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 03:26:42,172 INFO L185 Difference]: Start difference. First operand has 513 places, 348 transitions, 12536 flow. Second operand 24 states and 1615 transitions. [2020-10-16 03:26:42,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 373 transitions, 15253 flow [2020-10-16 03:26:43,021 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 03:26:43,031 INFO L241 Difference]: Finished difference. Result has 519 places, 352 transitions, 12777 flow [2020-10-16 03:26:43,031 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 03:26:43,032 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 501 predicate places. [2020-10-16 03:26:43,032 INFO L481 AbstractCegarLoop]: Abstraction has has 519 places, 352 transitions, 12777 flow [2020-10-16 03:26:43,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 03:26:43,032 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:43,032 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:43,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:43,233 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash -659168028, now seen corresponding path program 82 times [2020-10-16 03:26:43,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:43,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801858301] [2020-10-16 03:26:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:43,478 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 03:26:43,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801858301] [2020-10-16 03:26:43,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769737947] [2020-10-16 03:26:43,479 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 03:26:43,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:26:43,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:43,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:26:43,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:43,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:43,559 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 03:26:43,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:43,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 03:26:43,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80236758] [2020-10-16 03:26:43,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 03:26:43,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:43,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 03:26:43,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-16 03:26:43,561 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:43,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 352 transitions, 12777 flow. Second operand 21 states. [2020-10-16 03:26:43,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:43,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:43,562 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:44,545 INFO L129 PetriNetUnfolder]: 335/911 cut-off events. [2020-10-16 03:26:44,546 INFO L130 PetriNetUnfolder]: For 187367/187369 co-relation queries the response was YES. [2020-10-16 03:26:44,561 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 03:26:44,572 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 214 selfloop transitions, 156 changer transitions 0/377 dead transitions. [2020-10-16 03:26:44,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 377 transitions, 15502 flow [2020-10-16 03:26:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 03:26:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 03:26:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1683 transitions. [2020-10-16 03:26:44,573 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6732 [2020-10-16 03:26:44,574 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1683 transitions. [2020-10-16 03:26:44,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1683 transitions. [2020-10-16 03:26:44,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:44,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1683 transitions. [2020-10-16 03:26:44,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 03:26:44,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 03:26:44,577 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 03:26:44,577 INFO L185 Difference]: Start difference. First operand has 519 places, 352 transitions, 12777 flow. Second operand 25 states and 1683 transitions. [2020-10-16 03:26:44,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 377 transitions, 15502 flow [2020-10-16 03:26:45,524 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 03:26:45,535 INFO L241 Difference]: Finished difference. Result has 525 places, 356 transitions, 13010 flow [2020-10-16 03:26:45,535 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 03:26:45,535 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 507 predicate places. [2020-10-16 03:26:45,535 INFO L481 AbstractCegarLoop]: Abstraction has has 525 places, 356 transitions, 13010 flow [2020-10-16 03:26:45,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 03:26:45,536 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:45,536 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:45,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:45,736 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:45,737 INFO L82 PathProgramCache]: Analyzing trace with hash 29153762, now seen corresponding path program 83 times [2020-10-16 03:26:45,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:45,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686333516] [2020-10-16 03:26:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:45,961 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 03:26:45,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686333516] [2020-10-16 03:26:45,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297771354] [2020-10-16 03:26:45,962 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 03:26:46,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 03:26:46,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:46,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:26:46,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:46,029 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 03:26:46,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:46,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 03:26:46,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31434426] [2020-10-16 03:26:46,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 03:26:46,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:46,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 03:26:46,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 03:26:46,031 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:46,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 356 transitions, 13010 flow. Second operand 20 states. [2020-10-16 03:26:46,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:46,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:46,032 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:46,973 INFO L129 PetriNetUnfolder]: 337/917 cut-off events. [2020-10-16 03:26:46,973 INFO L130 PetriNetUnfolder]: For 188484/188490 co-relation queries the response was YES. [2020-10-16 03:26:46,989 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 03:26:47,000 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 182 selfloop transitions, 192 changer transitions 0/381 dead transitions. [2020-10-16 03:26:47,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 381 transitions, 15828 flow [2020-10-16 03:26:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 03:26:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 03:26:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1751 transitions. [2020-10-16 03:26:47,002 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734615384615384 [2020-10-16 03:26:47,002 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1751 transitions. [2020-10-16 03:26:47,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1751 transitions. [2020-10-16 03:26:47,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:47,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1751 transitions. [2020-10-16 03:26:47,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 03:26:47,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 03:26:47,004 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 03:26:47,004 INFO L185 Difference]: Start difference. First operand has 525 places, 356 transitions, 13010 flow. Second operand 26 states and 1751 transitions. [2020-10-16 03:26:47,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 381 transitions, 15828 flow [2020-10-16 03:26:47,857 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 03:26:47,869 INFO L241 Difference]: Finished difference. Result has 531 places, 358 transitions, 13212 flow [2020-10-16 03:26:47,870 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 03:26:47,870 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 513 predicate places. [2020-10-16 03:26:47,870 INFO L481 AbstractCegarLoop]: Abstraction has has 531 places, 358 transitions, 13212 flow [2020-10-16 03:26:47,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 03:26:47,870 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:47,870 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:48,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:48,071 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:48,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2024698842, now seen corresponding path program 84 times [2020-10-16 03:26:48,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:48,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189070736] [2020-10-16 03:26:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:48,266 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 03:26:48,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189070736] [2020-10-16 03:26:48,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041802305] [2020-10-16 03:26:48,267 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 03:26:48,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 03:26:48,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:48,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:26:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:48,345 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 03:26:48,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:48,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 03:26:48,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390505919] [2020-10-16 03:26:48,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 03:26:48,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 03:26:48,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 03:26:48,350 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:48,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 358 transitions, 13212 flow. Second operand 20 states. [2020-10-16 03:26:48,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:48,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:48,352 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:49,433 INFO L129 PetriNetUnfolder]: 345/941 cut-off events. [2020-10-16 03:26:49,433 INFO L130 PetriNetUnfolder]: For 192853/192855 co-relation queries the response was YES. [2020-10-16 03:26:49,450 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 03:26:49,461 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 110 selfloop transitions, 276 changer transitions 0/393 dead transitions. [2020-10-16 03:26:49,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 393 transitions, 16593 flow [2020-10-16 03:26:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 03:26:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-16 03:26:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2023 transitions. [2020-10-16 03:26:49,463 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743333333333333 [2020-10-16 03:26:49,463 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2023 transitions. [2020-10-16 03:26:49,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2023 transitions. [2020-10-16 03:26:49,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:49,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2023 transitions. [2020-10-16 03:26:49,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-16 03:26:49,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-16 03:26:49,466 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-16 03:26:49,466 INFO L185 Difference]: Start difference. First operand has 531 places, 358 transitions, 13212 flow. Second operand 30 states and 2023 transitions. [2020-10-16 03:26:49,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 393 transitions, 16593 flow [2020-10-16 03:26:50,371 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 03:26:50,382 INFO L241 Difference]: Finished difference. Result has 541 places, 366 transitions, 13797 flow [2020-10-16 03:26:50,382 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 03:26:50,382 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 523 predicate places. [2020-10-16 03:26:50,383 INFO L481 AbstractCegarLoop]: Abstraction has has 541 places, 366 transitions, 13797 flow [2020-10-16 03:26:50,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 03:26:50,383 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:50,383 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:50,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:50,584 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:50,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1504955766, now seen corresponding path program 85 times [2020-10-16 03:26:50,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:50,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091185986] [2020-10-16 03:26:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:50,820 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 03:26:50,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091185986] [2020-10-16 03:26:50,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888028663] [2020-10-16 03:26:50,821 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 03:26:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:50,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:26:50,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:50,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:50,918 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 03:26:50,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:50,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 03:26:50,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693795231] [2020-10-16 03:26:50,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 03:26:50,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:50,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 03:26:50,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-16 03:26:50,921 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:50,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 366 transitions, 13797 flow. Second operand 21 states. [2020-10-16 03:26:50,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:50,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:50,922 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:52,173 INFO L129 PetriNetUnfolder]: 349/953 cut-off events. [2020-10-16 03:26:52,174 INFO L130 PetriNetUnfolder]: For 195415/195417 co-relation queries the response was YES. [2020-10-16 03:26:52,191 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 03:26:52,202 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 100 selfloop transitions, 290 changer transitions 0/397 dead transitions. [2020-10-16 03:26:52,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 397 transitions, 17048 flow [2020-10-16 03:26:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 03:26:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 03:26:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2091 transitions. [2020-10-16 03:26:52,204 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745161290322581 [2020-10-16 03:26:52,204 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2091 transitions. [2020-10-16 03:26:52,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2091 transitions. [2020-10-16 03:26:52,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:52,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2091 transitions. [2020-10-16 03:26:52,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 03:26:52,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 03:26:52,207 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 03:26:52,207 INFO L185 Difference]: Start difference. First operand has 541 places, 366 transitions, 13797 flow. Second operand 31 states and 2091 transitions. [2020-10-16 03:26:52,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 397 transitions, 17048 flow [2020-10-16 03:26:53,141 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 03:26:53,152 INFO L241 Difference]: Finished difference. Result has 549 places, 370 transitions, 14163 flow [2020-10-16 03:26:53,152 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 03:26:53,152 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 531 predicate places. [2020-10-16 03:26:53,152 INFO L481 AbstractCegarLoop]: Abstraction has has 549 places, 370 transitions, 14163 flow [2020-10-16 03:26:53,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 03:26:53,153 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:53,153 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:53,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-16 03:26:53,353 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:53,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:53,354 INFO L82 PathProgramCache]: Analyzing trace with hash 150355464, now seen corresponding path program 86 times [2020-10-16 03:26:53,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:53,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386276322] [2020-10-16 03:26:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:53,563 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 03:26:53,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386276322] [2020-10-16 03:26:53,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998269697] [2020-10-16 03:26:53,563 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 03:26:53,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:26:53,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:53,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:26:53,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:53,629 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 03:26:53,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:53,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 03:26:53,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576784295] [2020-10-16 03:26:53,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 03:26:53,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:53,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 03:26:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 03:26:53,631 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:53,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 370 transitions, 14163 flow. Second operand 20 states. [2020-10-16 03:26:53,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:53,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:53,631 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:54,788 INFO L129 PetriNetUnfolder]: 357/977 cut-off events. [2020-10-16 03:26:54,789 INFO L130 PetriNetUnfolder]: For 199767/199769 co-relation queries the response was YES. [2020-10-16 03:26:54,807 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 03:26:54,818 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 87 selfloop transitions, 314 changer transitions 0/408 dead transitions. [2020-10-16 03:26:54,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 408 transitions, 17742 flow [2020-10-16 03:26:54,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 03:26:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 03:26:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2159 transitions. [2020-10-16 03:26:54,820 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6746875 [2020-10-16 03:26:54,820 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2159 transitions. [2020-10-16 03:26:54,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2159 transitions. [2020-10-16 03:26:54,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:54,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2159 transitions. [2020-10-16 03:26:54,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 03:26:54,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 03:26:54,823 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 03:26:54,823 INFO L185 Difference]: Start difference. First operand has 549 places, 370 transitions, 14163 flow. Second operand 32 states and 2159 transitions. [2020-10-16 03:26:54,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 408 transitions, 17742 flow [2020-10-16 03:26:55,780 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 03:26:55,792 INFO L241 Difference]: Finished difference. Result has 556 places, 379 transitions, 14667 flow [2020-10-16 03:26:55,792 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 03:26:55,793 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 538 predicate places. [2020-10-16 03:26:55,793 INFO L481 AbstractCegarLoop]: Abstraction has has 556 places, 379 transitions, 14667 flow [2020-10-16 03:26:55,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 03:26:55,793 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:55,793 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:55,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:26:55,994 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1082689330, now seen corresponding path program 87 times [2020-10-16 03:26:55,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:55,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359598553] [2020-10-16 03:26:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:56,222 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 03:26:56,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359598553] [2020-10-16 03:26:56,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742354158] [2020-10-16 03:26:56,223 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 03:26:56,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 03:26:56,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:56,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:26:56,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:56,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:56,359 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 03:26:56,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:56,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 03:26:56,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538412644] [2020-10-16 03:26:56,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 03:26:56,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:56,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 03:26:56,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 03:26:56,363 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:56,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 379 transitions, 14667 flow. Second operand 21 states. [2020-10-16 03:26:56,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:56,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:56,365 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:26:57,945 INFO L129 PetriNetUnfolder]: 359/982 cut-off events. [2020-10-16 03:26:57,945 INFO L130 PetriNetUnfolder]: For 201276/201282 co-relation queries the response was YES. [2020-10-16 03:26:57,978 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 03:26:57,996 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 61 selfloop transitions, 344 changer transitions 0/412 dead transitions. [2020-10-16 03:26:57,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 412 transitions, 18211 flow [2020-10-16 03:26:57,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 03:26:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 03:26:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2363 transitions. [2020-10-16 03:26:58,000 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751428571428572 [2020-10-16 03:26:58,000 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2363 transitions. [2020-10-16 03:26:58,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2363 transitions. [2020-10-16 03:26:58,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:26:58,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2363 transitions. [2020-10-16 03:26:58,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 03:26:58,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 03:26:58,006 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 03:26:58,006 INFO L185 Difference]: Start difference. First operand has 556 places, 379 transitions, 14667 flow. Second operand 35 states and 2363 transitions. [2020-10-16 03:26:58,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 412 transitions, 18211 flow [2020-10-16 03:26:59,191 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 03:26:59,202 INFO L241 Difference]: Finished difference. Result has 566 places, 381 transitions, 15027 flow [2020-10-16 03:26:59,203 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 03:26:59,203 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 548 predicate places. [2020-10-16 03:26:59,203 INFO L481 AbstractCegarLoop]: Abstraction has has 566 places, 381 transitions, 15027 flow [2020-10-16 03:26:59,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 03:26:59,203 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:26:59,203 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:26:59,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 03:26:59,404 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:26:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:26:59,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1082182480, now seen corresponding path program 88 times [2020-10-16 03:26:59,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:26:59,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956791702] [2020-10-16 03:26:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:26:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:26:59,596 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 03:26:59,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956791702] [2020-10-16 03:26:59,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547649340] [2020-10-16 03:26:59,597 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 03:26:59,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:26:59,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:26:59,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:26:59,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:26:59,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:26:59,682 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 03:26:59,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:26:59,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 03:26:59,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615917406] [2020-10-16 03:26:59,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 03:26:59,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:26:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 03:26:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-16 03:26:59,685 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:26:59,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 381 transitions, 15027 flow. Second operand 21 states. [2020-10-16 03:26:59,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:26:59,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:26:59,686 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:01,244 INFO L129 PetriNetUnfolder]: 363/992 cut-off events. [2020-10-16 03:27:01,245 INFO L130 PetriNetUnfolder]: For 203857/203859 co-relation queries the response was YES. [2020-10-16 03:27:01,264 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 03:27:01,275 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 51 selfloop transitions, 360 changer transitions 0/418 dead transitions. [2020-10-16 03:27:01,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 418 transitions, 18887 flow [2020-10-16 03:27:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 03:27:01,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 03:27:01,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2499 transitions. [2020-10-16 03:27:01,277 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754054054054054 [2020-10-16 03:27:01,277 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2499 transitions. [2020-10-16 03:27:01,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2499 transitions. [2020-10-16 03:27:01,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:01,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2499 transitions. [2020-10-16 03:27:01,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 03:27:01,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 03:27:01,280 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 03:27:01,280 INFO L185 Difference]: Start difference. First operand has 566 places, 381 transitions, 15027 flow. Second operand 37 states and 2499 transitions. [2020-10-16 03:27:01,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 418 transitions, 18887 flow [2020-10-16 03:27:02,176 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 03:27:02,191 INFO L241 Difference]: Finished difference. Result has 572 places, 385 transitions, 15402 flow [2020-10-16 03:27:02,192 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 03:27:02,192 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 554 predicate places. [2020-10-16 03:27:02,192 INFO L481 AbstractCegarLoop]: Abstraction has has 572 places, 385 transitions, 15402 flow [2020-10-16 03:27:02,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 03:27:02,192 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:02,193 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:02,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:02,406 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:02,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:02,406 INFO L82 PathProgramCache]: Analyzing trace with hash -227271742, now seen corresponding path program 89 times [2020-10-16 03:27:02,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:02,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395462021] [2020-10-16 03:27:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:02,595 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 03:27:02,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395462021] [2020-10-16 03:27:02,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211640044] [2020-10-16 03:27:02,596 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 03:27:02,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 03:27:02,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:02,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 03:27:02,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:02,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:27:02,694 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 03:27:02,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:02,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 03:27:02,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545980199] [2020-10-16 03:27:02,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 03:27:02,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:02,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 03:27:02,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-16 03:27:02,697 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:02,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 385 transitions, 15402 flow. Second operand 21 states. [2020-10-16 03:27:02,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:02,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:02,697 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:04,173 INFO L129 PetriNetUnfolder]: 366/997 cut-off events. [2020-10-16 03:27:04,173 INFO L130 PetriNetUnfolder]: For 210052/210058 co-relation queries the response was YES. [2020-10-16 03:27:04,192 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 03:27:04,203 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 101 selfloop transitions, 312 changer transitions 0/420 dead transitions. [2020-10-16 03:27:04,204 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 420 transitions, 19154 flow [2020-10-16 03:27:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 03:27:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 03:27:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2431 transitions. [2020-10-16 03:27:04,206 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752777777777778 [2020-10-16 03:27:04,206 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2431 transitions. [2020-10-16 03:27:04,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2431 transitions. [2020-10-16 03:27:04,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:04,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2431 transitions. [2020-10-16 03:27:04,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 03:27:04,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 03:27:04,209 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 03:27:04,209 INFO L185 Difference]: Start difference. First operand has 572 places, 385 transitions, 15402 flow. Second operand 36 states and 2431 transitions. [2020-10-16 03:27:04,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 420 transitions, 19154 flow [2020-10-16 03:27:05,131 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 03:27:05,143 INFO L241 Difference]: Finished difference. Result has 577 places, 388 transitions, 15499 flow [2020-10-16 03:27:05,143 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 03:27:05,144 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 559 predicate places. [2020-10-16 03:27:05,144 INFO L481 AbstractCegarLoop]: Abstraction has has 577 places, 388 transitions, 15499 flow [2020-10-16 03:27:05,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 03:27:05,144 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:05,144 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:05,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:05,345 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:05,345 INFO L82 PathProgramCache]: Analyzing trace with hash 812097795, now seen corresponding path program 90 times [2020-10-16 03:27:05,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:05,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699546124] [2020-10-16 03:27:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:05,556 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 03:27:05,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699546124] [2020-10-16 03:27:05,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360999708] [2020-10-16 03:27:05,556 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 03:27:05,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 03:27:05,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:05,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 03:27:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:05,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:27:05,655 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 03:27:05,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:05,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 03:27:05,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423365749] [2020-10-16 03:27:05,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 03:27:05,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:05,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 03:27:05,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-16 03:27:05,658 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:05,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 388 transitions, 15499 flow. Second operand 22 states. [2020-10-16 03:27:05,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:05,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:05,658 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:07,262 INFO L129 PetriNetUnfolder]: 369/1005 cut-off events. [2020-10-16 03:27:07,262 INFO L130 PetriNetUnfolder]: For 216536/216542 co-relation queries the response was YES. [2020-10-16 03:27:07,283 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 03:27:07,294 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 54 selfloop transitions, 364 changer transitions 0/425 dead transitions. [2020-10-16 03:27:07,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 425 transitions, 19459 flow [2020-10-16 03:27:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 03:27:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 03:27:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2431 transitions. [2020-10-16 03:27:07,296 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752777777777778 [2020-10-16 03:27:07,296 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2431 transitions. [2020-10-16 03:27:07,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2431 transitions. [2020-10-16 03:27:07,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:07,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2431 transitions. [2020-10-16 03:27:07,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 03:27:07,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 03:27:07,299 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 03:27:07,299 INFO L185 Difference]: Start difference. First operand has 577 places, 388 transitions, 15499 flow. Second operand 36 states and 2431 transitions. [2020-10-16 03:27:07,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 425 transitions, 19459 flow [2020-10-16 03:27:08,338 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 03:27:08,351 INFO L241 Difference]: Finished difference. Result has 578 places, 391 transitions, 15787 flow [2020-10-16 03:27:08,352 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 03:27:08,352 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 560 predicate places. [2020-10-16 03:27:08,352 INFO L481 AbstractCegarLoop]: Abstraction has has 578 places, 391 transitions, 15787 flow [2020-10-16 03:27:08,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 03:27:08,352 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:08,352 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:08,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:08,553 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:08,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:08,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1168108432, now seen corresponding path program 91 times [2020-10-16 03:27:08,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:08,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562069372] [2020-10-16 03:27:08,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:08,826 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 03:27:08,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562069372] [2020-10-16 03:27:08,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325361138] [2020-10-16 03:27:08,827 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 03:27:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:08,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 03:27:08,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:08,886 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 03:27:08,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:08,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 03:27:08,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871141739] [2020-10-16 03:27:08,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 03:27:08,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:08,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 03:27:08,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-16 03:27:08,889 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:08,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 391 transitions, 15787 flow. Second operand 21 states. [2020-10-16 03:27:08,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:08,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:08,889 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:09,847 INFO L129 PetriNetUnfolder]: 371/1011 cut-off events. [2020-10-16 03:27:09,847 INFO L130 PetriNetUnfolder]: For 224611/224617 co-relation queries the response was YES. [2020-10-16 03:27:09,867 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 03:27:09,879 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 376 selfloop transitions, 29 changer transitions 0/412 dead transitions. [2020-10-16 03:27:09,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 412 transitions, 18411 flow [2020-10-16 03:27:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 03:27:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 03:27:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1478 transitions. [2020-10-16 03:27:09,881 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6718181818181819 [2020-10-16 03:27:09,881 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1478 transitions. [2020-10-16 03:27:09,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1478 transitions. [2020-10-16 03:27:09,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:09,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1478 transitions. [2020-10-16 03:27:09,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 03:27:09,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 03:27:09,884 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 03:27:09,884 INFO L185 Difference]: Start difference. First operand has 578 places, 391 transitions, 15787 flow. Second operand 22 states and 1478 transitions. [2020-10-16 03:27:09,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 412 transitions, 18411 flow [2020-10-16 03:27:10,963 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 03:27:10,976 INFO L241 Difference]: Finished difference. Result has 569 places, 393 transitions, 15189 flow [2020-10-16 03:27:10,977 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 03:27:10,977 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 551 predicate places. [2020-10-16 03:27:10,977 INFO L481 AbstractCegarLoop]: Abstraction has has 569 places, 393 transitions, 15189 flow [2020-10-16 03:27:10,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 03:27:10,977 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:10,977 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:11,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:11,178 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:11,178 INFO L82 PathProgramCache]: Analyzing trace with hash 849564896, now seen corresponding path program 92 times [2020-10-16 03:27:11,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:11,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056578930] [2020-10-16 03:27:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:11,450 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 03:27:11,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056578930] [2020-10-16 03:27:11,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738974675] [2020-10-16 03:27:11,451 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 03:27:11,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:27:11,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:11,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 03:27:11,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:11,513 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 03:27:11,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:11,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 03:27:11,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038774441] [2020-10-16 03:27:11,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 03:27:11,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:11,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 03:27:11,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-16 03:27:11,515 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:11,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 393 transitions, 15189 flow. Second operand 21 states. [2020-10-16 03:27:11,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:11,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:11,516 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:12,567 INFO L129 PetriNetUnfolder]: 373/1016 cut-off events. [2020-10-16 03:27:12,568 INFO L130 PetriNetUnfolder]: For 236705/236707 co-relation queries the response was YES. [2020-10-16 03:27:12,587 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 03:27:12,599 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 342 selfloop transitions, 67 changer transitions 0/416 dead transitions. [2020-10-16 03:27:12,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 416 transitions, 18039 flow [2020-10-16 03:27:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 03:27:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 03:27:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1749 transitions. [2020-10-16 03:27:12,601 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6726923076923077 [2020-10-16 03:27:12,601 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1749 transitions. [2020-10-16 03:27:12,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1749 transitions. [2020-10-16 03:27:12,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:12,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1749 transitions. [2020-10-16 03:27:12,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 03:27:12,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 03:27:12,603 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 03:27:12,603 INFO L185 Difference]: Start difference. First operand has 569 places, 393 transitions, 15189 flow. Second operand 26 states and 1749 transitions. [2020-10-16 03:27:12,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 416 transitions, 18039 flow [2020-10-16 03:27:13,666 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 03:27:13,678 INFO L241 Difference]: Finished difference. Result has 577 places, 395 transitions, 15316 flow [2020-10-16 03:27:13,678 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 03:27:13,678 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 559 predicate places. [2020-10-16 03:27:13,678 INFO L481 AbstractCegarLoop]: Abstraction has has 577 places, 395 transitions, 15316 flow [2020-10-16 03:27:13,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 03:27:13,679 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:13,679 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:13,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:13,879 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:13,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1517901494, now seen corresponding path program 93 times [2020-10-16 03:27:13,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:13,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241780746] [2020-10-16 03:27:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:14,102 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 03:27:14,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241780746] [2020-10-16 03:27:14,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289969475] [2020-10-16 03:27:14,103 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 03:27:14,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 03:27:14,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:14,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 03:27:14,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:14,179 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 03:27:14,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:14,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 03:27:14,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933730882] [2020-10-16 03:27:14,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 03:27:14,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:14,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 03:27:14,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-16 03:27:14,181 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:14,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 395 transitions, 15316 flow. Second operand 21 states. [2020-10-16 03:27:14,182 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:14,182 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:14,182 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:15,588 INFO L129 PetriNetUnfolder]: 375/1022 cut-off events. [2020-10-16 03:27:15,588 INFO L130 PetriNetUnfolder]: For 244020/244022 co-relation queries the response was YES. [2020-10-16 03:27:15,605 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 03:27:15,617 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 115 selfloop transitions, 306 changer transitions 0/428 dead transitions. [2020-10-16 03:27:15,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 428 transitions, 19102 flow [2020-10-16 03:27:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 03:27:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 03:27:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2429 transitions. [2020-10-16 03:27:15,619 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6747222222222222 [2020-10-16 03:27:15,619 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2429 transitions. [2020-10-16 03:27:15,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2429 transitions. [2020-10-16 03:27:15,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:15,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2429 transitions. [2020-10-16 03:27:15,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 03:27:15,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 03:27:15,622 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 03:27:15,622 INFO L185 Difference]: Start difference. First operand has 577 places, 395 transitions, 15316 flow. Second operand 36 states and 2429 transitions. [2020-10-16 03:27:15,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 428 transitions, 19102 flow [2020-10-16 03:27:16,789 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 03:27:16,802 INFO L241 Difference]: Finished difference. Result has 600 places, 397 transitions, 15948 flow [2020-10-16 03:27:16,803 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 03:27:16,803 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 582 predicate places. [2020-10-16 03:27:16,803 INFO L481 AbstractCegarLoop]: Abstraction has has 600 places, 397 transitions, 15948 flow [2020-10-16 03:27:16,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 03:27:16,803 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:16,803 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:17,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:17,004 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:17,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1056938158, now seen corresponding path program 94 times [2020-10-16 03:27:17,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:17,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594345589] [2020-10-16 03:27:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:17,223 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 03:27:17,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594345589] [2020-10-16 03:27:17,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896098143] [2020-10-16 03:27:17,224 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 03:27:17,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:27:17,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:17,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 03:27:17,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:17,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:27:17,314 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 03:27:17,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:17,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 03:27:17,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860972681] [2020-10-16 03:27:17,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 03:27:17,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:17,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 03:27:17,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 03:27:17,317 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:17,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 397 transitions, 15948 flow. Second operand 22 states. [2020-10-16 03:27:17,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:17,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:17,318 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:18,843 INFO L129 PetriNetUnfolder]: 377/1028 cut-off events. [2020-10-16 03:27:18,844 INFO L130 PetriNetUnfolder]: For 244893/244899 co-relation queries the response was YES. [2020-10-16 03:27:18,864 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 03:27:18,876 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 109 selfloop transitions, 314 changer transitions 0/430 dead transitions. [2020-10-16 03:27:18,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 430 transitions, 19738 flow [2020-10-16 03:27:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 03:27:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 03:27:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2362 transitions. [2020-10-16 03:27:18,878 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748571428571428 [2020-10-16 03:27:18,878 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2362 transitions. [2020-10-16 03:27:18,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2362 transitions. [2020-10-16 03:27:18,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:18,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2362 transitions. [2020-10-16 03:27:18,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 03:27:18,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 03:27:18,881 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 03:27:18,881 INFO L185 Difference]: Start difference. First operand has 600 places, 397 transitions, 15948 flow. Second operand 35 states and 2362 transitions. [2020-10-16 03:27:18,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 430 transitions, 19738 flow [2020-10-16 03:27:20,114 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 03:27:20,126 INFO L241 Difference]: Finished difference. Result has 603 places, 399 transitions, 16086 flow [2020-10-16 03:27:20,127 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 03:27:20,127 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 585 predicate places. [2020-10-16 03:27:20,127 INFO L481 AbstractCegarLoop]: Abstraction has has 603 places, 399 transitions, 16086 flow [2020-10-16 03:27:20,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 03:27:20,127 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:20,127 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:20,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-16 03:27:20,328 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1544511118, now seen corresponding path program 95 times [2020-10-16 03:27:20,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:20,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641224832] [2020-10-16 03:27:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:20,538 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 03:27:20,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641224832] [2020-10-16 03:27:20,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944395218] [2020-10-16 03:27:20,539 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 03:27:20,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 03:27:20,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:20,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 03:27:20,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:20,613 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 03:27:20,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:20,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 03:27:20,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385087457] [2020-10-16 03:27:20,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 03:27:20,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:20,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 03:27:20,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-16 03:27:20,618 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:20,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 399 transitions, 16086 flow. Second operand 21 states. [2020-10-16 03:27:20,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:20,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:20,619 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:22,216 INFO L129 PetriNetUnfolder]: 388/1055 cut-off events. [2020-10-16 03:27:22,216 INFO L130 PetriNetUnfolder]: For 252940/252946 co-relation queries the response was YES. [2020-10-16 03:27:22,232 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 03:27:22,245 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 83 selfloop transitions, 353 changer transitions 0/443 dead transitions. [2020-10-16 03:27:22,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 443 transitions, 20728 flow [2020-10-16 03:27:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 03:27:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 03:27:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2702 transitions. [2020-10-16 03:27:22,247 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 03:27:22,247 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2702 transitions. [2020-10-16 03:27:22,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2702 transitions. [2020-10-16 03:27:22,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:22,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2702 transitions. [2020-10-16 03:27:22,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 03:27:22,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 03:27:22,250 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 03:27:22,251 INFO L185 Difference]: Start difference. First operand has 603 places, 399 transitions, 16086 flow. Second operand 40 states and 2702 transitions. [2020-10-16 03:27:22,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 443 transitions, 20728 flow [2020-10-16 03:27:23,395 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 03:27:23,409 INFO L241 Difference]: Finished difference. Result has 614 places, 407 transitions, 16732 flow [2020-10-16 03:27:23,409 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 03:27:23,409 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 596 predicate places. [2020-10-16 03:27:23,409 INFO L481 AbstractCegarLoop]: Abstraction has has 614 places, 407 transitions, 16732 flow [2020-10-16 03:27:23,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 03:27:23,409 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:23,410 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:23,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:23,610 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:23,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1544527858, now seen corresponding path program 96 times [2020-10-16 03:27:23,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:23,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667482482] [2020-10-16 03:27:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:23,830 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 03:27:23,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667482482] [2020-10-16 03:27:23,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188308810] [2020-10-16 03:27:23,831 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 03:27:23,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 03:27:23,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:23,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 03:27:23,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:23,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:27:23,972 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 03:27:23,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:23,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 03:27:23,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117555025] [2020-10-16 03:27:23,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 03:27:23,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:23,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 03:27:23,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 03:27:23,977 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:23,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 407 transitions, 16732 flow. Second operand 22 states. [2020-10-16 03:27:23,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:23,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:23,979 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:25,728 INFO L129 PetriNetUnfolder]: 385/1049 cut-off events. [2020-10-16 03:27:25,728 INFO L130 PetriNetUnfolder]: For 268500/268502 co-relation queries the response was YES. [2020-10-16 03:27:25,750 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 03:27:25,762 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 82 selfloop transitions, 354 changer transitions 0/443 dead transitions. [2020-10-16 03:27:25,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 443 transitions, 20928 flow [2020-10-16 03:27:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 03:27:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 03:27:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2634 transitions. [2020-10-16 03:27:25,765 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753846153846154 [2020-10-16 03:27:25,765 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2634 transitions. [2020-10-16 03:27:25,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2634 transitions. [2020-10-16 03:27:25,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:25,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2634 transitions. [2020-10-16 03:27:25,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-16 03:27:25,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-16 03:27:25,768 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-16 03:27:25,768 INFO L185 Difference]: Start difference. First operand has 614 places, 407 transitions, 16732 flow. Second operand 39 states and 2634 transitions. [2020-10-16 03:27:25,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 443 transitions, 20928 flow [2020-10-16 03:27:26,874 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 03:27:26,891 INFO L241 Difference]: Finished difference. Result has 619 places, 408 transitions, 16590 flow [2020-10-16 03:27:26,891 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 03:27:26,892 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 601 predicate places. [2020-10-16 03:27:26,892 INFO L481 AbstractCegarLoop]: Abstraction has has 619 places, 408 transitions, 16590 flow [2020-10-16 03:27:26,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 03:27:26,892 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:26,892 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:27,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-16 03:27:27,105 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash 376305371, now seen corresponding path program 97 times [2020-10-16 03:27:27,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:27,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413208358] [2020-10-16 03:27:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:27,419 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 03:27:27,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413208358] [2020-10-16 03:27:27,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093574995] [2020-10-16 03:27:27,420 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 03:27:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:27,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:27:27,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:27,480 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 03:27:27,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:27,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 03:27:27,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22920645] [2020-10-16 03:27:27,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 03:27:27,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:27,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 03:27:27,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 03:27:27,482 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:27,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 408 transitions, 16590 flow. Second operand 22 states. [2020-10-16 03:27:27,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:27,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:27,483 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:28,550 INFO L129 PetriNetUnfolder]: 387/1055 cut-off events. [2020-10-16 03:27:28,550 INFO L130 PetriNetUnfolder]: For 275599/275601 co-relation queries the response was YES. [2020-10-16 03:27:28,572 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 03:27:28,585 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 360 selfloop transitions, 64 changer transitions 0/431 dead transitions. [2020-10-16 03:27:28,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 431 transitions, 19570 flow [2020-10-16 03:27:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 03:27:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 03:27:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1613 transitions. [2020-10-16 03:27:28,586 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6720833333333334 [2020-10-16 03:27:28,586 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1613 transitions. [2020-10-16 03:27:28,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1613 transitions. [2020-10-16 03:27:28,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:28,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1613 transitions. [2020-10-16 03:27:28,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 03:27:28,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 03:27:28,589 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 03:27:28,589 INFO L185 Difference]: Start difference. First operand has 619 places, 408 transitions, 16590 flow. Second operand 24 states and 1613 transitions. [2020-10-16 03:27:28,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 431 transitions, 19570 flow [2020-10-16 03:27:29,780 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 03:27:29,793 INFO L241 Difference]: Finished difference. Result has 608 places, 410 transitions, 16160 flow [2020-10-16 03:27:29,793 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 03:27:29,794 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 590 predicate places. [2020-10-16 03:27:29,794 INFO L481 AbstractCegarLoop]: Abstraction has has 608 places, 410 transitions, 16160 flow [2020-10-16 03:27:29,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 03:27:29,794 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:29,794 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:29,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:29,995 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:29,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:29,995 INFO L82 PathProgramCache]: Analyzing trace with hash 642170241, now seen corresponding path program 98 times [2020-10-16 03:27:29,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:29,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212977575] [2020-10-16 03:27:29,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:30,307 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 03:27:30,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212977575] [2020-10-16 03:27:30,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197010703] [2020-10-16 03:27:30,307 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 03:27:30,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:27:30,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:30,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:27:30,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:30,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:27:30,410 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 03:27:30,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:30,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 03:27:30,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543355905] [2020-10-16 03:27:30,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 03:27:30,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:30,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 03:27:30,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 03:27:30,413 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:30,414 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 410 transitions, 16160 flow. Second operand 23 states. [2020-10-16 03:27:30,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:30,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:30,414 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:31,556 INFO L129 PetriNetUnfolder]: 391/1067 cut-off events. [2020-10-16 03:27:31,556 INFO L130 PetriNetUnfolder]: For 272673/272679 co-relation queries the response was YES. [2020-10-16 03:27:31,593 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 03:27:31,609 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 330 selfloop transitions, 98 changer transitions 0/435 dead transitions. [2020-10-16 03:27:31,610 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 435 transitions, 19191 flow [2020-10-16 03:27:31,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 03:27:31,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 03:27:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1681 transitions. [2020-10-16 03:27:31,611 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6724 [2020-10-16 03:27:31,611 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1681 transitions. [2020-10-16 03:27:31,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1681 transitions. [2020-10-16 03:27:31,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:31,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1681 transitions. [2020-10-16 03:27:31,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 03:27:31,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 03:27:31,614 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 03:27:31,614 INFO L185 Difference]: Start difference. First operand has 608 places, 410 transitions, 16160 flow. Second operand 25 states and 1681 transitions. [2020-10-16 03:27:31,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 435 transitions, 19191 flow [2020-10-16 03:27:32,699 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 03:27:32,711 INFO L241 Difference]: Finished difference. Result has 612 places, 414 transitions, 16359 flow [2020-10-16 03:27:32,712 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 03:27:32,712 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 594 predicate places. [2020-10-16 03:27:32,712 INFO L481 AbstractCegarLoop]: Abstraction has has 612 places, 414 transitions, 16359 flow [2020-10-16 03:27:32,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 03:27:32,712 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:32,712 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:32,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:32,916 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1093214603, now seen corresponding path program 99 times [2020-10-16 03:27:32,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:32,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654423766] [2020-10-16 03:27:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:33,209 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 03:27:33,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654423766] [2020-10-16 03:27:33,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833671543] [2020-10-16 03:27:33,210 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 03:27:33,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 03:27:33,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:33,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:27:33,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:33,279 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 03:27:33,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:33,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 03:27:33,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164739401] [2020-10-16 03:27:33,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 03:27:33,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:33,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 03:27:33,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 03:27:33,281 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:33,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 414 transitions, 16359 flow. Second operand 22 states. [2020-10-16 03:27:33,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:33,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:33,281 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:34,435 INFO L129 PetriNetUnfolder]: 393/1073 cut-off events. [2020-10-16 03:27:34,435 INFO L130 PetriNetUnfolder]: For 281513/281515 co-relation queries the response was YES. [2020-10-16 03:27:34,457 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 03:27:34,473 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 290 selfloop transitions, 142 changer transitions 0/439 dead transitions. [2020-10-16 03:27:34,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 439 transitions, 19543 flow [2020-10-16 03:27:34,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 03:27:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 03:27:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1749 transitions. [2020-10-16 03:27:34,475 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6726923076923077 [2020-10-16 03:27:34,475 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1749 transitions. [2020-10-16 03:27:34,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1749 transitions. [2020-10-16 03:27:34,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:34,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1749 transitions. [2020-10-16 03:27:34,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 03:27:34,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 03:27:34,478 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 03:27:34,478 INFO L185 Difference]: Start difference. First operand has 612 places, 414 transitions, 16359 flow. Second operand 26 states and 1749 transitions. [2020-10-16 03:27:34,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 439 transitions, 19543 flow [2020-10-16 03:27:35,633 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 03:27:35,649 INFO L241 Difference]: Finished difference. Result has 617 places, 416 transitions, 16527 flow [2020-10-16 03:27:35,650 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 03:27:35,650 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 599 predicate places. [2020-10-16 03:27:35,650 INFO L481 AbstractCegarLoop]: Abstraction has has 617 places, 416 transitions, 16527 flow [2020-10-16 03:27:35,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 03:27:35,650 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:35,650 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:35,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 03:27:35,860 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1470167581, now seen corresponding path program 100 times [2020-10-16 03:27:35,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:35,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872218320] [2020-10-16 03:27:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:36,164 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 03:27:36,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872218320] [2020-10-16 03:27:36,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748707023] [2020-10-16 03:27:36,165 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 03:27:36,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:27:36,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:36,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:27:36,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:36,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:27:36,250 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 03:27:36,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:36,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 03:27:36,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453644188] [2020-10-16 03:27:36,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 03:27:36,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:36,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 03:27:36,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-16 03:27:36,253 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:36,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 416 transitions, 16527 flow. Second operand 23 states. [2020-10-16 03:27:36,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:36,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:36,254 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:37,504 INFO L129 PetriNetUnfolder]: 397/1085 cut-off events. [2020-10-16 03:27:37,505 INFO L130 PetriNetUnfolder]: For 284097/284099 co-relation queries the response was YES. [2020-10-16 03:27:37,528 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 03:27:37,540 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 264 selfloop transitions, 172 changer transitions 0/443 dead transitions. [2020-10-16 03:27:37,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 443 transitions, 19782 flow [2020-10-16 03:27:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 03:27:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-16 03:27:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1817 transitions. [2020-10-16 03:27:37,542 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.672962962962963 [2020-10-16 03:27:37,543 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1817 transitions. [2020-10-16 03:27:37,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1817 transitions. [2020-10-16 03:27:37,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:37,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1817 transitions. [2020-10-16 03:27:37,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-16 03:27:37,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-16 03:27:37,545 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-16 03:27:37,545 INFO L185 Difference]: Start difference. First operand has 617 places, 416 transitions, 16527 flow. Second operand 27 states and 1817 transitions. [2020-10-16 03:27:37,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 443 transitions, 19782 flow [2020-10-16 03:27:38,698 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 03:27:38,712 INFO L241 Difference]: Finished difference. Result has 622 places, 420 transitions, 16754 flow [2020-10-16 03:27:38,713 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 03:27:38,713 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 604 predicate places. [2020-10-16 03:27:38,713 INFO L481 AbstractCegarLoop]: Abstraction has has 622 places, 420 transitions, 16754 flow [2020-10-16 03:27:38,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 03:27:38,713 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:38,713 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:38,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 03:27:38,914 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:38,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:38,915 INFO L82 PathProgramCache]: Analyzing trace with hash 516581379, now seen corresponding path program 101 times [2020-10-16 03:27:38,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:38,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570648665] [2020-10-16 03:27:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:39,175 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 03:27:39,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570648665] [2020-10-16 03:27:39,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744247610] [2020-10-16 03:27:39,176 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 03:27:39,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 03:27:39,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:27:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:39,248 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 03:27:39,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:39,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 03:27:39,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537230726] [2020-10-16 03:27:39,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 03:27:39,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:39,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 03:27:39,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 03:27:39,251 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:39,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 420 transitions, 16754 flow. Second operand 22 states. [2020-10-16 03:27:39,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:39,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:39,251 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:40,550 INFO L129 PetriNetUnfolder]: 405/1109 cut-off events. [2020-10-16 03:27:40,550 INFO L130 PetriNetUnfolder]: For 289573/289575 co-relation queries the response was YES. [2020-10-16 03:27:40,574 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 03:27:40,587 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 184 selfloop transitions, 264 changer transitions 0/455 dead transitions. [2020-10-16 03:27:40,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 455 transitions, 20589 flow [2020-10-16 03:27:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 03:27:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-16 03:27:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2021 transitions. [2020-10-16 03:27:40,590 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6736666666666666 [2020-10-16 03:27:40,590 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2021 transitions. [2020-10-16 03:27:40,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2021 transitions. [2020-10-16 03:27:40,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:40,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2021 transitions. [2020-10-16 03:27:40,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-16 03:27:40,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-16 03:27:40,593 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-16 03:27:40,593 INFO L185 Difference]: Start difference. First operand has 622 places, 420 transitions, 16754 flow. Second operand 30 states and 2021 transitions. [2020-10-16 03:27:40,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 455 transitions, 20589 flow [2020-10-16 03:27:41,867 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 03:27:41,879 INFO L241 Difference]: Finished difference. Result has 631 places, 428 transitions, 17357 flow [2020-10-16 03:27:41,880 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 03:27:41,880 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 613 predicate places. [2020-10-16 03:27:41,880 INFO L481 AbstractCegarLoop]: Abstraction has has 631 places, 428 transitions, 17357 flow [2020-10-16 03:27:41,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 03:27:41,880 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:41,880 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:42,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:42,081 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:42,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:42,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1141503561, now seen corresponding path program 102 times [2020-10-16 03:27:42,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:42,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59874448] [2020-10-16 03:27:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:42,335 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 03:27:42,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59874448] [2020-10-16 03:27:42,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394292841] [2020-10-16 03:27:42,336 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 03:27:42,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 03:27:42,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:27:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:42,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:27:42,427 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 03:27:42,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:42,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 03:27:42,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393781406] [2020-10-16 03:27:42,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 03:27:42,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:42,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 03:27:42,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-16 03:27:42,429 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:42,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 428 transitions, 17357 flow. Second operand 23 states. [2020-10-16 03:27:42,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:42,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:42,430 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:44,358 INFO L129 PetriNetUnfolder]: 409/1121 cut-off events. [2020-10-16 03:27:44,359 INFO L130 PetriNetUnfolder]: For 292583/292585 co-relation queries the response was YES. [2020-10-16 03:27:44,381 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 03:27:44,395 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 136 selfloop transitions, 318 changer transitions 0/461 dead transitions. [2020-10-16 03:27:44,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 461 transitions, 21210 flow [2020-10-16 03:27:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 03:27:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-16 03:27:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2225 transitions. [2020-10-16 03:27:44,397 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2020-10-16 03:27:44,397 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2225 transitions. [2020-10-16 03:27:44,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2225 transitions. [2020-10-16 03:27:44,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:44,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2225 transitions. [2020-10-16 03:27:44,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-16 03:27:44,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-16 03:27:44,400 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-16 03:27:44,400 INFO L185 Difference]: Start difference. First operand has 631 places, 428 transitions, 17357 flow. Second operand 33 states and 2225 transitions. [2020-10-16 03:27:44,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 461 transitions, 21210 flow [2020-10-16 03:27:45,832 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 03:27:45,846 INFO L241 Difference]: Finished difference. Result has 640 places, 432 transitions, 17713 flow [2020-10-16 03:27:45,846 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 03:27:45,846 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 622 predicate places. [2020-10-16 03:27:45,846 INFO L481 AbstractCegarLoop]: Abstraction has has 640 places, 432 transitions, 17713 flow [2020-10-16 03:27:45,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 03:27:45,846 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:45,846 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:46,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 03:27:46,047 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:46,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1537271225, now seen corresponding path program 103 times [2020-10-16 03:27:46,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:46,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042584874] [2020-10-16 03:27:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:46,290 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 03:27:46,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042584874] [2020-10-16 03:27:46,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093231708] [2020-10-16 03:27:46,291 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 03:27:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:46,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:27:46,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:46,362 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 03:27:46,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:46,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 03:27:46,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630871190] [2020-10-16 03:27:46,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 03:27:46,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:46,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 03:27:46,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 03:27:46,365 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:46,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 432 transitions, 17713 flow. Second operand 22 states. [2020-10-16 03:27:46,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:46,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:46,366 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:47,886 INFO L129 PetriNetUnfolder]: 413/1133 cut-off events. [2020-10-16 03:27:47,886 INFO L130 PetriNetUnfolder]: For 295329/295335 co-relation queries the response was YES. [2020-10-16 03:27:47,911 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 03:27:47,925 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 114 selfloop transitions, 346 changer transitions 0/467 dead transitions. [2020-10-16 03:27:47,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 673 places, 467 transitions, 21764 flow [2020-10-16 03:27:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 03:27:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 03:27:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2293 transitions. [2020-10-16 03:27:47,927 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6744117647058824 [2020-10-16 03:27:47,927 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2293 transitions. [2020-10-16 03:27:47,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2293 transitions. [2020-10-16 03:27:47,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:47,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2293 transitions. [2020-10-16 03:27:47,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-16 03:27:47,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-16 03:27:47,930 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-16 03:27:47,930 INFO L185 Difference]: Start difference. First operand has 640 places, 432 transitions, 17713 flow. Second operand 34 states and 2293 transitions. [2020-10-16 03:27:47,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 673 places, 467 transitions, 21764 flow [2020-10-16 03:27:49,467 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 03:27:49,480 INFO L241 Difference]: Finished difference. Result has 648 places, 436 transitions, 18091 flow [2020-10-16 03:27:49,480 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 03:27:49,480 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 630 predicate places. [2020-10-16 03:27:49,481 INFO L481 AbstractCegarLoop]: Abstraction has has 648 places, 436 transitions, 18091 flow [2020-10-16 03:27:49,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 03:27:49,481 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:49,481 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:49,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:49,688 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:49,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1017528149, now seen corresponding path program 104 times [2020-10-16 03:27:49,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:49,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497717175] [2020-10-16 03:27:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:49,943 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 03:27:49,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497717175] [2020-10-16 03:27:49,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424356858] [2020-10-16 03:27:49,943 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 03:27:49,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:27:49,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:49,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:27:49,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:50,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:27:50,037 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 03:27:50,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:50,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 03:27:50,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310786748] [2020-10-16 03:27:50,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 03:27:50,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:50,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 03:27:50,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-16 03:27:50,039 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:50,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 436 transitions, 18091 flow. Second operand 23 states. [2020-10-16 03:27:50,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:50,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:50,040 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:51,838 INFO L129 PetriNetUnfolder]: 419/1151 cut-off events. [2020-10-16 03:27:51,838 INFO L130 PetriNetUnfolder]: For 299499/299505 co-relation queries the response was YES. [2020-10-16 03:27:51,859 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 03:27:51,873 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 106 selfloop transitions, 360 changer transitions 0/473 dead transitions. [2020-10-16 03:27:51,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 473 transitions, 22210 flow [2020-10-16 03:27:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 03:27:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 03:27:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2361 transitions. [2020-10-16 03:27:51,876 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745714285714286 [2020-10-16 03:27:51,876 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2361 transitions. [2020-10-16 03:27:51,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2361 transitions. [2020-10-16 03:27:51,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:51,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2361 transitions. [2020-10-16 03:27:51,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 03:27:51,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 03:27:51,879 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 03:27:51,879 INFO L185 Difference]: Start difference. First operand has 648 places, 436 transitions, 18091 flow. Second operand 35 states and 2361 transitions. [2020-10-16 03:27:51,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 473 transitions, 22210 flow [2020-10-16 03:27:53,405 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 03:27:53,418 INFO L241 Difference]: Finished difference. Result has 656 places, 442 transitions, 18570 flow [2020-10-16 03:27:53,419 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 03:27:53,419 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 638 predicate places. [2020-10-16 03:27:53,419 INFO L481 AbstractCegarLoop]: Abstraction has has 656 places, 442 transitions, 18570 flow [2020-10-16 03:27:53,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 03:27:53,419 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:53,419 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:53,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 03:27:53,620 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:53,620 INFO L82 PathProgramCache]: Analyzing trace with hash -885841341, now seen corresponding path program 105 times [2020-10-16 03:27:53,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:53,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441855628] [2020-10-16 03:27:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:53,862 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 03:27:53,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441855628] [2020-10-16 03:27:53,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625846741] [2020-10-16 03:27:53,862 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 03:27:53,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 03:27:53,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:53,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:27:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:53,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:27:53,959 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 03:27:53,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:53,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 03:27:53,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990229936] [2020-10-16 03:27:53,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 03:27:53,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:53,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 03:27:53,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 03:27:53,962 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:53,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 442 transitions, 18570 flow. Second operand 23 states. [2020-10-16 03:27:53,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:53,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:53,962 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:55,783 INFO L129 PetriNetUnfolder]: 421/1157 cut-off events. [2020-10-16 03:27:55,783 INFO L130 PetriNetUnfolder]: For 301550/301556 co-relation queries the response was YES. [2020-10-16 03:27:55,809 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 03:27:55,823 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 81 selfloop transitions, 390 changer transitions 0/478 dead transitions. [2020-10-16 03:27:55,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 478 transitions, 22768 flow [2020-10-16 03:27:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 03:27:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 03:27:55,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2497 transitions. [2020-10-16 03:27:55,825 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748648648648649 [2020-10-16 03:27:55,825 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2497 transitions. [2020-10-16 03:27:55,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2497 transitions. [2020-10-16 03:27:55,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:55,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2497 transitions. [2020-10-16 03:27:55,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 03:27:55,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 03:27:55,828 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 03:27:55,829 INFO L185 Difference]: Start difference. First operand has 656 places, 442 transitions, 18570 flow. Second operand 37 states and 2497 transitions. [2020-10-16 03:27:55,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 478 transitions, 22768 flow [2020-10-16 03:27:57,188 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 03:27:57,201 INFO L241 Difference]: Finished difference. Result has 665 places, 444 transitions, 18941 flow [2020-10-16 03:27:57,202 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 03:27:57,202 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 647 predicate places. [2020-10-16 03:27:57,202 INFO L481 AbstractCegarLoop]: Abstraction has has 665 places, 444 transitions, 18941 flow [2020-10-16 03:27:57,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 03:27:57,202 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:27:57,202 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:27:57,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:27:57,403 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:27:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:27:57,404 INFO L82 PathProgramCache]: Analyzing trace with hash -398268381, now seen corresponding path program 106 times [2020-10-16 03:27:57,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:27:57,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317405360] [2020-10-16 03:27:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:27:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:27:57,643 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 03:27:57,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317405360] [2020-10-16 03:27:57,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980225564] [2020-10-16 03:27:57,644 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 03:27:57,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:27:57,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:27:57,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:27:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:27:57,723 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 03:27:57,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:27:57,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 03:27:57,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000025674] [2020-10-16 03:27:57,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 03:27:57,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:27:57,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 03:27:57,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 03:27:57,726 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:27:57,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 665 places, 444 transitions, 18941 flow. Second operand 22 states. [2020-10-16 03:27:57,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:27:57,727 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:27:57,727 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:27:59,568 INFO L129 PetriNetUnfolder]: 430/1177 cut-off events. [2020-10-16 03:27:59,569 INFO L130 PetriNetUnfolder]: For 308805/308811 co-relation queries the response was YES. [2020-10-16 03:27:59,589 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 03:27:59,603 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 60 selfloop transitions, 422 changer transitions 0/489 dead transitions. [2020-10-16 03:27:59,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 489 transitions, 23973 flow [2020-10-16 03:27:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 03:27:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 03:27:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2702 transitions. [2020-10-16 03:27:59,606 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 03:27:59,606 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2702 transitions. [2020-10-16 03:27:59,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2702 transitions. [2020-10-16 03:27:59,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:27:59,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2702 transitions. [2020-10-16 03:27:59,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 03:27:59,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 03:27:59,610 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 03:27:59,610 INFO L185 Difference]: Start difference. First operand has 665 places, 444 transitions, 18941 flow. Second operand 40 states and 2702 transitions. [2020-10-16 03:27:59,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 489 transitions, 23973 flow [2020-10-16 03:28:01,044 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 03:28:01,058 INFO L241 Difference]: Finished difference. Result has 673 places, 451 transitions, 19544 flow [2020-10-16 03:28:01,058 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 03:28:01,058 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 655 predicate places. [2020-10-16 03:28:01,058 INFO L481 AbstractCegarLoop]: Abstraction has has 673 places, 451 transitions, 19544 flow [2020-10-16 03:28:01,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 03:28:01,058 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:01,059 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:01,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 03:28:01,259 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash -398251641, now seen corresponding path program 107 times [2020-10-16 03:28:01,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:01,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71669788] [2020-10-16 03:28:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:01,498 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 03:28:01,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71669788] [2020-10-16 03:28:01,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005492803] [2020-10-16 03:28:01,499 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 03:28:01,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 03:28:01,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:01,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:28:01,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:01,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:28:01,595 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 03:28:01,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:01,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 03:28:01,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361291053] [2020-10-16 03:28:01,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 03:28:01,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:01,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 03:28:01,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-16 03:28:01,598 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:01,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 451 transitions, 19544 flow. Second operand 23 states. [2020-10-16 03:28:01,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:01,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:01,599 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:03,583 INFO L129 PetriNetUnfolder]: 427/1172 cut-off events. [2020-10-16 03:28:03,583 INFO L130 PetriNetUnfolder]: For 327898/327900 co-relation queries the response was YES. [2020-10-16 03:28:03,610 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 03:28:03,624 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 58 selfloop transitions, 424 changer transitions 0/489 dead transitions. [2020-10-16 03:28:03,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 489 transitions, 24156 flow [2020-10-16 03:28:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 03:28:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 03:28:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2769 transitions. [2020-10-16 03:28:03,627 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753658536585366 [2020-10-16 03:28:03,627 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2769 transitions. [2020-10-16 03:28:03,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2769 transitions. [2020-10-16 03:28:03,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:03,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2769 transitions. [2020-10-16 03:28:03,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-16 03:28:03,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-16 03:28:03,630 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-16 03:28:03,630 INFO L185 Difference]: Start difference. First operand has 673 places, 451 transitions, 19544 flow. Second operand 41 states and 2769 transitions. [2020-10-16 03:28:03,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 489 transitions, 24156 flow [2020-10-16 03:28:05,265 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 03:28:05,280 INFO L241 Difference]: Finished difference. Result has 681 places, 452 transitions, 19446 flow [2020-10-16 03:28:05,280 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 03:28:05,280 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 663 predicate places. [2020-10-16 03:28:05,280 INFO L481 AbstractCegarLoop]: Abstraction has has 681 places, 452 transitions, 19446 flow [2020-10-16 03:28:05,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 03:28:05,280 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:05,281 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:05,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 03:28:05,481 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:05,482 INFO L82 PathProgramCache]: Analyzing trace with hash 635739649, now seen corresponding path program 108 times [2020-10-16 03:28:05,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:05,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459214597] [2020-10-16 03:28:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:05,722 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 03:28:05,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459214597] [2020-10-16 03:28:05,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103122732] [2020-10-16 03:28:05,723 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 03:28:05,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 03:28:05,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:05,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 03:28:05,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:05,805 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:28:05,826 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 03:28:05,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:05,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 03:28:05,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465491310] [2020-10-16 03:28:05,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 03:28:05,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:05,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 03:28:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-16 03:28:05,828 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:05,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 452 transitions, 19446 flow. Second operand 23 states. [2020-10-16 03:28:05,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:05,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:05,829 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:07,751 INFO L129 PetriNetUnfolder]: 430/1178 cut-off events. [2020-10-16 03:28:07,751 INFO L130 PetriNetUnfolder]: For 336950/336952 co-relation queries the response was YES. [2020-10-16 03:28:07,778 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 03:28:07,792 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 110 selfloop transitions, 374 changer transitions 0/491 dead transitions. [2020-10-16 03:28:07,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 491 transitions, 24180 flow [2020-10-16 03:28:07,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 03:28:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 03:28:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2701 transitions. [2020-10-16 03:28:07,795 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67525 [2020-10-16 03:28:07,795 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2701 transitions. [2020-10-16 03:28:07,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2701 transitions. [2020-10-16 03:28:07,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:07,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2701 transitions. [2020-10-16 03:28:07,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 03:28:07,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 03:28:07,800 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 03:28:07,800 INFO L185 Difference]: Start difference. First operand has 681 places, 452 transitions, 19446 flow. Second operand 40 states and 2701 transitions. [2020-10-16 03:28:07,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 491 transitions, 24180 flow [2020-10-16 03:28:09,550 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 03:28:09,564 INFO L241 Difference]: Finished difference. Result has 683 places, 455 transitions, 19687 flow [2020-10-16 03:28:09,565 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 03:28:09,565 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 665 predicate places. [2020-10-16 03:28:09,565 INFO L481 AbstractCegarLoop]: Abstraction has has 683 places, 455 transitions, 19687 flow [2020-10-16 03:28:09,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 03:28:09,565 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:09,565 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:09,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:28:09,766 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:09,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1257515262, now seen corresponding path program 109 times [2020-10-16 03:28:09,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:09,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266026032] [2020-10-16 03:28:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:10,021 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 03:28:10,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266026032] [2020-10-16 03:28:10,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182665239] [2020-10-16 03:28:10,022 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 03:28:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:10,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 03:28:10,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:10,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:28:10,130 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 03:28:10,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:10,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 03:28:10,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914911856] [2020-10-16 03:28:10,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 03:28:10,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:10,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 03:28:10,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-16 03:28:10,133 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:10,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 455 transitions, 19687 flow. Second operand 24 states. [2020-10-16 03:28:10,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:10,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:10,134 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:12,177 INFO L129 PetriNetUnfolder]: 433/1185 cut-off events. [2020-10-16 03:28:12,177 INFO L130 PetriNetUnfolder]: For 330581/330583 co-relation queries the response was YES. [2020-10-16 03:28:12,205 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 03:28:12,220 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 61 selfloop transitions, 428 changer transitions 0/496 dead transitions. [2020-10-16 03:28:12,220 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 496 transitions, 24577 flow [2020-10-16 03:28:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 03:28:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 03:28:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2701 transitions. [2020-10-16 03:28:12,222 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67525 [2020-10-16 03:28:12,222 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2701 transitions. [2020-10-16 03:28:12,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2701 transitions. [2020-10-16 03:28:12,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:12,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2701 transitions. [2020-10-16 03:28:12,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 03:28:12,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 03:28:12,226 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 03:28:12,226 INFO L185 Difference]: Start difference. First operand has 683 places, 455 transitions, 19687 flow. Second operand 40 states and 2701 transitions. [2020-10-16 03:28:12,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 496 transitions, 24577 flow [2020-10-16 03:28:13,830 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 03:28:13,844 INFO L241 Difference]: Finished difference. Result has 687 places, 458 transitions, 20009 flow [2020-10-16 03:28:13,845 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 03:28:13,845 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 669 predicate places. [2020-10-16 03:28:13,845 INFO L481 AbstractCegarLoop]: Abstraction has has 687 places, 458 transitions, 20009 flow [2020-10-16 03:28:13,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 03:28:13,845 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:13,845 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:14,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:28:14,046 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1592376589, now seen corresponding path program 110 times [2020-10-16 03:28:14,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:14,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469022057] [2020-10-16 03:28:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:14,373 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 03:28:14,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469022057] [2020-10-16 03:28:14,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797790010] [2020-10-16 03:28:14,374 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 03:28:14,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:28:14,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:14,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 03:28:14,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:14,436 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 03:28:14,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:14,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 03:28:14,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101311316] [2020-10-16 03:28:14,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 03:28:14,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:14,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 03:28:14,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-16 03:28:14,439 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:14,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 458 transitions, 20009 flow. Second operand 23 states. [2020-10-16 03:28:14,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:14,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:14,440 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:15,658 INFO L129 PetriNetUnfolder]: 435/1191 cut-off events. [2020-10-16 03:28:15,658 INFO L130 PetriNetUnfolder]: For 348056/348058 co-relation queries the response was YES. [2020-10-16 03:28:15,686 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 03:28:15,701 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 443 selfloop transitions, 31 changer transitions 0/481 dead transitions. [2020-10-16 03:28:15,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 481 transitions, 23219 flow [2020-10-16 03:28:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 03:28:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 03:28:15,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1612 transitions. [2020-10-16 03:28:15,702 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6716666666666666 [2020-10-16 03:28:15,702 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1612 transitions. [2020-10-16 03:28:15,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1612 transitions. [2020-10-16 03:28:15,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:15,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1612 transitions. [2020-10-16 03:28:15,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 03:28:15,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 03:28:15,705 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 03:28:15,705 INFO L185 Difference]: Start difference. First operand has 687 places, 458 transitions, 20009 flow. Second operand 24 states and 1612 transitions. [2020-10-16 03:28:15,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 481 transitions, 23219 flow [2020-10-16 03:28:17,569 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 03:28:17,582 INFO L241 Difference]: Finished difference. Result has 674 places, 460 transitions, 19248 flow [2020-10-16 03:28:17,583 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 03:28:17,583 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 656 predicate places. [2020-10-16 03:28:17,583 INFO L481 AbstractCegarLoop]: Abstraction has has 674 places, 460 transitions, 19248 flow [2020-10-16 03:28:17,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 03:28:17,583 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:17,583 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:17,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 03:28:17,784 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1160063869, now seen corresponding path program 111 times [2020-10-16 03:28:17,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:17,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227998432] [2020-10-16 03:28:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:18,124 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 03:28:18,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227998432] [2020-10-16 03:28:18,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500596142] [2020-10-16 03:28:18,125 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 03:28:18,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 03:28:18,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:18,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 03:28:18,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:18,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:28:18,219 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 03:28:18,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:18,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 03:28:18,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579240784] [2020-10-16 03:28:18,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 03:28:18,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:18,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 03:28:18,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 03:28:18,221 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:18,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 460 transitions, 19248 flow. Second operand 24 states. [2020-10-16 03:28:18,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:18,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:18,221 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:19,624 INFO L129 PetriNetUnfolder]: 443/1214 cut-off events. [2020-10-16 03:28:19,624 INFO L130 PetriNetUnfolder]: For 370083/370085 co-relation queries the response was YES. [2020-10-16 03:28:19,653 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 03:28:19,668 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 380 selfloop transitions, 104 changer transitions 0/491 dead transitions. [2020-10-16 03:28:19,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 491 transitions, 23189 flow [2020-10-16 03:28:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 03:28:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-16 03:28:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1816 transitions. [2020-10-16 03:28:19,670 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6725925925925926 [2020-10-16 03:28:19,670 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1816 transitions. [2020-10-16 03:28:19,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1816 transitions. [2020-10-16 03:28:19,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:19,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1816 transitions. [2020-10-16 03:28:19,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-16 03:28:19,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-16 03:28:19,673 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-16 03:28:19,673 INFO L185 Difference]: Start difference. First operand has 674 places, 460 transitions, 19248 flow. Second operand 27 states and 1816 transitions. [2020-10-16 03:28:19,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 491 transitions, 23189 flow [2020-10-16 03:28:21,548 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 03:28:21,562 INFO L241 Difference]: Finished difference. Result has 685 places, 468 transitions, 19975 flow [2020-10-16 03:28:21,563 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 03:28:21,563 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 667 predicate places. [2020-10-16 03:28:21,563 INFO L481 AbstractCegarLoop]: Abstraction has has 685 places, 468 transitions, 19975 flow [2020-10-16 03:28:21,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 03:28:21,563 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:21,563 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:21,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:28:21,764 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 112 times [2020-10-16 03:28:21,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:21,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400736424] [2020-10-16 03:28:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:22,030 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 03:28:22,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400736424] [2020-10-16 03:28:22,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603971333] [2020-10-16 03:28:22,031 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 03:28:22,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:28:22,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:22,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 03:28:22,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:22,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:28:22,125 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 03:28:22,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:22,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 03:28:22,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525210307] [2020-10-16 03:28:22,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 03:28:22,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:22,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 03:28:22,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 03:28:22,128 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:22,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 468 transitions, 19975 flow. Second operand 24 states. [2020-10-16 03:28:22,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:22,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:22,128 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:24,020 INFO L129 PetriNetUnfolder]: 445/1220 cut-off events. [2020-10-16 03:28:24,020 INFO L130 PetriNetUnfolder]: For 380446/380448 co-relation queries the response was YES. [2020-10-16 03:28:24,050 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 03:28:24,065 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 140 selfloop transitions, 356 changer transitions 0/503 dead transitions. [2020-10-16 03:28:24,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 503 transitions, 24509 flow [2020-10-16 03:28:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 03:28:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 03:28:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2496 transitions. [2020-10-16 03:28:24,067 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745945945945946 [2020-10-16 03:28:24,068 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2496 transitions. [2020-10-16 03:28:24,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2496 transitions. [2020-10-16 03:28:24,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:24,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2496 transitions. [2020-10-16 03:28:24,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 03:28:24,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 03:28:24,071 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 03:28:24,071 INFO L185 Difference]: Start difference. First operand has 685 places, 468 transitions, 19975 flow. Second operand 37 states and 2496 transitions. [2020-10-16 03:28:24,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 503 transitions, 24509 flow [2020-10-16 03:28:26,075 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 03:28:26,090 INFO L241 Difference]: Finished difference. Result has 703 places, 470 transitions, 20633 flow [2020-10-16 03:28:26,091 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 03:28:26,091 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 685 predicate places. [2020-10-16 03:28:26,091 INFO L481 AbstractCegarLoop]: Abstraction has has 703 places, 470 transitions, 20633 flow [2020-10-16 03:28:26,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 03:28:26,091 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:26,091 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:26,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-16 03:28:26,292 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1783484083, now seen corresponding path program 113 times [2020-10-16 03:28:26,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:26,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989844623] [2020-10-16 03:28:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:26,579 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 03:28:26,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989844623] [2020-10-16 03:28:26,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291586835] [2020-10-16 03:28:26,580 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 03:28:26,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 03:28:26,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:26,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 03:28:26,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:26,660 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 03:28:26,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:26,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 03:28:26,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569768250] [2020-10-16 03:28:26,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 03:28:26,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:26,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 03:28:26,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 03:28:26,662 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:26,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 470 transitions, 20633 flow. Second operand 23 states. [2020-10-16 03:28:26,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:26,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:26,662 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:28,421 INFO L129 PetriNetUnfolder]: 449/1231 cut-off events. [2020-10-16 03:28:28,421 INFO L130 PetriNetUnfolder]: For 382758/382760 co-relation queries the response was YES. [2020-10-16 03:28:28,451 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 03:28:28,467 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 100 selfloop transitions, 404 changer transitions 0/511 dead transitions. [2020-10-16 03:28:28,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 511 transitions, 25649 flow [2020-10-16 03:28:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 03:28:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 03:28:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2835 transitions. [2020-10-16 03:28:28,469 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:28:28,469 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2835 transitions. [2020-10-16 03:28:28,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2835 transitions. [2020-10-16 03:28:28,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:28,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2835 transitions. [2020-10-16 03:28:28,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-16 03:28:28,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-16 03:28:28,473 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-16 03:28:28,473 INFO L185 Difference]: Start difference. First operand has 703 places, 470 transitions, 20633 flow. Second operand 42 states and 2835 transitions. [2020-10-16 03:28:28,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 511 transitions, 25649 flow [2020-10-16 03:28:30,172 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 03:28:30,187 INFO L241 Difference]: Finished difference. Result has 713 places, 474 transitions, 20945 flow [2020-10-16 03:28:30,188 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 03:28:30,188 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 695 predicate places. [2020-10-16 03:28:30,188 INFO L481 AbstractCegarLoop]: Abstraction has has 713 places, 474 transitions, 20945 flow [2020-10-16 03:28:30,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 03:28:30,188 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:30,188 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:30,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 03:28:30,395 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:30,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:30,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1766890093, now seen corresponding path program 114 times [2020-10-16 03:28:30,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:30,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491834946] [2020-10-16 03:28:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:30,652 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 03:28:30,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491834946] [2020-10-16 03:28:30,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121250789] [2020-10-16 03:28:30,653 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 03:28:30,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 03:28:30,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:30,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 03:28:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:30,764 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 03:28:30,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:30,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 03:28:30,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419710398] [2020-10-16 03:28:30,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 03:28:30,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:30,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 03:28:30,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 03:28:30,766 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:30,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 474 transitions, 20945 flow. Second operand 24 states. [2020-10-16 03:28:30,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:30,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:30,767 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:32,865 INFO L129 PetriNetUnfolder]: 453/1241 cut-off events. [2020-10-16 03:28:32,865 INFO L130 PetriNetUnfolder]: For 386389/386395 co-relation queries the response was YES. [2020-10-16 03:28:32,895 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 03:28:32,911 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 90 selfloop transitions, 420 changer transitions 0/517 dead transitions. [2020-10-16 03:28:32,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 517 transitions, 26281 flow [2020-10-16 03:28:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 03:28:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 03:28:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2904 transitions. [2020-10-16 03:28:32,914 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753488372093023 [2020-10-16 03:28:32,914 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2904 transitions. [2020-10-16 03:28:32,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2904 transitions. [2020-10-16 03:28:32,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:32,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2904 transitions. [2020-10-16 03:28:32,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 44 states. [2020-10-16 03:28:32,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 44 states. [2020-10-16 03:28:32,918 INFO L81 ComplementDD]: Finished complementDD. Result 44 states. [2020-10-16 03:28:32,918 INFO L185 Difference]: Start difference. First operand has 713 places, 474 transitions, 20945 flow. Second operand 43 states and 2904 transitions. [2020-10-16 03:28:32,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 517 transitions, 26281 flow [2020-10-16 03:28:34,903 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 03:28:34,919 INFO L241 Difference]: Finished difference. Result has 719 places, 478 transitions, 21348 flow [2020-10-16 03:28:34,919 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 03:28:34,919 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 701 predicate places. [2020-10-16 03:28:34,919 INFO L481 AbstractCegarLoop]: Abstraction has has 719 places, 478 transitions, 21348 flow [2020-10-16 03:28:34,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 03:28:34,919 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:34,919 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:35,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-16 03:28:35,120 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:35,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:35,121 INFO L82 PathProgramCache]: Analyzing trace with hash 852224602, now seen corresponding path program 115 times [2020-10-16 03:28:35,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:35,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676342260] [2020-10-16 03:28:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:35,504 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 03:28:35,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676342260] [2020-10-16 03:28:35,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826095584] [2020-10-16 03:28:35,505 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 03:28:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:35,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 03:28:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:35,591 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 03:28:35,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:35,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 03:28:35,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430035387] [2020-10-16 03:28:35,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 03:28:35,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:35,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 03:28:35,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-16 03:28:35,594 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:35,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 478 transitions, 21348 flow. Second operand 24 states. [2020-10-16 03:28:35,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:35,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:35,595 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:37,349 INFO L129 PetriNetUnfolder]: 455/1247 cut-off events. [2020-10-16 03:28:37,349 INFO L130 PetriNetUnfolder]: For 396662/396668 co-relation queries the response was YES. [2020-10-16 03:28:37,380 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 03:28:37,396 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 422 selfloop transitions, 74 changer transitions 0/503 dead transitions. [2020-10-16 03:28:37,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 503 transitions, 24884 flow [2020-10-16 03:28:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 03:28:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 03:28:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1747 transitions. [2020-10-16 03:28:37,398 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.671923076923077 [2020-10-16 03:28:37,398 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1747 transitions. [2020-10-16 03:28:37,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1747 transitions. [2020-10-16 03:28:37,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:37,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1747 transitions. [2020-10-16 03:28:37,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 03:28:37,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 03:28:37,400 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 03:28:37,401 INFO L185 Difference]: Start difference. First operand has 719 places, 478 transitions, 21348 flow. Second operand 26 states and 1747 transitions. [2020-10-16 03:28:37,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 503 transitions, 24884 flow [2020-10-16 03:28:39,348 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 03:28:39,363 INFO L241 Difference]: Finished difference. Result has 707 places, 480 transitions, 20667 flow [2020-10-16 03:28:39,363 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 03:28:39,363 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 689 predicate places. [2020-10-16 03:28:39,363 INFO L481 AbstractCegarLoop]: Abstraction has has 707 places, 480 transitions, 20667 flow [2020-10-16 03:28:39,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 03:28:39,363 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:39,364 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:39,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:28:39,564 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash 139611352, now seen corresponding path program 116 times [2020-10-16 03:28:39,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:39,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774645804] [2020-10-16 03:28:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:39,926 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 03:28:39,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774645804] [2020-10-16 03:28:39,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781239902] [2020-10-16 03:28:39,927 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 03:28:39,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:28:39,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:39,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 03:28:39,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:40,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:28:40,027 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 03:28:40,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:40,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 03:28:40,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249165420] [2020-10-16 03:28:40,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 03:28:40,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:40,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 03:28:40,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-16 03:28:40,029 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:40,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 480 transitions, 20667 flow. Second operand 25 states. [2020-10-16 03:28:40,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:40,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:40,031 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:41,567 INFO L129 PetriNetUnfolder]: 457/1254 cut-off events. [2020-10-16 03:28:41,567 INFO L130 PetriNetUnfolder]: For 406857/406859 co-relation queries the response was YES. [2020-10-16 03:28:41,598 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 03:28:41,614 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 314 selfloop transitions, 186 changer transitions 0/507 dead transitions. [2020-10-16 03:28:41,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 507 transitions, 24443 flow [2020-10-16 03:28:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 03:28:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-16 03:28:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1951 transitions. [2020-10-16 03:28:41,616 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6727586206896552 [2020-10-16 03:28:41,616 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1951 transitions. [2020-10-16 03:28:41,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1951 transitions. [2020-10-16 03:28:41,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:41,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1951 transitions. [2020-10-16 03:28:41,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-16 03:28:41,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-16 03:28:41,619 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-16 03:28:41,619 INFO L185 Difference]: Start difference. First operand has 707 places, 480 transitions, 20667 flow. Second operand 29 states and 1951 transitions. [2020-10-16 03:28:41,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 507 transitions, 24443 flow [2020-10-16 03:28:43,451 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 03:28:43,466 INFO L241 Difference]: Finished difference. Result has 714 places, 482 transitions, 20961 flow [2020-10-16 03:28:43,466 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 03:28:43,466 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 696 predicate places. [2020-10-16 03:28:43,467 INFO L481 AbstractCegarLoop]: Abstraction has has 714 places, 482 transitions, 20961 flow [2020-10-16 03:28:43,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 03:28:43,467 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:43,467 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:43,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-16 03:28:43,668 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1846850238, now seen corresponding path program 117 times [2020-10-16 03:28:43,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:43,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653427974] [2020-10-16 03:28:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:43,994 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 03:28:43,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653427974] [2020-10-16 03:28:43,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345408300] [2020-10-16 03:28:43,995 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 03:28:44,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 03:28:44,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:44,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 03:28:44,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:44,071 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 03:28:44,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:44,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 03:28:44,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173886218] [2020-10-16 03:28:44,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 03:28:44,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:44,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 03:28:44,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 03:28:44,074 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:44,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 714 places, 482 transitions, 20961 flow. Second operand 24 states. [2020-10-16 03:28:44,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:44,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:44,074 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:45,721 INFO L129 PetriNetUnfolder]: 461/1266 cut-off events. [2020-10-16 03:28:45,721 INFO L130 PetriNetUnfolder]: For 411715/411721 co-relation queries the response was YES. [2020-10-16 03:28:45,751 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 03:28:45,768 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 226 selfloop transitions, 282 changer transitions 0/515 dead transitions. [2020-10-16 03:28:45,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 515 transitions, 25231 flow [2020-10-16 03:28:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 03:28:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 03:28:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2155 transitions. [2020-10-16 03:28:45,770 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734375 [2020-10-16 03:28:45,770 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2155 transitions. [2020-10-16 03:28:45,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2155 transitions. [2020-10-16 03:28:45,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:45,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2155 transitions. [2020-10-16 03:28:45,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 03:28:45,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 03:28:45,773 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 03:28:45,773 INFO L185 Difference]: Start difference. First operand has 714 places, 482 transitions, 20961 flow. Second operand 32 states and 2155 transitions. [2020-10-16 03:28:45,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 515 transitions, 25231 flow [2020-10-16 03:28:47,860 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 03:28:47,875 INFO L241 Difference]: Finished difference. Result has 721 places, 486 transitions, 21315 flow [2020-10-16 03:28:47,875 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 03:28:47,876 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 703 predicate places. [2020-10-16 03:28:47,876 INFO L481 AbstractCegarLoop]: Abstraction has has 721 places, 486 transitions, 21315 flow [2020-10-16 03:28:47,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 03:28:47,876 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:47,876 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:48,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:28:48,077 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:48,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1629312894, now seen corresponding path program 118 times [2020-10-16 03:28:48,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:48,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221830617] [2020-10-16 03:28:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:48,394 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 03:28:48,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221830617] [2020-10-16 03:28:48,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725707046] [2020-10-16 03:28:48,395 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 03:28:48,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:28:48,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:48,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 03:28:48,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:48,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:28:48,494 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 03:28:48,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:48,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 03:28:48,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560012467] [2020-10-16 03:28:48,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 03:28:48,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:48,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 03:28:48,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-16 03:28:48,497 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:48,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 486 transitions, 21315 flow. Second operand 25 states. [2020-10-16 03:28:48,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:48,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:48,498 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:50,426 INFO L129 PetriNetUnfolder]: 465/1278 cut-off events. [2020-10-16 03:28:50,427 INFO L130 PetriNetUnfolder]: For 414859/414865 co-relation queries the response was YES. [2020-10-16 03:28:50,459 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 03:28:50,476 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 174 selfloop transitions, 340 changer transitions 0/521 dead transitions. [2020-10-16 03:28:50,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 521 transitions, 25807 flow [2020-10-16 03:28:50,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 03:28:50,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 03:28:50,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2359 transitions. [2020-10-16 03:28:50,478 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 03:28:50,478 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2359 transitions. [2020-10-16 03:28:50,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2359 transitions. [2020-10-16 03:28:50,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:50,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2359 transitions. [2020-10-16 03:28:50,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 03:28:50,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 03:28:50,481 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 03:28:50,481 INFO L185 Difference]: Start difference. First operand has 721 places, 486 transitions, 21315 flow. Second operand 35 states and 2359 transitions. [2020-10-16 03:28:50,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 521 transitions, 25807 flow [2020-10-16 03:28:52,554 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 03:28:52,569 INFO L241 Difference]: Finished difference. Result has 729 places, 490 transitions, 21633 flow [2020-10-16 03:28:52,570 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 03:28:52,570 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 711 predicate places. [2020-10-16 03:28:52,570 INFO L481 AbstractCegarLoop]: Abstraction has has 729 places, 490 transitions, 21633 flow [2020-10-16 03:28:52,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 03:28:52,570 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:52,570 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:52,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:28:52,771 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash 12153852, now seen corresponding path program 119 times [2020-10-16 03:28:52,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:52,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949220448] [2020-10-16 03:28:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:53,077 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 03:28:53,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949220448] [2020-10-16 03:28:53,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276621741] [2020-10-16 03:28:53,078 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 03:28:53,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 03:28:53,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:53,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 03:28:53,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:53,153 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 03:28:53,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:53,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 03:28:53,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300079263] [2020-10-16 03:28:53,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 03:28:53,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:53,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 03:28:53,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 03:28:53,155 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:53,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 490 transitions, 21633 flow. Second operand 24 states. [2020-10-16 03:28:53,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:53,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:53,156 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:54,997 INFO L129 PetriNetUnfolder]: 469/1290 cut-off events. [2020-10-16 03:28:54,997 INFO L130 PetriNetUnfolder]: For 417998/418000 co-relation queries the response was YES. [2020-10-16 03:28:55,027 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 03:28:55,044 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 148 selfloop transitions, 372 changer transitions 0/527 dead transitions. [2020-10-16 03:28:55,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 527 transitions, 26347 flow [2020-10-16 03:28:55,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 03:28:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 03:28:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2427 transitions. [2020-10-16 03:28:55,046 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741666666666667 [2020-10-16 03:28:55,046 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2427 transitions. [2020-10-16 03:28:55,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2427 transitions. [2020-10-16 03:28:55,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:55,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2427 transitions. [2020-10-16 03:28:55,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 03:28:55,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 03:28:55,049 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 03:28:55,049 INFO L185 Difference]: Start difference. First operand has 729 places, 490 transitions, 21633 flow. Second operand 36 states and 2427 transitions. [2020-10-16 03:28:55,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 527 transitions, 26347 flow [2020-10-16 03:28:57,032 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 03:28:57,047 INFO L241 Difference]: Finished difference. Result has 736 places, 494 transitions, 21945 flow [2020-10-16 03:28:57,048 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 03:28:57,048 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 718 predicate places. [2020-10-16 03:28:57,048 INFO L481 AbstractCegarLoop]: Abstraction has has 736 places, 494 transitions, 21945 flow [2020-10-16 03:28:57,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 03:28:57,048 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:28:57,048 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:28:57,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:28:57,249 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:28:57,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:28:57,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1269043552, now seen corresponding path program 120 times [2020-10-16 03:28:57,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:28:57,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247656272] [2020-10-16 03:28:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:28:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:28:57,548 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 03:28:57,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247656272] [2020-10-16 03:28:57,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72885172] [2020-10-16 03:28:57,549 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 03:28:57,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 03:28:57,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:28:57,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 03:28:57,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:28:57,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:28:57,648 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 03:28:57,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:28:57,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 03:28:57,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148549638] [2020-10-16 03:28:57,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 03:28:57,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:28:57,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 03:28:57,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-16 03:28:57,651 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:28:57,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 494 transitions, 21945 flow. Second operand 25 states. [2020-10-16 03:28:57,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:28:57,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:28:57,651 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:28:59,701 INFO L129 PetriNetUnfolder]: 473/1302 cut-off events. [2020-10-16 03:28:59,701 INFO L130 PetriNetUnfolder]: For 421292/421298 co-relation queries the response was YES. [2020-10-16 03:28:59,734 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 03:28:59,751 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 134 selfloop transitions, 390 changer transitions 0/531 dead transitions. [2020-10-16 03:28:59,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 772 places, 531 transitions, 26667 flow [2020-10-16 03:28:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 03:28:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 03:28:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2495 transitions. [2020-10-16 03:28:59,753 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743243243243243 [2020-10-16 03:28:59,753 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2495 transitions. [2020-10-16 03:28:59,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2495 transitions. [2020-10-16 03:28:59,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:28:59,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2495 transitions. [2020-10-16 03:28:59,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 03:28:59,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 03:28:59,756 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 03:28:59,757 INFO L185 Difference]: Start difference. First operand has 736 places, 494 transitions, 21945 flow. Second operand 37 states and 2495 transitions. [2020-10-16 03:28:59,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 772 places, 531 transitions, 26667 flow [2020-10-16 03:29:01,805 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 03:29:01,821 INFO L241 Difference]: Finished difference. Result has 737 places, 498 transitions, 22058 flow [2020-10-16 03:29:01,821 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 03:29:01,821 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 719 predicate places. [2020-10-16 03:29:01,821 INFO L481 AbstractCegarLoop]: Abstraction has has 737 places, 498 transitions, 22058 flow [2020-10-16 03:29:01,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 03:29:01,822 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:29:01,822 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:29:02,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:29:02,022 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:29:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:29:02,023 INFO L82 PathProgramCache]: Analyzing trace with hash -751023476, now seen corresponding path program 121 times [2020-10-16 03:29:02,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:29:02,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013109748] [2020-10-16 03:29:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:29:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:02,319 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 03:29:02,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013109748] [2020-10-16 03:29:02,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606496787] [2020-10-16 03:29:02,320 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 03:29:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 03:29:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:29:02,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:29:02,417 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 03:29:02,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:29:02,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 03:29:02,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217309604] [2020-10-16 03:29:02,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 03:29:02,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:29:02,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 03:29:02,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-16 03:29:02,419 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:29:02,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 498 transitions, 22058 flow. Second operand 25 states. [2020-10-16 03:29:02,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:29:02,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:29:02,419 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:29:04,676 INFO L129 PetriNetUnfolder]: 475/1308 cut-off events. [2020-10-16 03:29:04,676 INFO L130 PetriNetUnfolder]: For 423039/423041 co-relation queries the response was YES. [2020-10-16 03:29:04,708 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 03:29:04,726 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 102 selfloop transitions, 426 changer transitions 0/535 dead transitions. [2020-10-16 03:29:04,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 535 transitions, 26920 flow [2020-10-16 03:29:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 03:29:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 03:29:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2631 transitions. [2020-10-16 03:29:04,728 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6746153846153846 [2020-10-16 03:29:04,728 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2631 transitions. [2020-10-16 03:29:04,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2631 transitions. [2020-10-16 03:29:04,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:29:04,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2631 transitions. [2020-10-16 03:29:04,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-16 03:29:04,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-16 03:29:04,731 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-16 03:29:04,731 INFO L185 Difference]: Start difference. First operand has 737 places, 498 transitions, 22058 flow. Second operand 39 states and 2631 transitions. [2020-10-16 03:29:04,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 775 places, 535 transitions, 26920 flow [2020-10-16 03:29:06,750 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 03:29:06,766 INFO L241 Difference]: Finished difference. Result has 744 places, 500 transitions, 22289 flow [2020-10-16 03:29:06,767 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 03:29:06,767 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 726 predicate places. [2020-10-16 03:29:06,767 INFO L481 AbstractCegarLoop]: Abstraction has has 744 places, 500 transitions, 22289 flow [2020-10-16 03:29:06,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 03:29:06,767 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:29:06,767 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:29:06,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 03:29:06,968 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:29:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:29:06,968 INFO L82 PathProgramCache]: Analyzing trace with hash -344844180, now seen corresponding path program 122 times [2020-10-16 03:29:06,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:29:06,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145351734] [2020-10-16 03:29:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:29:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:07,243 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 03:29:07,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145351734] [2020-10-16 03:29:07,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130514515] [2020-10-16 03:29:07,244 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 03:29:07,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:29:07,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:29:07,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 03:29:07,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:29:07,319 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 03:29:07,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:29:07,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 03:29:07,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170486178] [2020-10-16 03:29:07,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 03:29:07,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:29:07,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 03:29:07,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-16 03:29:07,322 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:29:07,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 500 transitions, 22289 flow. Second operand 24 states. [2020-10-16 03:29:07,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:29:07,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:29:07,322 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:29:09,397 INFO L129 PetriNetUnfolder]: 477/1313 cut-off events. [2020-10-16 03:29:09,398 INFO L130 PetriNetUnfolder]: For 424282/424284 co-relation queries the response was YES. [2020-10-16 03:29:09,432 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 03:29:09,449 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 72 selfloop transitions, 462 changer transitions 0/541 dead transitions. [2020-10-16 03:29:09,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 541 transitions, 27575 flow [2020-10-16 03:29:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 03:29:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 03:29:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2835 transitions. [2020-10-16 03:29:09,451 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:29:09,451 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2835 transitions. [2020-10-16 03:29:09,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2835 transitions. [2020-10-16 03:29:09,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:29:09,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2835 transitions. [2020-10-16 03:29:09,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-16 03:29:09,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-16 03:29:09,455 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-16 03:29:09,455 INFO L185 Difference]: Start difference. First operand has 744 places, 500 transitions, 22289 flow. Second operand 42 states and 2835 transitions. [2020-10-16 03:29:09,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 541 transitions, 27575 flow [2020-10-16 03:29:11,682 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 03:29:11,698 INFO L241 Difference]: Finished difference. Result has 751 places, 502 transitions, 22535 flow [2020-10-16 03:29:11,698 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 03:29:11,699 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 733 predicate places. [2020-10-16 03:29:11,699 INFO L481 AbstractCegarLoop]: Abstraction has has 751 places, 502 transitions, 22535 flow [2020-10-16 03:29:11,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 03:29:11,699 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:29:11,699 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:29:11,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-16 03:29:11,900 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:29:11,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:29:11,900 INFO L82 PathProgramCache]: Analyzing trace with hash -328250190, now seen corresponding path program 123 times [2020-10-16 03:29:11,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:29:11,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380722717] [2020-10-16 03:29:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:29:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:12,181 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 03:29:12,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380722717] [2020-10-16 03:29:12,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413415016] [2020-10-16 03:29:12,182 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 03:29:12,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 03:29:12,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:29:12,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:29:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:29:12,291 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 03:29:12,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:29:12,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 03:29:12,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040655802] [2020-10-16 03:29:12,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 03:29:12,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:29:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 03:29:12,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-16 03:29:12,295 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:29:12,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 502 transitions, 22535 flow. Second operand 25 states. [2020-10-16 03:29:12,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:29:12,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:29:12,295 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:29:14,747 INFO L129 PetriNetUnfolder]: 481/1324 cut-off events. [2020-10-16 03:29:14,747 INFO L130 PetriNetUnfolder]: For 428496/428498 co-relation queries the response was YES. [2020-10-16 03:29:14,774 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 03:29:14,792 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 64 selfloop transitions, 476 changer transitions 0/547 dead transitions. [2020-10-16 03:29:14,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 547 transitions, 28213 flow [2020-10-16 03:29:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 03:29:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 03:29:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2904 transitions. [2020-10-16 03:29:14,795 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753488372093023 [2020-10-16 03:29:14,795 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2904 transitions. [2020-10-16 03:29:14,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2904 transitions. [2020-10-16 03:29:14,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:29:14,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2904 transitions. [2020-10-16 03:29:14,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 44 states. [2020-10-16 03:29:14,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 44 states. [2020-10-16 03:29:14,801 INFO L81 ComplementDD]: Finished complementDD. Result 44 states. [2020-10-16 03:29:14,801 INFO L185 Difference]: Start difference. First operand has 751 places, 502 transitions, 22535 flow. Second operand 43 states and 2904 transitions. [2020-10-16 03:29:14,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 547 transitions, 28213 flow [2020-10-16 03:29:17,050 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 03:29:17,066 INFO L241 Difference]: Finished difference. Result has 754 places, 506 transitions, 22903 flow [2020-10-16 03:29:17,067 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 03:29:17,067 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 736 predicate places. [2020-10-16 03:29:17,067 INFO L481 AbstractCegarLoop]: Abstraction has has 754 places, 506 transitions, 22903 flow [2020-10-16 03:29:17,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 03:29:17,067 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:29:17,067 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:29:17,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 03:29:17,268 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:29:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:29:17,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1060998272, now seen corresponding path program 124 times [2020-10-16 03:29:17,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:29:17,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829829799] [2020-10-16 03:29:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:29:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:17,553 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 03:29:17,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829829799] [2020-10-16 03:29:17,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393376090] [2020-10-16 03:29:17,554 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 03:29:17,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:29:17,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:29:17,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 03:29:17,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:29:17,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:29:17,660 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 03:29:17,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:29:17,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 03:29:17,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282389054] [2020-10-16 03:29:17,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 03:29:17,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:29:17,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 03:29:17,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-16 03:29:17,663 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:29:17,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 506 transitions, 22903 flow. Second operand 25 states. [2020-10-16 03:29:17,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:29:17,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:29:17,663 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:29:20,082 INFO L129 PetriNetUnfolder]: 484/1328 cut-off events. [2020-10-16 03:29:20,082 INFO L130 PetriNetUnfolder]: For 438540/438546 co-relation queries the response was YES. [2020-10-16 03:29:20,117 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 03:29:20,135 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 108 selfloop transitions, 434 changer transitions 0/549 dead transitions. [2020-10-16 03:29:20,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 797 places, 549 transitions, 28441 flow [2020-10-16 03:29:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 03:29:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 03:29:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2971 transitions. [2020-10-16 03:29:20,138 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752272727272727 [2020-10-16 03:29:20,138 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2971 transitions. [2020-10-16 03:29:20,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2971 transitions. [2020-10-16 03:29:20,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:29:20,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2971 transitions. [2020-10-16 03:29:20,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-16 03:29:20,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-16 03:29:20,141 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-16 03:29:20,141 INFO L185 Difference]: Start difference. First operand has 754 places, 506 transitions, 22903 flow. Second operand 44 states and 2971 transitions. [2020-10-16 03:29:20,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 797 places, 549 transitions, 28441 flow [2020-10-16 03:29:22,362 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 03:29:22,379 INFO L241 Difference]: Finished difference. Result has 760 places, 509 transitions, 22984 flow [2020-10-16 03:29:22,379 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 03:29:22,379 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 742 predicate places. [2020-10-16 03:29:22,380 INFO L481 AbstractCegarLoop]: Abstraction has has 760 places, 509 transitions, 22984 flow [2020-10-16 03:29:22,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 03:29:22,380 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:29:22,380 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:29:22,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 03:29:22,581 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:29:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:29:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1598742837, now seen corresponding path program 125 times [2020-10-16 03:29:22,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:29:22,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068864471] [2020-10-16 03:29:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:29:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:22,897 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 03:29:22,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068864471] [2020-10-16 03:29:22,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676811004] [2020-10-16 03:29:22,898 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 03:29:22,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 03:29:22,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:29:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:29:22,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:29:22,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:29:23,018 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 03:29:23,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:29:23,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 03:29:23,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985325042] [2020-10-16 03:29:23,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:29:23,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:29:23,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:29:23,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:29:23,021 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:29:23,022 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 509 transitions, 22984 flow. Second operand 26 states. [2020-10-16 03:29:23,022 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:29:23,022 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:29:23,022 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:29:25,666 INFO L129 PetriNetUnfolder]: 487/1336 cut-off events. [2020-10-16 03:29:25,666 INFO L130 PetriNetUnfolder]: For 448934/448940 co-relation queries the response was YES. [2020-10-16 03:29:25,694 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 03:29:25,712 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 65 selfloop transitions, 482 changer transitions 0/554 dead transitions. [2020-10-16 03:29:25,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 554 transitions, 28778 flow [2020-10-16 03:29:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 03:29:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 03:29:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2971 transitions. [2020-10-16 03:29:25,715 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752272727272727 [2020-10-16 03:29:25,715 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2971 transitions. [2020-10-16 03:29:25,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2971 transitions. [2020-10-16 03:29:25,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:29:25,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2971 transitions. [2020-10-16 03:29:25,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-16 03:29:25,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-16 03:29:25,719 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-16 03:29:25,719 INFO L185 Difference]: Start difference. First operand has 760 places, 509 transitions, 22984 flow. Second operand 44 states and 2971 transitions. [2020-10-16 03:29:25,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 554 transitions, 28778 flow [2020-10-16 03:29:27,868 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 03:29:27,885 INFO L241 Difference]: Finished difference. Result has 764 places, 512 transitions, 23280 flow [2020-10-16 03:29:27,886 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 03:29:27,886 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 746 predicate places. [2020-10-16 03:29:27,886 INFO L481 AbstractCegarLoop]: Abstraction has has 764 places, 512 transitions, 23280 flow [2020-10-16 03:29:27,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:29:27,886 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:29:27,886 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:29:28,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:29:28,094 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:29:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:29:28,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1451854926, now seen corresponding path program 126 times [2020-10-16 03:29:28,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:29:28,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205474565] [2020-10-16 03:29:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:29:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:28,507 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 03:29:28,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205474565] [2020-10-16 03:29:28,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327964042] [2020-10-16 03:29:28,508 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 03:29:28,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 03:29:28,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:29:28,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:29:28,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:29:28,577 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 03:29:28,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:29:28,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 03:29:28,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647844252] [2020-10-16 03:29:28,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 03:29:28,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:29:28,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 03:29:28,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-10-16 03:29:28,581 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:29:28,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 512 transitions, 23280 flow. Second operand 25 states. [2020-10-16 03:29:28,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:29:28,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:29:28,582 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:29:30,145 INFO L129 PetriNetUnfolder]: 489/1343 cut-off events. [2020-10-16 03:29:30,145 INFO L130 PetriNetUnfolder]: For 461438/461444 co-relation queries the response was YES. [2020-10-16 03:29:30,182 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 03:29:30,199 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 497 selfloop transitions, 33 changer transitions 0/537 dead transitions. [2020-10-16 03:29:30,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 789 places, 537 transitions, 26998 flow [2020-10-16 03:29:30,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 03:29:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 03:29:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1746 transitions. [2020-10-16 03:29:30,202 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6715384615384615 [2020-10-16 03:29:30,202 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1746 transitions. [2020-10-16 03:29:30,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1746 transitions. [2020-10-16 03:29:30,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:29:30,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1746 transitions. [2020-10-16 03:29:30,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 03:29:30,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 03:29:30,205 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 03:29:30,205 INFO L185 Difference]: Start difference. First operand has 764 places, 512 transitions, 23280 flow. Second operand 26 states and 1746 transitions. [2020-10-16 03:29:30,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 789 places, 537 transitions, 26998 flow [2020-10-16 03:29:32,695 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 03:29:32,711 INFO L241 Difference]: Finished difference. Result has 750 places, 514 transitions, 22436 flow [2020-10-16 03:29:32,711 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 03:29:32,711 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 732 predicate places. [2020-10-16 03:29:32,712 INFO L481 AbstractCegarLoop]: Abstraction has has 750 places, 514 transitions, 22436 flow [2020-10-16 03:29:32,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 03:29:32,712 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:29:32,712 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:29:32,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-16 03:29:32,919 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:29:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:29:32,920 INFO L82 PathProgramCache]: Analyzing trace with hash -861948444, now seen corresponding path program 127 times [2020-10-16 03:29:32,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:29:32,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812052963] [2020-10-16 03:29:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:29:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:33,310 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 03:29:33,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812052963] [2020-10-16 03:29:33,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553486954] [2020-10-16 03:29:33,310 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 03:29:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:33,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:29:33,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:29:33,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:29:33,407 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 03:29:33,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:29:33,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 03:29:33,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193700943] [2020-10-16 03:29:33,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:29:33,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:29:33,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:29:33,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:29:33,410 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:29:33,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 514 transitions, 22436 flow. Second operand 26 states. [2020-10-16 03:29:33,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:29:33,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:29:33,411 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:29:35,237 INFO L129 PetriNetUnfolder]: 495/1361 cut-off events. [2020-10-16 03:29:35,237 INFO L130 PetriNetUnfolder]: For 485555/485557 co-relation queries the response was YES. [2020-10-16 03:29:35,273 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 03:29:35,291 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 358 selfloop transitions, 182 changer transitions 0/547 dead transitions. [2020-10-16 03:29:35,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 547 transitions, 26896 flow [2020-10-16 03:29:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 03:29:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 03:29:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2086 transitions. [2020-10-16 03:29:35,294 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6729032258064516 [2020-10-16 03:29:35,294 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2086 transitions. [2020-10-16 03:29:35,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2086 transitions. [2020-10-16 03:29:35,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:29:35,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2086 transitions. [2020-10-16 03:29:35,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 03:29:35,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 03:29:35,296 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 03:29:35,296 INFO L185 Difference]: Start difference. First operand has 750 places, 514 transitions, 22436 flow. Second operand 31 states and 2086 transitions. [2020-10-16 03:29:35,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 547 transitions, 26896 flow [2020-10-16 03:29:37,813 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 03:29:37,830 INFO L241 Difference]: Finished difference. Result has 763 places, 520 transitions, 23109 flow [2020-10-16 03:29:37,830 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 03:29:37,831 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 745 predicate places. [2020-10-16 03:29:37,831 INFO L481 AbstractCegarLoop]: Abstraction has has 763 places, 520 transitions, 23109 flow [2020-10-16 03:29:37,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:29:37,831 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:29:37,831 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:29:38,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 03:29:38,032 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:29:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:29:38,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1372957636, now seen corresponding path program 128 times [2020-10-16 03:29:38,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:29:38,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81446351] [2020-10-16 03:29:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:29:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:38,386 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 03:29:38,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81446351] [2020-10-16 03:29:38,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82871022] [2020-10-16 03:29:38,387 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 03:29:38,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:29:38,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:29:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:29:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:29:38,455 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 03:29:38,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:29:38,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 03:29:38,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453390702] [2020-10-16 03:29:38,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 03:29:38,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:29:38,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 03:29:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-16 03:29:38,458 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:29:38,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 520 transitions, 23109 flow. Second operand 25 states. [2020-10-16 03:29:38,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:29:38,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:29:38,458 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:29:40,412 INFO L129 PetriNetUnfolder]: 503/1385 cut-off events. [2020-10-16 03:29:40,412 INFO L130 PetriNetUnfolder]: For 504165/504171 co-relation queries the response was YES. [2020-10-16 03:29:40,450 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 03:29:40,469 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 268 selfloop transitions, 284 changer transitions 0/559 dead transitions. [2020-10-16 03:29:40,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 559 transitions, 28150 flow [2020-10-16 03:29:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 03:29:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 03:29:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2425 transitions. [2020-10-16 03:29:40,471 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6736111111111112 [2020-10-16 03:29:40,471 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2425 transitions. [2020-10-16 03:29:40,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2425 transitions. [2020-10-16 03:29:40,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:29:40,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2425 transitions. [2020-10-16 03:29:40,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 03:29:40,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 03:29:40,474 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 03:29:40,474 INFO L185 Difference]: Start difference. First operand has 763 places, 520 transitions, 23109 flow. Second operand 36 states and 2425 transitions. [2020-10-16 03:29:40,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 559 transitions, 28150 flow [2020-10-16 03:29:43,034 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 03:29:43,056 INFO L241 Difference]: Finished difference. Result has 780 places, 528 transitions, 23909 flow [2020-10-16 03:29:43,056 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 03:29:43,057 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 762 predicate places. [2020-10-16 03:29:43,057 INFO L481 AbstractCegarLoop]: Abstraction has has 780 places, 528 transitions, 23909 flow [2020-10-16 03:29:43,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 03:29:43,057 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:29:43,057 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:29:43,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-16 03:29:43,272 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:29:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:29:43,273 INFO L82 PathProgramCache]: Analyzing trace with hash 627753098, now seen corresponding path program 129 times [2020-10-16 03:29:43,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:29:43,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755738423] [2020-10-16 03:29:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:29:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:43,624 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 03:29:43,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755738423] [2020-10-16 03:29:43,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106257307] [2020-10-16 03:29:43,626 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 03:29:43,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 03:29:43,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:29:43,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:29:43,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:29:43,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:29:43,738 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 03:29:43,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:29:43,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 03:29:43,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377052986] [2020-10-16 03:29:43,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:29:43,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:29:43,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:29:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:29:43,742 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:29:43,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 528 transitions, 23909 flow. Second operand 26 states. [2020-10-16 03:29:43,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:29:43,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:29:43,744 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:29:45,988 INFO L129 PetriNetUnfolder]: 511/1409 cut-off events. [2020-10-16 03:29:45,989 INFO L130 PetriNetUnfolder]: For 512842/512844 co-relation queries the response was YES. [2020-10-16 03:29:46,028 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 03:29:46,047 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 204 selfloop transitions, 358 changer transitions 0/569 dead transitions. [2020-10-16 03:29:46,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 569 transitions, 29174 flow [2020-10-16 03:29:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 03:29:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 03:29:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2494 transitions. [2020-10-16 03:29:46,049 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674054054054054 [2020-10-16 03:29:46,049 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2494 transitions. [2020-10-16 03:29:46,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2494 transitions. [2020-10-16 03:29:46,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:29:46,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2494 transitions. [2020-10-16 03:29:46,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 03:29:46,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 03:29:46,052 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 03:29:46,052 INFO L185 Difference]: Start difference. First operand has 780 places, 528 transitions, 23909 flow. Second operand 37 states and 2494 transitions. [2020-10-16 03:29:46,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 569 transitions, 29174 flow [2020-10-16 03:29:48,940 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 03:29:48,958 INFO L241 Difference]: Finished difference. Result has 797 places, 536 transitions, 24863 flow [2020-10-16 03:29:48,958 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 03:29:48,958 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 779 predicate places. [2020-10-16 03:29:48,958 INFO L481 AbstractCegarLoop]: Abstraction has has 797 places, 536 transitions, 24863 flow [2020-10-16 03:29:48,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:29:48,959 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:29:48,959 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:29:49,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:29:49,165 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:29:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:29:49,165 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 130 times [2020-10-16 03:29:49,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:29:49,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965771009] [2020-10-16 03:29:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:29:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:49,500 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 03:29:49,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965771009] [2020-10-16 03:29:49,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052386433] [2020-10-16 03:29:49,501 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 03:29:49,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:29:49,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:29:49,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:29:49,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:29:49,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:29:49,602 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 03:29:49,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:29:49,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 03:29:49,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132287028] [2020-10-16 03:29:49,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:29:49,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:29:49,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:29:49,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:29:49,605 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:29:49,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 536 transitions, 24863 flow. Second operand 26 states. [2020-10-16 03:29:49,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:29:49,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:29:49,606 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:29:51,993 INFO L129 PetriNetUnfolder]: 513/1415 cut-off events. [2020-10-16 03:29:51,993 INFO L130 PetriNetUnfolder]: For 515830/515832 co-relation queries the response was YES. [2020-10-16 03:29:52,034 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 03:29:52,053 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 164 selfloop transitions, 402 changer transitions 0/573 dead transitions. [2020-10-16 03:29:52,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 573 transitions, 30035 flow [2020-10-16 03:29:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 03:29:52,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 03:29:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2630 transitions. [2020-10-16 03:29:52,055 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743589743589744 [2020-10-16 03:29:52,055 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2630 transitions. [2020-10-16 03:29:52,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2630 transitions. [2020-10-16 03:29:52,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:29:52,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2630 transitions. [2020-10-16 03:29:52,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-16 03:29:52,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-16 03:29:52,058 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-16 03:29:52,058 INFO L185 Difference]: Start difference. First operand has 797 places, 536 transitions, 24863 flow. Second operand 39 states and 2630 transitions. [2020-10-16 03:29:52,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 573 transitions, 30035 flow [2020-10-16 03:29:54,930 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 03:29:54,948 INFO L241 Difference]: Finished difference. Result has 807 places, 538 transitions, 25242 flow [2020-10-16 03:29:54,948 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 03:29:54,949 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 789 predicate places. [2020-10-16 03:29:54,949 INFO L481 AbstractCegarLoop]: Abstraction has has 807 places, 538 transitions, 25242 flow [2020-10-16 03:29:54,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:29:54,949 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:29:54,949 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:29:55,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:29:55,150 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:29:55,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:29:55,150 INFO L82 PathProgramCache]: Analyzing trace with hash -236236724, now seen corresponding path program 131 times [2020-10-16 03:29:55,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:29:55,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513543320] [2020-10-16 03:29:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:29:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:29:55,473 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 03:29:55,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513543320] [2020-10-16 03:29:55,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734208965] [2020-10-16 03:29:55,474 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 03:29:55,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 03:29:55,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:29:55,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:29:55,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:29:55,568 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 03:29:55,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:29:55,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 03:29:55,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321158246] [2020-10-16 03:29:55,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 03:29:55,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:29:55,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 03:29:55,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-10-16 03:29:55,571 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:29:55,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 807 places, 538 transitions, 25242 flow. Second operand 25 states. [2020-10-16 03:29:55,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:29:55,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:29:55,572 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:29:57,910 INFO L129 PetriNetUnfolder]: 517/1427 cut-off events. [2020-10-16 03:29:57,910 INFO L130 PetriNetUnfolder]: For 519654/519660 co-relation queries the response was YES. [2020-10-16 03:29:57,952 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 03:29:57,971 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 116 selfloop transitions, 458 changer transitions 0/581 dead transitions. [2020-10-16 03:29:57,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 581 transitions, 30937 flow [2020-10-16 03:29:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 03:29:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 03:29:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2969 transitions. [2020-10-16 03:29:57,973 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6747727272727273 [2020-10-16 03:29:57,973 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2969 transitions. [2020-10-16 03:29:57,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2969 transitions. [2020-10-16 03:29:57,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:29:57,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2969 transitions. [2020-10-16 03:29:57,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-16 03:29:57,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-16 03:29:57,977 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-16 03:29:57,977 INFO L185 Difference]: Start difference. First operand has 807 places, 538 transitions, 25242 flow. Second operand 44 states and 2969 transitions. [2020-10-16 03:29:57,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 581 transitions, 30937 flow [2020-10-16 03:30:00,790 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 03:30:00,809 INFO L241 Difference]: Finished difference. Result has 817 places, 542 transitions, 25643 flow [2020-10-16 03:30:00,809 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 03:30:00,809 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 799 predicate places. [2020-10-16 03:30:00,809 INFO L481 AbstractCegarLoop]: Abstraction has has 817 places, 542 transitions, 25643 flow [2020-10-16 03:30:00,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 03:30:00,809 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:30:00,810 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:30:01,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:30:01,010 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:30:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:30:01,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1956364368, now seen corresponding path program 132 times [2020-10-16 03:30:01,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:30:01,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073578570] [2020-10-16 03:30:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:30:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:30:01,334 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 03:30:01,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073578570] [2020-10-16 03:30:01,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318360730] [2020-10-16 03:30:01,335 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 03:30:01,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 03:30:01,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:30:01,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:30:01,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:30:01,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:30:01,454 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 03:30:01,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:30:01,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 03:30:01,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473261740] [2020-10-16 03:30:01,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:30:01,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:30:01,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:30:01,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:30:01,457 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:30:01,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 542 transitions, 25643 flow. Second operand 26 states. [2020-10-16 03:30:01,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:30:01,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:30:01,458 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:30:04,073 INFO L129 PetriNetUnfolder]: 521/1439 cut-off events. [2020-10-16 03:30:04,073 INFO L130 PetriNetUnfolder]: For 523243/523245 co-relation queries the response was YES. [2020-10-16 03:30:04,114 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 03:30:04,134 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 112 selfloop transitions, 466 changer transitions 0/585 dead transitions. [2020-10-16 03:30:04,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 859 places, 585 transitions, 31339 flow [2020-10-16 03:30:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 03:30:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 03:30:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2902 transitions. [2020-10-16 03:30:04,136 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748837209302325 [2020-10-16 03:30:04,136 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2902 transitions. [2020-10-16 03:30:04,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2902 transitions. [2020-10-16 03:30:04,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:30:04,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2902 transitions. [2020-10-16 03:30:04,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 44 states. [2020-10-16 03:30:04,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 44 states. [2020-10-16 03:30:04,140 INFO L81 ComplementDD]: Finished complementDD. Result 44 states. [2020-10-16 03:30:04,140 INFO L185 Difference]: Start difference. First operand has 817 places, 542 transitions, 25643 flow. Second operand 43 states and 2902 transitions. [2020-10-16 03:30:04,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 859 places, 585 transitions, 31339 flow [2020-10-16 03:30:06,940 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 03:30:06,962 INFO L241 Difference]: Finished difference. Result has 823 places, 546 transitions, 26073 flow [2020-10-16 03:30:06,963 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 03:30:06,963 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 805 predicate places. [2020-10-16 03:30:06,963 INFO L481 AbstractCegarLoop]: Abstraction has has 823 places, 546 transitions, 26073 flow [2020-10-16 03:30:06,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:30:06,963 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:30:06,963 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:30:07,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 03:30:07,164 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:30:07,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:30:07,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1485368658, now seen corresponding path program 133 times [2020-10-16 03:30:07,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:30:07,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408277535] [2020-10-16 03:30:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:30:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:30:07,476 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 03:30:07,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408277535] [2020-10-16 03:30:07,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201010646] [2020-10-16 03:30:07,477 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 03:30:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:30:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:30:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:30:07,553 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 03:30:07,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:30:07,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 03:30:07,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750888042] [2020-10-16 03:30:07,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 03:30:07,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:30:07,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 03:30:07,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-16 03:30:07,556 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:30:07,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 546 transitions, 26073 flow. Second operand 25 states. [2020-10-16 03:30:07,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:30:07,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:30:07,556 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:30:09,999 INFO L129 PetriNetUnfolder]: 529/1461 cut-off events. [2020-10-16 03:30:10,000 INFO L130 PetriNetUnfolder]: For 531467/531469 co-relation queries the response was YES. [2020-10-16 03:30:10,044 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 03:30:10,064 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 102 selfloop transitions, 487 changer transitions 0/596 dead transitions. [2020-10-16 03:30:10,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 868 places, 596 transitions, 32252 flow [2020-10-16 03:30:10,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-16 03:30:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 03:30:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3105 transitions. [2020-10-16 03:30:10,066 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:30:10,066 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3105 transitions. [2020-10-16 03:30:10,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3105 transitions. [2020-10-16 03:30:10,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:30:10,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3105 transitions. [2020-10-16 03:30:10,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-16 03:30:10,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-16 03:30:10,070 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-16 03:30:10,070 INFO L185 Difference]: Start difference. First operand has 823 places, 546 transitions, 26073 flow. Second operand 46 states and 3105 transitions. [2020-10-16 03:30:10,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 868 places, 596 transitions, 32252 flow [2020-10-16 03:30:13,019 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 03:30:13,043 INFO L241 Difference]: Finished difference. Result has 832 places, 555 transitions, 26757 flow [2020-10-16 03:30:13,044 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 03:30:13,044 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 814 predicate places. [2020-10-16 03:30:13,044 INFO L481 AbstractCegarLoop]: Abstraction has has 832 places, 555 transitions, 26757 flow [2020-10-16 03:30:13,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 03:30:13,044 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:30:13,044 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:30:13,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:30:13,259 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:30:13,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:30:13,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 134 times [2020-10-16 03:30:13,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:30:13,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052549041] [2020-10-16 03:30:13,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:30:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:30:13,576 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 03:30:13,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052549041] [2020-10-16 03:30:13,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581363129] [2020-10-16 03:30:13,577 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 03:30:13,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:30:13,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:30:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:30:13,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:30:13,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:30:13,677 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 03:30:13,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:30:13,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 03:30:13,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334728880] [2020-10-16 03:30:13,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:30:13,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:30:13,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:30:13,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:30:13,680 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:30:13,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 832 places, 555 transitions, 26757 flow. Second operand 26 states. [2020-10-16 03:30:13,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:30:13,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:30:13,680 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:30:16,442 INFO L129 PetriNetUnfolder]: 533/1473 cut-off events. [2020-10-16 03:30:16,442 INFO L130 PetriNetUnfolder]: For 546553/546555 co-relation queries the response was YES. [2020-10-16 03:30:16,486 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 03:30:16,506 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 101 selfloop transitions, 492 changer transitions 0/600 dead transitions. [2020-10-16 03:30:16,506 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 876 places, 600 transitions, 32748 flow [2020-10-16 03:30:16,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-16 03:30:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 03:30:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3038 transitions. [2020-10-16 03:30:16,509 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751111111111111 [2020-10-16 03:30:16,509 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3038 transitions. [2020-10-16 03:30:16,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3038 transitions. [2020-10-16 03:30:16,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:30:16,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3038 transitions. [2020-10-16 03:30:16,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 46 states. [2020-10-16 03:30:16,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 46 states. [2020-10-16 03:30:16,512 INFO L81 ComplementDD]: Finished complementDD. Result 46 states. [2020-10-16 03:30:16,513 INFO L185 Difference]: Start difference. First operand has 832 places, 555 transitions, 26757 flow. Second operand 45 states and 3038 transitions. [2020-10-16 03:30:16,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 876 places, 600 transitions, 32748 flow [2020-10-16 03:30:19,983 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 03:30:20,003 INFO L241 Difference]: Finished difference. Result has 836 places, 559 transitions, 26934 flow [2020-10-16 03:30:20,003 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 03:30:20,003 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 818 predicate places. [2020-10-16 03:30:20,003 INFO L481 AbstractCegarLoop]: Abstraction has has 836 places, 559 transitions, 26934 flow [2020-10-16 03:30:20,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:30:20,004 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:30:20,004 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:30:20,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 03:30:20,204 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:30:20,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:30:20,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 135 times [2020-10-16 03:30:20,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:30:20,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51775412] [2020-10-16 03:30:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:30:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:30:20,515 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 03:30:20,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51775412] [2020-10-16 03:30:20,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846394114] [2020-10-16 03:30:20,516 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 03:30:20,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 03:30:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:30:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:30:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:30:20,602 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 03:30:20,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:30:20,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-16 03:30:20,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129021249] [2020-10-16 03:30:20,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 03:30:20,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:30:20,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 03:30:20,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-16 03:30:20,605 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:30:20,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 836 places, 559 transitions, 26934 flow. Second operand 25 states. [2020-10-16 03:30:20,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:30:20,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:30:20,606 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:30:23,164 INFO L129 PetriNetUnfolder]: 542/1494 cut-off events. [2020-10-16 03:30:23,164 INFO L130 PetriNetUnfolder]: For 567472/567474 co-relation queries the response was YES. [2020-10-16 03:30:23,209 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 03:30:23,230 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 92 selfloop transitions, 510 changer transitions 0/609 dead transitions. [2020-10-16 03:30:23,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 609 transitions, 33664 flow [2020-10-16 03:30:23,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-16 03:30:23,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 03:30:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3242 transitions. [2020-10-16 03:30:23,233 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754166666666667 [2020-10-16 03:30:23,233 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3242 transitions. [2020-10-16 03:30:23,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3242 transitions. [2020-10-16 03:30:23,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:30:23,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3242 transitions. [2020-10-16 03:30:23,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-16 03:30:23,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-16 03:30:23,239 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-16 03:30:23,240 INFO L185 Difference]: Start difference. First operand has 836 places, 559 transitions, 26934 flow. Second operand 48 states and 3242 transitions. [2020-10-16 03:30:23,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 883 places, 609 transitions, 33664 flow [2020-10-16 03:30:26,477 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 03:30:26,496 INFO L241 Difference]: Finished difference. Result has 845 places, 565 transitions, 27628 flow [2020-10-16 03:30:26,497 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 03:30:26,497 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 827 predicate places. [2020-10-16 03:30:26,497 INFO L481 AbstractCegarLoop]: Abstraction has has 845 places, 565 transitions, 27628 flow [2020-10-16 03:30:26,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 03:30:26,497 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:30:26,497 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:30:26,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 03:30:26,698 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:30:26,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:30:26,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1468774668, now seen corresponding path program 136 times [2020-10-16 03:30:26,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:30:26,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057676239] [2020-10-16 03:30:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:30:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:30:27,026 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 03:30:27,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057676239] [2020-10-16 03:30:27,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659490685] [2020-10-16 03:30:27,027 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 03:30:27,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:30:27,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:30:27,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 03:30:27,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:30:27,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:30:27,130 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 03:30:27,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:30:27,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 03:30:27,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655555305] [2020-10-16 03:30:27,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:30:27,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:30:27,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:30:27,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:30:27,133 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:30:27,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 845 places, 565 transitions, 27628 flow. Second operand 26 states. [2020-10-16 03:30:27,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:30:27,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:30:27,133 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:30:30,020 INFO L129 PetriNetUnfolder]: 539/1488 cut-off events. [2020-10-16 03:30:30,021 INFO L130 PetriNetUnfolder]: For 585526/585532 co-relation queries the response was YES. [2020-10-16 03:30:30,066 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 03:30:30,087 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 92 selfloop transitions, 510 changer transitions 0/609 dead transitions. [2020-10-16 03:30:30,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 891 places, 609 transitions, 33818 flow [2020-10-16 03:30:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 03:30:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 03:30:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3174 transitions. [2020-10-16 03:30:30,090 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753191489361702 [2020-10-16 03:30:30,090 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3174 transitions. [2020-10-16 03:30:30,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3174 transitions. [2020-10-16 03:30:30,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:30:30,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3174 transitions. [2020-10-16 03:30:30,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-16 03:30:30,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-16 03:30:30,095 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-16 03:30:30,095 INFO L185 Difference]: Start difference. First operand has 845 places, 565 transitions, 27628 flow. Second operand 47 states and 3174 transitions. [2020-10-16 03:30:30,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 891 places, 609 transitions, 33818 flow [2020-10-16 03:30:33,983 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 03:30:34,002 INFO L241 Difference]: Finished difference. Result has 850 places, 566 transitions, 27484 flow [2020-10-16 03:30:34,003 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 03:30:34,003 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 832 predicate places. [2020-10-16 03:30:34,003 INFO L481 AbstractCegarLoop]: Abstraction has has 850 places, 566 transitions, 27484 flow [2020-10-16 03:30:34,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:30:34,003 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:30:34,003 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:30:34,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-16 03:30:34,204 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:30:34,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:30:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1350895079, now seen corresponding path program 137 times [2020-10-16 03:30:34,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:30:34,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668143727] [2020-10-16 03:30:34,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:30:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:30:34,674 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 03:30:34,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668143727] [2020-10-16 03:30:34,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91002670] [2020-10-16 03:30:34,674 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 03:30:34,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 03:30:34,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:30:34,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:30:34,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:30:34,744 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 03:30:34,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:30:34,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 03:30:34,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554162200] [2020-10-16 03:30:34,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:30:34,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:30:34,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:30:34,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:30:34,746 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:30:34,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 566 transitions, 27484 flow. Second operand 26 states. [2020-10-16 03:30:34,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:30:34,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:30:34,747 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:30:36,701 INFO L129 PetriNetUnfolder]: 541/1494 cut-off events. [2020-10-16 03:30:36,701 INFO L130 PetriNetUnfolder]: For 598508/598510 co-relation queries the response was YES. [2020-10-16 03:30:36,747 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 03:30:36,768 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 508 selfloop transitions, 78 changer transitions 0/593 dead transitions. [2020-10-16 03:30:36,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 877 places, 593 transitions, 31726 flow [2020-10-16 03:30:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 03:30:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 03:30:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1881 transitions. [2020-10-16 03:30:36,770 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6717857142857143 [2020-10-16 03:30:36,770 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1881 transitions. [2020-10-16 03:30:36,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1881 transitions. [2020-10-16 03:30:36,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:30:36,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1881 transitions. [2020-10-16 03:30:36,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-16 03:30:36,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-16 03:30:36,772 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-16 03:30:36,772 INFO L185 Difference]: Start difference. First operand has 850 places, 566 transitions, 27484 flow. Second operand 28 states and 1881 transitions. [2020-10-16 03:30:36,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 877 places, 593 transitions, 31726 flow [2020-10-16 03:30:40,462 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 03:30:40,484 INFO L241 Difference]: Finished difference. Result has 835 places, 568 transitions, 26810 flow [2020-10-16 03:30:40,485 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 03:30:40,485 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 817 predicate places. [2020-10-16 03:30:40,485 INFO L481 AbstractCegarLoop]: Abstraction has has 835 places, 568 transitions, 26810 flow [2020-10-16 03:30:40,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:30:40,485 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:30:40,485 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:30:40,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:30:40,686 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:30:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:30:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1564388865, now seen corresponding path program 138 times [2020-10-16 03:30:40,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:30:40,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35552079] [2020-10-16 03:30:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:30:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:30:41,157 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 03:30:41,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35552079] [2020-10-16 03:30:41,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265136530] [2020-10-16 03:30:41,157 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 03:30:41,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 03:30:41,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:30:41,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:30:41,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:30:41,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:30:41,261 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 03:30:41,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:30:41,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 03:30:41,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136158445] [2020-10-16 03:30:41,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:30:41,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:30:41,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:30:41,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:30:41,263 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:30:41,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 835 places, 568 transitions, 26810 flow. Second operand 27 states. [2020-10-16 03:30:41,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:30:41,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:30:41,264 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:30:43,287 INFO L129 PetriNetUnfolder]: 549/1518 cut-off events. [2020-10-16 03:30:43,288 INFO L130 PetriNetUnfolder]: For 596966/596972 co-relation queries the response was YES. [2020-10-16 03:30:43,334 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 03:30:43,355 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 474 selfloop transitions, 120 changer transitions 0/601 dead transitions. [2020-10-16 03:30:43,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 863 places, 601 transitions, 31420 flow [2020-10-16 03:30:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 03:30:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-16 03:30:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1949 transitions. [2020-10-16 03:30:43,357 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6720689655172414 [2020-10-16 03:30:43,357 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1949 transitions. [2020-10-16 03:30:43,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1949 transitions. [2020-10-16 03:30:43,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:30:43,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1949 transitions. [2020-10-16 03:30:43,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-16 03:30:43,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-16 03:30:43,359 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-16 03:30:43,360 INFO L185 Difference]: Start difference. First operand has 835 places, 568 transitions, 26810 flow. Second operand 29 states and 1949 transitions. [2020-10-16 03:30:43,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 863 places, 601 transitions, 31420 flow [2020-10-16 03:30:46,992 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 03:30:47,017 INFO L241 Difference]: Finished difference. Result has 842 places, 576 transitions, 27376 flow [2020-10-16 03:30:47,017 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 03:30:47,018 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 824 predicate places. [2020-10-16 03:30:47,018 INFO L481 AbstractCegarLoop]: Abstraction has has 842 places, 576 transitions, 27376 flow [2020-10-16 03:30:47,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:30:47,018 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:30:47,018 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:30:47,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 03:30:47,231 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:30:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:30:47,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1550678861, now seen corresponding path program 139 times [2020-10-16 03:30:47,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:30:47,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975241744] [2020-10-16 03:30:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:30:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:30:47,686 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 03:30:47,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975241744] [2020-10-16 03:30:47,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049266306] [2020-10-16 03:30:47,687 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 03:30:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:30:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:30:47,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:30:47,750 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 03:30:47,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:30:47,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 03:30:47,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008755255] [2020-10-16 03:30:47,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:30:47,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:30:47,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:30:47,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:30:47,752 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:30:47,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 842 places, 576 transitions, 27376 flow. Second operand 26 states. [2020-10-16 03:30:47,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:30:47,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:30:47,753 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:30:49,885 INFO L129 PetriNetUnfolder]: 557/1542 cut-off events. [2020-10-16 03:30:49,885 INFO L130 PetriNetUnfolder]: For 618745/618751 co-relation queries the response was YES. [2020-10-16 03:30:49,933 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 03:30:49,954 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 432 selfloop transitions, 172 changer transitions 0/611 dead transitions. [2020-10-16 03:30:49,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 871 places, 611 transitions, 32274 flow [2020-10-16 03:30:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 03:30:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-16 03:30:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2017 transitions. [2020-10-16 03:30:49,956 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6723333333333333 [2020-10-16 03:30:49,956 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2017 transitions. [2020-10-16 03:30:49,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2017 transitions. [2020-10-16 03:30:49,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:30:49,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2017 transitions. [2020-10-16 03:30:49,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-16 03:30:49,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-16 03:30:49,959 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-16 03:30:49,959 INFO L185 Difference]: Start difference. First operand has 842 places, 576 transitions, 27376 flow. Second operand 30 states and 2017 transitions. [2020-10-16 03:30:49,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 871 places, 611 transitions, 32274 flow [2020-10-16 03:30:54,079 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 03:30:54,099 INFO L241 Difference]: Finished difference. Result has 851 places, 584 transitions, 27986 flow [2020-10-16 03:30:54,099 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 03:30:54,099 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 833 predicate places. [2020-10-16 03:30:54,099 INFO L481 AbstractCegarLoop]: Abstraction has has 851 places, 584 transitions, 27986 flow [2020-10-16 03:30:54,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:30:54,100 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:30:54,100 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:30:54,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:30:54,300 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:30:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:30:54,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1022539031, now seen corresponding path program 140 times [2020-10-16 03:30:54,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:30:54,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595527925] [2020-10-16 03:30:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:30:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:30:54,750 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 03:30:54,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595527925] [2020-10-16 03:30:54,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845013205] [2020-10-16 03:30:54,751 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 03:30:54,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:30:54,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:30:54,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:30:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:30:54,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:30:54,844 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 03:30:54,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:30:54,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 03:30:54,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456696292] [2020-10-16 03:30:54,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:30:54,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:30:54,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:30:54,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:30:54,847 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:30:54,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 584 transitions, 27986 flow. Second operand 27 states. [2020-10-16 03:30:54,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:30:54,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:30:54,847 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:30:57,108 INFO L129 PetriNetUnfolder]: 561/1554 cut-off events. [2020-10-16 03:30:57,108 INFO L130 PetriNetUnfolder]: For 622755/622757 co-relation queries the response was YES. [2020-10-16 03:30:57,156 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 03:30:57,178 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 398 selfloop transitions, 210 changer transitions 0/615 dead transitions. [2020-10-16 03:30:57,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 881 places, 615 transitions, 32613 flow [2020-10-16 03:30:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 03:30:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 03:30:57,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2085 transitions. [2020-10-16 03:30:57,180 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6725806451612903 [2020-10-16 03:30:57,180 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2085 transitions. [2020-10-16 03:30:57,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2085 transitions. [2020-10-16 03:30:57,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:30:57,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2085 transitions. [2020-10-16 03:30:57,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 03:30:57,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 03:30:57,183 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 03:30:57,183 INFO L185 Difference]: Start difference. First operand has 851 places, 584 transitions, 27986 flow. Second operand 31 states and 2085 transitions. [2020-10-16 03:30:57,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 881 places, 615 transitions, 32613 flow [2020-10-16 03:31:01,468 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 03:31:01,487 INFO L241 Difference]: Finished difference. Result has 858 places, 588 transitions, 28289 flow [2020-10-16 03:31:01,488 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 03:31:01,488 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 840 predicate places. [2020-10-16 03:31:01,488 INFO L481 AbstractCegarLoop]: Abstraction has has 858 places, 588 transitions, 28289 flow [2020-10-16 03:31:01,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:31:01,488 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:31:01,488 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:31:01,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:31:01,689 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:31:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:31:01,689 INFO L82 PathProgramCache]: Analyzing trace with hash -161385579, now seen corresponding path program 141 times [2020-10-16 03:31:01,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:31:01,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440974831] [2020-10-16 03:31:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:31:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:31:02,106 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 03:31:02,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440974831] [2020-10-16 03:31:02,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950490893] [2020-10-16 03:31:02,107 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 03:31:02,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 03:31:02,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:31:02,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:31:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:31:02,183 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 03:31:02,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:31:02,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 03:31:02,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057038216] [2020-10-16 03:31:02,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:31:02,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:31:02,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:31:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:31:02,185 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:31:02,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 858 places, 588 transitions, 28289 flow. Second operand 26 states. [2020-10-16 03:31:02,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:31:02,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:31:02,186 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:31:04,508 INFO L129 PetriNetUnfolder]: 571/1584 cut-off events. [2020-10-16 03:31:04,508 INFO L130 PetriNetUnfolder]: For 633710/633712 co-relation queries the response was YES. [2020-10-16 03:31:04,550 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 03:31:04,573 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 362 selfloop transitions, 258 changer transitions 0/627 dead transitions. [2020-10-16 03:31:04,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 889 places, 627 transitions, 33575 flow [2020-10-16 03:31:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 03:31:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 03:31:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2153 transitions. [2020-10-16 03:31:04,575 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6728125 [2020-10-16 03:31:04,575 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2153 transitions. [2020-10-16 03:31:04,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2153 transitions. [2020-10-16 03:31:04,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:31:04,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2153 transitions. [2020-10-16 03:31:04,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 03:31:04,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 03:31:04,578 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 03:31:04,579 INFO L185 Difference]: Start difference. First operand has 858 places, 588 transitions, 28289 flow. Second operand 32 states and 2153 transitions. [2020-10-16 03:31:04,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 889 places, 627 transitions, 33575 flow [2020-10-16 03:31:08,711 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 03:31:08,732 INFO L241 Difference]: Finished difference. Result has 867 places, 598 transitions, 29112 flow [2020-10-16 03:31:08,732 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 03:31:08,732 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 849 predicate places. [2020-10-16 03:31:08,732 INFO L481 AbstractCegarLoop]: Abstraction has has 867 places, 598 transitions, 29112 flow [2020-10-16 03:31:08,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:31:08,732 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:31:08,733 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:31:08,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:31:08,933 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:31:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:31:08,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1684707137, now seen corresponding path program 142 times [2020-10-16 03:31:08,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:31:08,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675639484] [2020-10-16 03:31:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:31:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:31:09,333 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 03:31:09,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675639484] [2020-10-16 03:31:09,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415047859] [2020-10-16 03:31:09,334 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 03:31:09,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:31:09,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:31:09,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:31:09,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:31:09,407 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 03:31:09,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:31:09,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 03:31:09,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827612019] [2020-10-16 03:31:09,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:31:09,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:31:09,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:31:09,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:31:09,410 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:31:09,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 867 places, 598 transitions, 29112 flow. Second operand 26 states. [2020-10-16 03:31:09,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:31:09,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:31:09,410 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:31:11,761 INFO L129 PetriNetUnfolder]: 575/1596 cut-off events. [2020-10-16 03:31:11,761 INFO L130 PetriNetUnfolder]: For 638723/638729 co-relation queries the response was YES. [2020-10-16 03:31:11,812 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 03:31:11,834 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 298 selfloop transitions, 328 changer transitions 0/633 dead transitions. [2020-10-16 03:31:11,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 633 transitions, 34221 flow [2020-10-16 03:31:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 03:31:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 03:31:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2289 transitions. [2020-10-16 03:31:11,836 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.673235294117647 [2020-10-16 03:31:11,836 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2289 transitions. [2020-10-16 03:31:11,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2289 transitions. [2020-10-16 03:31:11,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:31:11,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2289 transitions. [2020-10-16 03:31:11,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-16 03:31:11,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-16 03:31:11,840 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-16 03:31:11,840 INFO L185 Difference]: Start difference. First operand has 867 places, 598 transitions, 29112 flow. Second operand 34 states and 2289 transitions. [2020-10-16 03:31:11,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 900 places, 633 transitions, 34221 flow [2020-10-16 03:31:16,451 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 03:31:16,477 INFO L241 Difference]: Finished difference. Result has 877 places, 602 transitions, 29570 flow [2020-10-16 03:31:16,478 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 03:31:16,478 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 859 predicate places. [2020-10-16 03:31:16,478 INFO L481 AbstractCegarLoop]: Abstraction has has 877 places, 602 transitions, 29570 flow [2020-10-16 03:31:16,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:31:16,478 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:31:16,479 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:31:16,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:31:16,692 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:31:16,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:31:16,693 INFO L82 PathProgramCache]: Analyzing trace with hash 473085275, now seen corresponding path program 143 times [2020-10-16 03:31:16,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:31:16,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350595730] [2020-10-16 03:31:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:31:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:31:17,106 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 03:31:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350595730] [2020-10-16 03:31:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845169526] [2020-10-16 03:31:17,107 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 03:31:17,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 03:31:17,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:31:17,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:31:17,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:31:17,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:31:17,228 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 03:31:17,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:31:17,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 03:31:17,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977788734] [2020-10-16 03:31:17,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:31:17,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:31:17,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:31:17,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:31:17,232 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:31:17,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 877 places, 602 transitions, 29570 flow. Second operand 27 states. [2020-10-16 03:31:17,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:31:17,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:31:17,233 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:31:19,721 INFO L129 PetriNetUnfolder]: 591/1644 cut-off events. [2020-10-16 03:31:19,721 INFO L130 PetriNetUnfolder]: For 657172/657174 co-relation queries the response was YES. [2020-10-16 03:31:19,783 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 03:31:19,806 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 284 selfloop transitions, 358 changer transitions 0/649 dead transitions. [2020-10-16 03:31:19,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 911 places, 649 transitions, 35428 flow [2020-10-16 03:31:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 03:31:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-16 03:31:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2357 transitions. [2020-10-16 03:31:19,808 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734285714285714 [2020-10-16 03:31:19,808 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2357 transitions. [2020-10-16 03:31:19,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2357 transitions. [2020-10-16 03:31:19,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:31:19,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2357 transitions. [2020-10-16 03:31:19,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-16 03:31:19,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-16 03:31:19,811 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-16 03:31:19,811 INFO L185 Difference]: Start difference. First operand has 877 places, 602 transitions, 29570 flow. Second operand 35 states and 2357 transitions. [2020-10-16 03:31:19,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 911 places, 649 transitions, 35428 flow [2020-10-16 03:31:23,939 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 03:31:23,960 INFO L241 Difference]: Finished difference. Result has 893 places, 618 transitions, 30980 flow [2020-10-16 03:31:23,961 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 03:31:23,961 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 875 predicate places. [2020-10-16 03:31:23,961 INFO L481 AbstractCegarLoop]: Abstraction has has 893 places, 618 transitions, 30980 flow [2020-10-16 03:31:23,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:31:23,961 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:31:23,961 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:31:24,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:31:24,162 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:31:24,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:31:24,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1492282745, now seen corresponding path program 144 times [2020-10-16 03:31:24,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:31:24,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191629739] [2020-10-16 03:31:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:31:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:31:24,556 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 03:31:24,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191629739] [2020-10-16 03:31:24,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304766422] [2020-10-16 03:31:24,556 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 03:31:24,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 03:31:24,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:31:24,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:31:24,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:31:24,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:31:24,666 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 03:31:24,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:31:24,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 03:31:24,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336899558] [2020-10-16 03:31:24,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:31:24,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:31:24,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:31:24,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:31:24,668 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:31:24,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 893 places, 618 transitions, 30980 flow. Second operand 27 states. [2020-10-16 03:31:24,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:31:24,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:31:24,669 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:31:27,434 INFO L129 PetriNetUnfolder]: 595/1656 cut-off events. [2020-10-16 03:31:27,434 INFO L130 PetriNetUnfolder]: For 664334/664336 co-relation queries the response was YES. [2020-10-16 03:31:27,488 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 03:31:27,511 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 230 selfloop transitions, 418 changer transitions 0/655 dead transitions. [2020-10-16 03:31:27,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 929 places, 655 transitions, 36355 flow [2020-10-16 03:31:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 03:31:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 03:31:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2493 transitions. [2020-10-16 03:31:27,513 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6737837837837838 [2020-10-16 03:31:27,513 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2493 transitions. [2020-10-16 03:31:27,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2493 transitions. [2020-10-16 03:31:27,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:31:27,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2493 transitions. [2020-10-16 03:31:27,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 03:31:27,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 03:31:27,516 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 03:31:27,516 INFO L185 Difference]: Start difference. First operand has 893 places, 618 transitions, 30980 flow. Second operand 37 states and 2493 transitions. [2020-10-16 03:31:27,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 929 places, 655 transitions, 36355 flow [2020-10-16 03:31:32,033 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 03:31:32,060 INFO L241 Difference]: Finished difference. Result has 909 places, 622 transitions, 31697 flow [2020-10-16 03:31:32,061 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 03:31:32,061 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 891 predicate places. [2020-10-16 03:31:32,061 INFO L481 AbstractCegarLoop]: Abstraction has has 909 places, 622 transitions, 31697 flow [2020-10-16 03:31:32,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:31:32,062 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:31:32,062 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:31:32,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 03:31:32,272 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:31:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:31:32,272 INFO L82 PathProgramCache]: Analyzing trace with hash -803960955, now seen corresponding path program 145 times [2020-10-16 03:31:32,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:31:32,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471622005] [2020-10-16 03:31:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:31:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:31:32,669 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 03:31:32,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471622005] [2020-10-16 03:31:32,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11582373] [2020-10-16 03:31:32,670 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 03:31:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:31:32,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:31:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:31:32,744 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 03:31:32,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:31:32,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 03:31:32,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490527040] [2020-10-16 03:31:32,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:31:32,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:31:32,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:31:32,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:31:32,747 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:31:32,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 909 places, 622 transitions, 31697 flow. Second operand 26 states. [2020-10-16 03:31:32,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:31:32,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:31:32,747 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:31:35,200 INFO L129 PetriNetUnfolder]: 599/1668 cut-off events. [2020-10-16 03:31:35,200 INFO L130 PetriNetUnfolder]: For 668575/668577 co-relation queries the response was YES. [2020-10-16 03:31:35,255 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 03:31:35,278 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 200 selfloop transitions, 454 changer transitions 0/661 dead transitions. [2020-10-16 03:31:35,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 946 places, 661 transitions, 37316 flow [2020-10-16 03:31:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 03:31:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 03:31:35,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2561 transitions. [2020-10-16 03:31:35,280 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6739473684210526 [2020-10-16 03:31:35,280 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2561 transitions. [2020-10-16 03:31:35,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2561 transitions. [2020-10-16 03:31:35,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:31:35,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2561 transitions. [2020-10-16 03:31:35,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 39 states. [2020-10-16 03:31:35,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 39 states. [2020-10-16 03:31:35,283 INFO L81 ComplementDD]: Finished complementDD. Result 39 states. [2020-10-16 03:31:35,283 INFO L185 Difference]: Start difference. First operand has 909 places, 622 transitions, 31697 flow. Second operand 38 states and 2561 transitions. [2020-10-16 03:31:35,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 946 places, 661 transitions, 37316 flow [2020-10-16 03:31:39,668 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 03:31:39,690 INFO L241 Difference]: Finished difference. Result has 913 places, 626 transitions, 32042 flow [2020-10-16 03:31:39,691 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 03:31:39,691 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 895 predicate places. [2020-10-16 03:31:39,691 INFO L481 AbstractCegarLoop]: Abstraction has has 913 places, 626 transitions, 32042 flow [2020-10-16 03:31:39,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:31:39,691 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:31:39,691 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:31:39,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 03:31:39,892 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:31:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:31:39,893 INFO L82 PathProgramCache]: Analyzing trace with hash 181230569, now seen corresponding path program 146 times [2020-10-16 03:31:39,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:31:39,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203014892] [2020-10-16 03:31:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:31:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:31:40,273 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 03:31:40,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203014892] [2020-10-16 03:31:40,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933089481] [2020-10-16 03:31:40,273 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 03:31:40,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:31:40,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:31:40,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:31:40,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:31:40,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:31:40,373 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 03:31:40,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:31:40,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 03:31:40,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103714875] [2020-10-16 03:31:40,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:31:40,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:31:40,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:31:40,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:31:40,376 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:31:40,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 913 places, 626 transitions, 32042 flow. Second operand 27 states. [2020-10-16 03:31:40,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:31:40,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:31:40,378 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:31:43,335 INFO L129 PetriNetUnfolder]: 601/1674 cut-off events. [2020-10-16 03:31:43,335 INFO L130 PetriNetUnfolder]: For 670934/670940 co-relation queries the response was YES. [2020-10-16 03:31:43,391 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 03:31:43,414 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 180 selfloop transitions, 476 changer transitions 0/663 dead transitions. [2020-10-16 03:31:43,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 951 places, 663 transitions, 37566 flow [2020-10-16 03:31:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 03:31:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 03:31:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2629 transitions. [2020-10-16 03:31:43,416 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741025641025641 [2020-10-16 03:31:43,416 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2629 transitions. [2020-10-16 03:31:43,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2629 transitions. [2020-10-16 03:31:43,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:31:43,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2629 transitions. [2020-10-16 03:31:43,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-16 03:31:43,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-16 03:31:43,420 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-16 03:31:43,420 INFO L185 Difference]: Start difference. First operand has 913 places, 626 transitions, 32042 flow. Second operand 39 states and 2629 transitions. [2020-10-16 03:31:43,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 951 places, 663 transitions, 37566 flow [2020-10-16 03:31:47,826 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 03:31:47,849 INFO L241 Difference]: Finished difference. Result has 918 places, 628 transitions, 32298 flow [2020-10-16 03:31:47,849 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 03:31:47,849 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 900 predicate places. [2020-10-16 03:31:47,849 INFO L481 AbstractCegarLoop]: Abstraction has has 918 places, 628 transitions, 32298 flow [2020-10-16 03:31:47,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:31:47,849 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:31:47,850 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:31:48,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 03:31:48,050 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:31:48,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:31:48,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1837001699, now seen corresponding path program 147 times [2020-10-16 03:31:48,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:31:48,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907817744] [2020-10-16 03:31:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:31:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:31:48,438 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 03:31:48,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907817744] [2020-10-16 03:31:48,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298860071] [2020-10-16 03:31:48,438 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 03:31:48,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 03:31:48,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:31:48,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:31:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:31:48,520 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 03:31:48,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:31:48,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 03:31:48,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874759204] [2020-10-16 03:31:48,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:31:48,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:31:48,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:31:48,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:31:48,522 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:31:48,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 918 places, 628 transitions, 32298 flow. Second operand 26 states. [2020-10-16 03:31:48,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:31:48,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:31:48,523 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:31:51,335 INFO L129 PetriNetUnfolder]: 609/1698 cut-off events. [2020-10-16 03:31:51,335 INFO L130 PetriNetUnfolder]: For 679680/679682 co-relation queries the response was YES. [2020-10-16 03:31:51,391 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 03:31:51,415 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 158 selfloop transitions, 508 changer transitions 0/673 dead transitions. [2020-10-16 03:31:51,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 957 places, 673 transitions, 38344 flow [2020-10-16 03:31:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 03:31:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 03:31:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2697 transitions. [2020-10-16 03:31:51,418 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67425 [2020-10-16 03:31:51,418 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2697 transitions. [2020-10-16 03:31:51,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2697 transitions. [2020-10-16 03:31:51,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:31:51,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2697 transitions. [2020-10-16 03:31:51,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 03:31:51,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 03:31:51,421 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 03:31:51,421 INFO L185 Difference]: Start difference. First operand has 918 places, 628 transitions, 32298 flow. Second operand 40 states and 2697 transitions. [2020-10-16 03:31:51,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 957 places, 673 transitions, 38344 flow [2020-10-16 03:31:56,259 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 03:31:56,282 INFO L241 Difference]: Finished difference. Result has 926 places, 636 transitions, 33020 flow [2020-10-16 03:31:56,283 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 03:31:56,283 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 908 predicate places. [2020-10-16 03:31:56,283 INFO L481 AbstractCegarLoop]: Abstraction has has 926 places, 636 transitions, 33020 flow [2020-10-16 03:31:56,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:31:56,283 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:31:56,283 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:31:56,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 03:31:56,484 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:31:56,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:31:56,484 INFO L82 PathProgramCache]: Analyzing trace with hash -179038773, now seen corresponding path program 148 times [2020-10-16 03:31:56,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:31:56,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973792805] [2020-10-16 03:31:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:31:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:31:56,864 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 03:31:56,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973792805] [2020-10-16 03:31:56,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269228825] [2020-10-16 03:31:56,865 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 03:31:56,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:31:56,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:31:56,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:31:56,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:31:56,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:31:56,969 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 03:31:56,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:31:56,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 03:31:56,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122507790] [2020-10-16 03:31:56,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:31:56,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:31:56,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:31:56,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:31:56,972 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:31:56,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 926 places, 636 transitions, 33020 flow. Second operand 27 states. [2020-10-16 03:31:56,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:31:56,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:31:56,972 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:32:00,162 INFO L129 PetriNetUnfolder]: 611/1704 cut-off events. [2020-10-16 03:32:00,162 INFO L130 PetriNetUnfolder]: For 682978/682984 co-relation queries the response was YES. [2020-10-16 03:32:00,219 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 03:32:00,243 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 142 selfloop transitions, 526 changer transitions 0/675 dead transitions. [2020-10-16 03:32:00,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 966 places, 675 transitions, 38796 flow [2020-10-16 03:32:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 03:32:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 03:32:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2765 transitions. [2020-10-16 03:32:00,246 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743902439024391 [2020-10-16 03:32:00,246 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2765 transitions. [2020-10-16 03:32:00,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2765 transitions. [2020-10-16 03:32:00,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:32:00,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2765 transitions. [2020-10-16 03:32:00,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-16 03:32:00,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-16 03:32:00,249 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-16 03:32:00,249 INFO L185 Difference]: Start difference. First operand has 926 places, 636 transitions, 33020 flow. Second operand 41 states and 2765 transitions. [2020-10-16 03:32:00,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 966 places, 675 transitions, 38796 flow [2020-10-16 03:32:04,471 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 03:32:04,494 INFO L241 Difference]: Finished difference. Result has 940 places, 638 transitions, 33653 flow [2020-10-16 03:32:04,495 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 03:32:04,495 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 922 predicate places. [2020-10-16 03:32:04,495 INFO L481 AbstractCegarLoop]: Abstraction has has 940 places, 638 transitions, 33653 flow [2020-10-16 03:32:04,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:32:04,495 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:32:04,495 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:32:04,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:32:04,696 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:32:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:32:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1036080511, now seen corresponding path program 149 times [2020-10-16 03:32:04,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:32:04,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119020960] [2020-10-16 03:32:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:32:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:32:05,066 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 03:32:05,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119020960] [2020-10-16 03:32:05,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764319886] [2020-10-16 03:32:05,067 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 03:32:05,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 03:32:05,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:32:05,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:32:05,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:32:05,155 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 03:32:05,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:32:05,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 03:32:05,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883303086] [2020-10-16 03:32:05,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:32:05,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:32:05,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:32:05,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:32:05,157 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:32:05,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 940 places, 638 transitions, 33653 flow. Second operand 26 states. [2020-10-16 03:32:05,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:32:05,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:32:05,158 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:32:08,138 INFO L129 PetriNetUnfolder]: 621/1734 cut-off events. [2020-10-16 03:32:08,138 INFO L130 PetriNetUnfolder]: For 694033/694035 co-relation queries the response was YES. [2020-10-16 03:32:08,197 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 03:32:08,221 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 127 selfloop transitions, 554 changer transitions 0/688 dead transitions. [2020-10-16 03:32:08,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 981 places, 688 transitions, 40008 flow [2020-10-16 03:32:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 03:32:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 03:32:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2833 transitions. [2020-10-16 03:32:08,223 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745238095238095 [2020-10-16 03:32:08,224 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2833 transitions. [2020-10-16 03:32:08,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2833 transitions. [2020-10-16 03:32:08,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:32:08,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2833 transitions. [2020-10-16 03:32:08,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-16 03:32:08,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-16 03:32:08,227 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-16 03:32:08,227 INFO L185 Difference]: Start difference. First operand has 940 places, 638 transitions, 33653 flow. Second operand 42 states and 2833 transitions. [2020-10-16 03:32:08,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 981 places, 688 transitions, 40008 flow [2020-10-16 03:32:12,816 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 03:32:12,840 INFO L241 Difference]: Finished difference. Result has 952 places, 649 transitions, 34698 flow [2020-10-16 03:32:12,841 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 03:32:12,841 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 934 predicate places. [2020-10-16 03:32:12,841 INFO L481 AbstractCegarLoop]: Abstraction has has 952 places, 649 transitions, 34698 flow [2020-10-16 03:32:12,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:32:12,841 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:32:12,841 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:32:13,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-16 03:32:13,042 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:32:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:32:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash -682759253, now seen corresponding path program 150 times [2020-10-16 03:32:13,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:32:13,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025503034] [2020-10-16 03:32:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:32:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:32:13,392 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 03:32:13,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025503034] [2020-10-16 03:32:13,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043370837] [2020-10-16 03:32:13,393 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 03:32:13,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 03:32:13,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:32:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:32:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:32:13,477 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 03:32:13,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:32:13,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 03:32:13,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756552809] [2020-10-16 03:32:13,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:32:13,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:32:13,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:32:13,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:32:13,479 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:32:13,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 952 places, 649 transitions, 34698 flow. Second operand 26 states. [2020-10-16 03:32:13,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:32:13,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:32:13,480 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:32:16,597 INFO L129 PetriNetUnfolder]: 623/1740 cut-off events. [2020-10-16 03:32:16,597 INFO L130 PetriNetUnfolder]: For 698638/698640 co-relation queries the response was YES. [2020-10-16 03:32:16,658 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 03:32:16,885 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 103 selfloop transitions, 582 changer transitions 0/692 dead transitions. [2020-10-16 03:32:16,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 692 transitions, 40964 flow [2020-10-16 03:32:16,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 03:32:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 03:32:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2969 transitions. [2020-10-16 03:32:16,887 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6747727272727273 [2020-10-16 03:32:16,887 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2969 transitions. [2020-10-16 03:32:16,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2969 transitions. [2020-10-16 03:32:16,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:32:16,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2969 transitions. [2020-10-16 03:32:16,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-16 03:32:16,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-16 03:32:16,891 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-16 03:32:16,891 INFO L185 Difference]: Start difference. First operand has 952 places, 649 transitions, 34698 flow. Second operand 44 states and 2969 transitions. [2020-10-16 03:32:16,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 692 transitions, 40964 flow [2020-10-16 03:32:21,361 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 03:32:21,392 INFO L241 Difference]: Finished difference. Result has 960 places, 651 transitions, 35151 flow [2020-10-16 03:32:21,392 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 03:32:21,393 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 942 predicate places. [2020-10-16 03:32:21,393 INFO L481 AbstractCegarLoop]: Abstraction has has 960 places, 651 transitions, 35151 flow [2020-10-16 03:32:21,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:32:21,393 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:32:21,393 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:32:21,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:32:21,608 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:32:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:32:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1892080399, now seen corresponding path program 151 times [2020-10-16 03:32:21,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:32:21,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755609304] [2020-10-16 03:32:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:32:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:32:21,970 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 03:32:21,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755609304] [2020-10-16 03:32:21,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849454945] [2020-10-16 03:32:21,971 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 03:32:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:32:22,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:32:22,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:32:22,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:32:22,075 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 03:32:22,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:32:22,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 03:32:22,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139932900] [2020-10-16 03:32:22,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:32:22,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:32:22,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:32:22,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:32:22,077 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:32:22,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 960 places, 651 transitions, 35151 flow. Second operand 27 states. [2020-10-16 03:32:22,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:32:22,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:32:22,078 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:32:25,600 INFO L129 PetriNetUnfolder]: 627/1752 cut-off events. [2020-10-16 03:32:25,600 INFO L130 PetriNetUnfolder]: For 703329/703335 co-relation queries the response was YES. [2020-10-16 03:32:25,661 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 03:32:25,685 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 97 selfloop transitions, 592 changer transitions 0/696 dead transitions. [2020-10-16 03:32:25,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1004 places, 696 transitions, 41483 flow [2020-10-16 03:32:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-16 03:32:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 03:32:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3037 transitions. [2020-10-16 03:32:25,688 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748888888888889 [2020-10-16 03:32:25,688 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3037 transitions. [2020-10-16 03:32:25,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3037 transitions. [2020-10-16 03:32:25,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:32:25,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3037 transitions. [2020-10-16 03:32:25,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 46 states. [2020-10-16 03:32:25,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 46 states. [2020-10-16 03:32:25,692 INFO L81 ComplementDD]: Finished complementDD. Result 46 states. [2020-10-16 03:32:25,692 INFO L185 Difference]: Start difference. First operand has 960 places, 651 transitions, 35151 flow. Second operand 45 states and 3037 transitions. [2020-10-16 03:32:25,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1004 places, 696 transitions, 41483 flow [2020-10-16 03:32:30,424 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 03:32:30,449 INFO L241 Difference]: Finished difference. Result has 969 places, 655 transitions, 35725 flow [2020-10-16 03:32:30,449 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 03:32:30,449 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 951 predicate places. [2020-10-16 03:32:30,449 INFO L481 AbstractCegarLoop]: Abstraction has has 969 places, 655 transitions, 35725 flow [2020-10-16 03:32:30,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:32:30,450 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:32:30,450 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:32:30,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:32:30,650 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:32:30,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:32:30,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1962002883, now seen corresponding path program 152 times [2020-10-16 03:32:30,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:32:30,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047467528] [2020-10-16 03:32:30,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:32:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:32:31,011 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 03:32:31,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047467528] [2020-10-16 03:32:31,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376051961] [2020-10-16 03:32:31,012 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 03:32:31,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:32:31,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:32:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:32:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:32:31,090 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 03:32:31,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:32:31,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 03:32:31,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140893593] [2020-10-16 03:32:31,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:32:31,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:32:31,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:32:31,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:32:31,092 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:32:31,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 655 transitions, 35725 flow. Second operand 26 states. [2020-10-16 03:32:31,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:32:31,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:32:31,093 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:32:34,390 INFO L129 PetriNetUnfolder]: 631/1763 cut-off events. [2020-10-16 03:32:34,390 INFO L130 PetriNetUnfolder]: For 708997/709003 co-relation queries the response was YES. [2020-10-16 03:32:34,444 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 03:32:34,470 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 84 selfloop transitions, 612 changer transitions 0/703 dead transitions. [2020-10-16 03:32:34,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1014 places, 703 transitions, 42423 flow [2020-10-16 03:32:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-16 03:32:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 03:32:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3105 transitions. [2020-10-16 03:32:34,473 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:32:34,473 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3105 transitions. [2020-10-16 03:32:34,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3105 transitions. [2020-10-16 03:32:34,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:32:34,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3105 transitions. [2020-10-16 03:32:34,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-16 03:32:34,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-16 03:32:34,476 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-16 03:32:34,476 INFO L185 Difference]: Start difference. First operand has 969 places, 655 transitions, 35725 flow. Second operand 46 states and 3105 transitions. [2020-10-16 03:32:34,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1014 places, 703 transitions, 42423 flow [2020-10-16 03:32:39,191 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 03:32:39,216 INFO L241 Difference]: Finished difference. Result has 976 places, 660 transitions, 36398 flow [2020-10-16 03:32:39,216 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 03:32:39,217 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 958 predicate places. [2020-10-16 03:32:39,217 INFO L481 AbstractCegarLoop]: Abstraction has has 976 places, 660 transitions, 36398 flow [2020-10-16 03:32:39,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:32:39,217 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:32:39,217 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:32:39,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-16 03:32:39,423 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:32:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:32:39,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1978090023, now seen corresponding path program 153 times [2020-10-16 03:32:39,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:32:39,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845799470] [2020-10-16 03:32:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:32:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:32:39,790 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 03:32:39,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845799470] [2020-10-16 03:32:39,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524599087] [2020-10-16 03:32:39,791 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 03:32:39,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 03:32:39,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:32:39,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:32:39,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:32:39,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:32:39,906 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 03:32:39,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:32:39,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 03:32:39,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673836837] [2020-10-16 03:32:39,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:32:39,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:32:39,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:32:39,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:32:39,908 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:32:39,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 976 places, 660 transitions, 36398 flow. Second operand 27 states. [2020-10-16 03:32:39,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:32:39,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:32:39,909 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:32:43,610 INFO L129 PetriNetUnfolder]: 633/1769 cut-off events. [2020-10-16 03:32:43,610 INFO L130 PetriNetUnfolder]: For 725835/725837 co-relation queries the response was YES. [2020-10-16 03:32:43,673 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 03:32:43,698 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 80 selfloop transitions, 618 changer transitions 0/705 dead transitions. [2020-10-16 03:32:43,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1022 places, 705 transitions, 42962 flow [2020-10-16 03:32:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 03:32:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 03:32:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3173 transitions. [2020-10-16 03:32:43,701 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751063829787234 [2020-10-16 03:32:43,701 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3173 transitions. [2020-10-16 03:32:43,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3173 transitions. [2020-10-16 03:32:43,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:32:43,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3173 transitions. [2020-10-16 03:32:43,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-16 03:32:43,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-16 03:32:43,705 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-16 03:32:43,705 INFO L185 Difference]: Start difference. First operand has 976 places, 660 transitions, 36398 flow. Second operand 47 states and 3173 transitions. [2020-10-16 03:32:43,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1022 places, 705 transitions, 42962 flow [2020-10-16 03:32:48,885 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 03:32:48,916 INFO L241 Difference]: Finished difference. Result has 979 places, 662 transitions, 36610 flow [2020-10-16 03:32:48,917 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 03:32:48,917 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 961 predicate places. [2020-10-16 03:32:48,917 INFO L481 AbstractCegarLoop]: Abstraction has has 979 places, 662 transitions, 36610 flow [2020-10-16 03:32:48,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:32:48,918 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:32:48,918 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:32:49,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:32:49,128 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:32:49,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:32:49,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1915313937, now seen corresponding path program 154 times [2020-10-16 03:32:49,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:32:49,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048779626] [2020-10-16 03:32:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:32:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:32:49,481 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 03:32:49,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048779626] [2020-10-16 03:32:49,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143849780] [2020-10-16 03:32:49,482 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 03:32:49,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:32:49,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:32:49,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:32:49,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:32:49,563 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 03:32:49,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:32:49,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-16 03:32:49,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340306651] [2020-10-16 03:32:49,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 03:32:49,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:32:49,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 03:32:49,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-16 03:32:49,566 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:32:49,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 979 places, 662 transitions, 36610 flow. Second operand 26 states. [2020-10-16 03:32:49,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:32:49,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:32:49,566 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:32:52,907 INFO L129 PetriNetUnfolder]: 642/1789 cut-off events. [2020-10-16 03:32:52,907 INFO L130 PetriNetUnfolder]: For 751248/751254 co-relation queries the response was YES. [2020-10-16 03:32:52,969 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 03:32:52,995 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 73 selfloop transitions, 634 changer transitions 0/714 dead transitions. [2020-10-16 03:32:52,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1026 places, 714 transitions, 44012 flow [2020-10-16 03:32:52,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-16 03:32:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 03:32:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3242 transitions. [2020-10-16 03:32:52,998 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754166666666667 [2020-10-16 03:32:52,998 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3242 transitions. [2020-10-16 03:32:52,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3242 transitions. [2020-10-16 03:32:52,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:32:52,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3242 transitions. [2020-10-16 03:32:53,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-16 03:32:53,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-16 03:32:53,002 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-16 03:32:53,002 INFO L185 Difference]: Start difference. First operand has 979 places, 662 transitions, 36610 flow. Second operand 48 states and 3242 transitions. [2020-10-16 03:32:53,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1026 places, 714 transitions, 44012 flow [2020-10-16 03:32:58,177 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 03:32:58,203 INFO L241 Difference]: Finished difference. Result has 987 places, 668 transitions, 37424 flow [2020-10-16 03:32:58,204 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 03:32:58,204 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 969 predicate places. [2020-10-16 03:32:58,204 INFO L481 AbstractCegarLoop]: Abstraction has has 987 places, 668 transitions, 37424 flow [2020-10-16 03:32:58,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 03:32:58,204 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:32:58,204 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:32:58,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 03:32:58,405 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:32:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:32:58,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1915297197, now seen corresponding path program 155 times [2020-10-16 03:32:58,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:32:58,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007679099] [2020-10-16 03:32:58,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:32:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:32:58,756 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 03:32:58,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007679099] [2020-10-16 03:32:58,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193986286] [2020-10-16 03:32:58,757 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 03:32:58,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 03:32:58,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:32:58,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:32:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:32:58,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:32:58,876 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 03:32:58,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:32:58,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 03:32:58,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15202391] [2020-10-16 03:32:58,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:32:58,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:32:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:32:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:32:58,878 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:32:58,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 987 places, 668 transitions, 37424 flow. Second operand 27 states. [2020-10-16 03:32:58,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:32:58,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:32:58,879 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:33:02,640 INFO L129 PetriNetUnfolder]: 639/1783 cut-off events. [2020-10-16 03:33:02,641 INFO L130 PetriNetUnfolder]: For 774622/774624 co-relation queries the response was YES. [2020-10-16 03:33:02,704 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 03:33:02,730 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 71 selfloop transitions, 636 changer transitions 0/714 dead transitions. [2020-10-16 03:33:02,730 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1035 places, 714 transitions, 44266 flow [2020-10-16 03:33:02,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-16 03:33:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 03:33:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3309 transitions. [2020-10-16 03:33:02,733 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753061224489796 [2020-10-16 03:33:02,734 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3309 transitions. [2020-10-16 03:33:02,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3309 transitions. [2020-10-16 03:33:02,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:33:02,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3309 transitions. [2020-10-16 03:33:02,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 50 states. [2020-10-16 03:33:02,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 50 states. [2020-10-16 03:33:02,738 INFO L81 ComplementDD]: Finished complementDD. Result 50 states. [2020-10-16 03:33:02,738 INFO L185 Difference]: Start difference. First operand has 987 places, 668 transitions, 37424 flow. Second operand 49 states and 3309 transitions. [2020-10-16 03:33:02,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1035 places, 714 transitions, 44266 flow [2020-10-16 03:33:08,782 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 03:33:08,811 INFO L241 Difference]: Finished difference. Result has 994 places, 669 transitions, 37358 flow [2020-10-16 03:33:08,812 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 03:33:08,812 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 976 predicate places. [2020-10-16 03:33:08,812 INFO L481 AbstractCegarLoop]: Abstraction has has 994 places, 669 transitions, 37358 flow [2020-10-16 03:33:08,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:33:08,812 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:33:08,812 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:33:09,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 03:33:09,013 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:33:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:33:09,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1712641855, now seen corresponding path program 156 times [2020-10-16 03:33:09,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:33:09,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682647655] [2020-10-16 03:33:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:33:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:33:09,388 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 03:33:09,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682647655] [2020-10-16 03:33:09,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596905540] [2020-10-16 03:33:09,389 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 03:33:09,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 03:33:09,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:33:09,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 03:33:09,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:33:09,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:33:09,515 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 03:33:09,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:33:09,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 03:33:09,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499077112] [2020-10-16 03:33:09,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:33:09,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:33:09,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:33:09,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:33:09,518 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:33:09,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 994 places, 669 transitions, 37358 flow. Second operand 27 states. [2020-10-16 03:33:09,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:33:09,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:33:09,518 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:33:12,924 INFO L129 PetriNetUnfolder]: 642/1789 cut-off events. [2020-10-16 03:33:12,924 INFO L130 PetriNetUnfolder]: For 791941/791943 co-relation queries the response was YES. [2020-10-16 03:33:12,990 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 03:33:13,015 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 149 selfloop transitions, 560 changer transitions 0/716 dead transitions. [2020-10-16 03:33:13,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1041 places, 716 transitions, 44350 flow [2020-10-16 03:33:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-16 03:33:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 03:33:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3241 transitions. [2020-10-16 03:33:13,018 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752083333333333 [2020-10-16 03:33:13,018 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3241 transitions. [2020-10-16 03:33:13,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3241 transitions. [2020-10-16 03:33:13,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:33:13,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3241 transitions. [2020-10-16 03:33:13,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-16 03:33:13,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-16 03:33:13,022 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-16 03:33:13,022 INFO L185 Difference]: Start difference. First operand has 994 places, 669 transitions, 37358 flow. Second operand 48 states and 3241 transitions. [2020-10-16 03:33:13,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1041 places, 716 transitions, 44350 flow [2020-10-16 03:33:19,269 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 03:33:19,297 INFO L241 Difference]: Finished difference. Result has 997 places, 672 transitions, 37604 flow [2020-10-16 03:33:19,298 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 03:33:19,298 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 979 predicate places. [2020-10-16 03:33:19,298 INFO L481 AbstractCegarLoop]: Abstraction has has 997 places, 672 transitions, 37604 flow [2020-10-16 03:33:19,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:33:19,298 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:33:19,298 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:33:19,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 03:33:19,499 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:33:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:33:19,499 INFO L82 PathProgramCache]: Analyzing trace with hash 755345344, now seen corresponding path program 157 times [2020-10-16 03:33:19,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:33:19,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065793356] [2020-10-16 03:33:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:33:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:33:19,890 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 03:33:19,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065793356] [2020-10-16 03:33:19,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84797809] [2020-10-16 03:33:19,891 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 03:33:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:33:19,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:33:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:33:19,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:33:20,013 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 03:33:20,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:33:20,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 03:33:20,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30238628] [2020-10-16 03:33:20,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:33:20,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:33:20,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:33:20,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:33:20,015 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:33:20,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 997 places, 672 transitions, 37604 flow. Second operand 28 states. [2020-10-16 03:33:20,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:33:20,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:33:20,016 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:33:23,851 INFO L129 PetriNetUnfolder]: 645/1796 cut-off events. [2020-10-16 03:33:23,851 INFO L130 PetriNetUnfolder]: For 780444/780446 co-relation queries the response was YES. [2020-10-16 03:33:23,917 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 03:33:23,942 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 74 selfloop transitions, 640 changer transitions 0/721 dead transitions. [2020-10-16 03:33:23,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1044 places, 721 transitions, 44784 flow [2020-10-16 03:33:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-16 03:33:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 03:33:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3241 transitions. [2020-10-16 03:33:23,945 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752083333333333 [2020-10-16 03:33:23,945 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3241 transitions. [2020-10-16 03:33:23,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3241 transitions. [2020-10-16 03:33:23,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:33:23,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3241 transitions. [2020-10-16 03:33:23,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-16 03:33:23,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-16 03:33:23,949 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-16 03:33:23,949 INFO L185 Difference]: Start difference. First operand has 997 places, 672 transitions, 37604 flow. Second operand 48 states and 3241 transitions. [2020-10-16 03:33:23,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1044 places, 721 transitions, 44784 flow [2020-10-16 03:33:30,120 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 03:33:30,147 INFO L241 Difference]: Finished difference. Result has 1001 places, 675 transitions, 38052 flow [2020-10-16 03:33:30,148 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 03:33:30,148 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 983 predicate places. [2020-10-16 03:33:30,148 INFO L481 AbstractCegarLoop]: Abstraction has has 1001 places, 675 transitions, 38052 flow [2020-10-16 03:33:30,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:33:30,148 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:33:30,148 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:33:30,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 03:33:30,349 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:33:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:33:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash -631771379, now seen corresponding path program 158 times [2020-10-16 03:33:30,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:33:30,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88817425] [2020-10-16 03:33:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:33:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:33:30,875 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 03:33:30,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88817425] [2020-10-16 03:33:30,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769419355] [2020-10-16 03:33:30,876 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 03:33:30,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:33:30,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:33:30,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:33:30,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:33:30,940 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 03:33:30,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:33:30,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 03:33:30,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873702218] [2020-10-16 03:33:30,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:33:30,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:33:30,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:33:30,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:33:30,942 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:33:30,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1001 places, 675 transitions, 38052 flow. Second operand 27 states. [2020-10-16 03:33:30,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:33:30,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:33:30,942 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:33:33,594 INFO L129 PetriNetUnfolder]: 647/1802 cut-off events. [2020-10-16 03:33:33,594 INFO L130 PetriNetUnfolder]: For 813510/813512 co-relation queries the response was YES. [2020-10-16 03:33:33,660 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 03:33:33,686 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 660 selfloop transitions, 35 changer transitions 0/702 dead transitions. [2020-10-16 03:33:33,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1028 places, 702 transitions, 42692 flow [2020-10-16 03:33:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 03:33:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 03:33:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1880 transitions. [2020-10-16 03:33:33,688 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6714285714285714 [2020-10-16 03:33:33,688 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1880 transitions. [2020-10-16 03:33:33,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1880 transitions. [2020-10-16 03:33:33,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:33:33,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1880 transitions. [2020-10-16 03:33:33,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-16 03:33:33,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-16 03:33:33,691 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-16 03:33:33,691 INFO L185 Difference]: Start difference. First operand has 1001 places, 675 transitions, 38052 flow. Second operand 28 states and 1880 transitions. [2020-10-16 03:33:33,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1028 places, 702 transitions, 42692 flow [2020-10-16 03:33:39,752 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 03:33:39,777 INFO L241 Difference]: Finished difference. Result has 985 places, 677 transitions, 36940 flow [2020-10-16 03:33:39,778 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 03:33:39,778 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 967 predicate places. [2020-10-16 03:33:39,778 INFO L481 AbstractCegarLoop]: Abstraction has has 985 places, 677 transitions, 36940 flow [2020-10-16 03:33:39,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:33:39,778 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:33:39,778 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:33:39,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:33:39,979 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:33:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:33:39,979 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 159 times [2020-10-16 03:33:39,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:33:39,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166607353] [2020-10-16 03:33:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:33:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:33:40,496 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 03:33:40,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166607353] [2020-10-16 03:33:40,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693709248] [2020-10-16 03:33:40,497 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 03:33:40,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 03:33:40,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:33:40,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:33:40,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:33:40,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:33:40,612 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 03:33:40,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:33:40,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 03:33:40,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894749456] [2020-10-16 03:33:40,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:33:40,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:33:40,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:33:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:33:40,615 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:33:40,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 985 places, 677 transitions, 36940 flow. Second operand 28 states. [2020-10-16 03:33:40,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:33:40,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:33:40,616 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:33:43,678 INFO L129 PetriNetUnfolder]: 653/1820 cut-off events. [2020-10-16 03:33:43,678 INFO L130 PetriNetUnfolder]: For 849892/849894 co-relation queries the response was YES. [2020-10-16 03:33:43,731 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 03:33:43,759 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 579 selfloop transitions, 124 changer transitions 0/710 dead transitions. [2020-10-16 03:33:43,759 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1015 places, 710 transitions, 42302 flow [2020-10-16 03:33:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 03:33:43,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 03:33:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2084 transitions. [2020-10-16 03:33:43,761 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.672258064516129 [2020-10-16 03:33:43,761 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2084 transitions. [2020-10-16 03:33:43,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2084 transitions. [2020-10-16 03:33:43,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:33:43,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2084 transitions. [2020-10-16 03:33:43,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 03:33:43,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 03:33:43,764 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 03:33:43,764 INFO L185 Difference]: Start difference. First operand has 985 places, 677 transitions, 36940 flow. Second operand 31 states and 2084 transitions. [2020-10-16 03:33:43,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1015 places, 710 transitions, 42302 flow [2020-10-16 03:33:49,685 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 03:33:49,710 INFO L241 Difference]: Finished difference. Result has 994 places, 683 transitions, 37626 flow [2020-10-16 03:33:49,711 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 03:33:49,711 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 976 predicate places. [2020-10-16 03:33:49,711 INFO L481 AbstractCegarLoop]: Abstraction has has 994 places, 683 transitions, 37626 flow [2020-10-16 03:33:49,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:33:49,711 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:33:49,711 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:33:49,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:33:49,912 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:33:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:33:49,912 INFO L82 PathProgramCache]: Analyzing trace with hash 857344259, now seen corresponding path program 160 times [2020-10-16 03:33:49,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:33:49,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413044153] [2020-10-16 03:33:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:33:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:33:50,362 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 03:33:50,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413044153] [2020-10-16 03:33:50,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106989056] [2020-10-16 03:33:50,363 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 03:33:50,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:33:50,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:33:50,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:33:50,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:33:50,434 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 03:33:50,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:33:50,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 03:33:50,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148245139] [2020-10-16 03:33:50,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:33:50,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:33:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:33:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:33:50,436 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:33:50,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 994 places, 683 transitions, 37626 flow. Second operand 27 states. [2020-10-16 03:33:50,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:33:50,437 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:33:50,437 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:33:53,452 INFO L129 PetriNetUnfolder]: 655/1826 cut-off events. [2020-10-16 03:33:53,452 INFO L130 PetriNetUnfolder]: For 867672/867678 co-relation queries the response was YES. [2020-10-16 03:33:53,520 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 03:33:53,547 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 377 selfloop transitions, 334 changer transitions 0/718 dead transitions. [2020-10-16 03:33:53,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1031 places, 718 transitions, 43362 flow [2020-10-16 03:33:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 03:33:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 03:33:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2559 transitions. [2020-10-16 03:33:53,549 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6734210526315789 [2020-10-16 03:33:53,549 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2559 transitions. [2020-10-16 03:33:53,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2559 transitions. [2020-10-16 03:33:53,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:33:53,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2559 transitions. [2020-10-16 03:33:53,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 39 states. [2020-10-16 03:33:53,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 39 states. [2020-10-16 03:33:53,552 INFO L81 ComplementDD]: Finished complementDD. Result 39 states. [2020-10-16 03:33:53,552 INFO L185 Difference]: Start difference. First operand has 994 places, 683 transitions, 37626 flow. Second operand 38 states and 2559 transitions. [2020-10-16 03:33:53,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1031 places, 718 transitions, 43362 flow [2020-10-16 03:33:59,793 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 03:33:59,819 INFO L241 Difference]: Finished difference. Result has 1006 places, 685 transitions, 38164 flow [2020-10-16 03:33:59,819 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 03:33:59,819 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 988 predicate places. [2020-10-16 03:33:59,820 INFO L481 AbstractCegarLoop]: Abstraction has has 1006 places, 685 transitions, 38164 flow [2020-10-16 03:33:59,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:33:59,820 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:33:59,820 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:34:00,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:34:00,020 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:34:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:34:00,021 INFO L82 PathProgramCache]: Analyzing trace with hash 99072229, now seen corresponding path program 161 times [2020-10-16 03:34:00,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:34:00,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389190340] [2020-10-16 03:34:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:34:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:34:00,463 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 03:34:00,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389190340] [2020-10-16 03:34:00,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217684482] [2020-10-16 03:34:00,463 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 03:34:00,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 03:34:00,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:34:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:34:00,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:34:00,546 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 03:34:00,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:34:00,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 03:34:00,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083899153] [2020-10-16 03:34:00,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:34:00,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:34:00,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:34:00,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:34:00,549 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:34:00,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1006 places, 685 transitions, 38164 flow. Second operand 27 states. [2020-10-16 03:34:00,550 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:34:00,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:34:00,550 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:34:03,731 INFO L129 PetriNetUnfolder]: 657/1832 cut-off events. [2020-10-16 03:34:03,732 INFO L130 PetriNetUnfolder]: For 869664/869670 co-relation queries the response was YES. [2020-10-16 03:34:03,799 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 03:34:03,826 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 319 selfloop transitions, 396 changer transitions 0/722 dead transitions. [2020-10-16 03:34:03,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1045 places, 722 transitions, 44154 flow [2020-10-16 03:34:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 03:34:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 03:34:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2695 transitions. [2020-10-16 03:34:03,829 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67375 [2020-10-16 03:34:03,829 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2695 transitions. [2020-10-16 03:34:03,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2695 transitions. [2020-10-16 03:34:03,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:34:03,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2695 transitions. [2020-10-16 03:34:03,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 03:34:03,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 03:34:03,832 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 03:34:03,832 INFO L185 Difference]: Start difference. First operand has 1006 places, 685 transitions, 38164 flow. Second operand 40 states and 2695 transitions. [2020-10-16 03:34:03,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1045 places, 722 transitions, 44154 flow [2020-10-16 03:34:10,746 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 03:34:10,773 INFO L241 Difference]: Finished difference. Result has 1013 places, 687 transitions, 38447 flow [2020-10-16 03:34:10,773 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 03:34:10,773 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 995 predicate places. [2020-10-16 03:34:10,773 INFO L481 AbstractCegarLoop]: Abstraction has has 1013 places, 687 transitions, 38447 flow [2020-10-16 03:34:10,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:34:10,774 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:34:10,774 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:34:10,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:34:10,974 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:34:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:34:10,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1631323833, now seen corresponding path program 162 times [2020-10-16 03:34:10,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:34:10,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443290523] [2020-10-16 03:34:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:34:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:34:11,403 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 03:34:11,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443290523] [2020-10-16 03:34:11,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526241821] [2020-10-16 03:34:11,404 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 03:34:11,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 03:34:11,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:34:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:34:11,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:34:11,490 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 03:34:11,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:34:11,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 03:34:11,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429722000] [2020-10-16 03:34:11,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:34:11,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:34:11,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:34:11,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:34:11,492 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:34:11,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1013 places, 687 transitions, 38447 flow. Second operand 27 states. [2020-10-16 03:34:11,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:34:11,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:34:11,493 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:34:14,752 INFO L129 PetriNetUnfolder]: 663/1850 cut-off events. [2020-10-16 03:34:14,752 INFO L130 PetriNetUnfolder]: For 877475/877481 co-relation queries the response was YES. [2020-10-16 03:34:14,820 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 03:34:14,848 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 267 selfloop transitions, 456 changer transitions 0/730 dead transitions. [2020-10-16 03:34:14,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1054 places, 730 transitions, 44993 flow [2020-10-16 03:34:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 03:34:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 03:34:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2831 transitions. [2020-10-16 03:34:14,851 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674047619047619 [2020-10-16 03:34:14,851 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2831 transitions. [2020-10-16 03:34:14,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2831 transitions. [2020-10-16 03:34:14,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:34:14,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2831 transitions. [2020-10-16 03:34:14,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-16 03:34:14,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-16 03:34:14,855 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-16 03:34:14,855 INFO L185 Difference]: Start difference. First operand has 1013 places, 687 transitions, 38447 flow. Second operand 42 states and 2831 transitions. [2020-10-16 03:34:14,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1054 places, 730 transitions, 44993 flow [2020-10-16 03:34:22,056 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 03:34:22,089 INFO L241 Difference]: Finished difference. Result has 1031 places, 693 transitions, 39497 flow [2020-10-16 03:34:22,090 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 03:34:22,090 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1013 predicate places. [2020-10-16 03:34:22,091 INFO L481 AbstractCegarLoop]: Abstraction has has 1031 places, 693 transitions, 39497 flow [2020-10-16 03:34:22,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:34:22,091 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:34:22,091 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:34:22,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:34:22,304 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:34:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:34:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash -646132309, now seen corresponding path program 163 times [2020-10-16 03:34:22,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:34:22,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831162584] [2020-10-16 03:34:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:34:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:34:22,740 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 03:34:22,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831162584] [2020-10-16 03:34:22,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684963387] [2020-10-16 03:34:22,741 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 03:34:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:34:22,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:34:22,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:34:22,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:34:22,842 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 03:34:22,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:34:22,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 03:34:22,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347442406] [2020-10-16 03:34:22,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:34:22,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:34:22,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:34:22,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:34:22,844 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:34:22,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1031 places, 693 transitions, 39497 flow. Second operand 28 states. [2020-10-16 03:34:22,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:34:22,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:34:22,845 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:34:26,372 INFO L129 PetriNetUnfolder]: 665/1856 cut-off events. [2020-10-16 03:34:26,372 INFO L130 PetriNetUnfolder]: For 881037/881039 co-relation queries the response was YES. [2020-10-16 03:34:26,442 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 03:34:26,470 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 249 selfloop transitions, 476 changer transitions 0/732 dead transitions. [2020-10-16 03:34:26,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1071 places, 732 transitions, 45753 flow [2020-10-16 03:34:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 03:34:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 03:34:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2764 transitions. [2020-10-16 03:34:26,472 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741463414634147 [2020-10-16 03:34:26,472 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2764 transitions. [2020-10-16 03:34:26,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2764 transitions. [2020-10-16 03:34:26,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:34:26,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2764 transitions. [2020-10-16 03:34:26,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-16 03:34:26,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-16 03:34:26,476 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-16 03:34:26,476 INFO L185 Difference]: Start difference. First operand has 1031 places, 693 transitions, 39497 flow. Second operand 41 states and 2764 transitions. [2020-10-16 03:34:26,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1071 places, 732 transitions, 45753 flow [2020-10-16 03:34:34,523 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 03:34:34,551 INFO L241 Difference]: Finished difference. Result has 1038 places, 695 transitions, 39898 flow [2020-10-16 03:34:34,552 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 03:34:34,552 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1020 predicate places. [2020-10-16 03:34:34,552 INFO L481 AbstractCegarLoop]: Abstraction has has 1038 places, 695 transitions, 39898 flow [2020-10-16 03:34:34,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:34:34,552 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:34:34,552 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:34:34,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:34:34,753 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:34:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:34:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash 609790859, now seen corresponding path program 164 times [2020-10-16 03:34:34,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:34:34,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574192119] [2020-10-16 03:34:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:34:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:34:35,165 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 03:34:35,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574192119] [2020-10-16 03:34:35,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414882022] [2020-10-16 03:34:35,166 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 03:34:35,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:34:35,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:34:35,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:34:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:34:35,249 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 03:34:35,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:34:35,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 03:34:35,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711113238] [2020-10-16 03:34:35,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:34:35,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:34:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:34:35,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:34:35,251 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:34:35,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1038 places, 695 transitions, 39898 flow. Second operand 27 states. [2020-10-16 03:34:35,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:34:35,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:34:35,252 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:34:38,775 INFO L129 PetriNetUnfolder]: 667/1862 cut-off events. [2020-10-16 03:34:38,775 INFO L130 PetriNetUnfolder]: For 883631/883637 co-relation queries the response was YES. [2020-10-16 03:34:38,845 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 03:34:38,873 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 185 selfloop transitions, 546 changer transitions 0/738 dead transitions. [2020-10-16 03:34:38,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1083 places, 738 transitions, 46658 flow [2020-10-16 03:34:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-16 03:34:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 03:34:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3103 transitions. [2020-10-16 03:34:38,876 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745652173913044 [2020-10-16 03:34:38,876 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3103 transitions. [2020-10-16 03:34:38,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3103 transitions. [2020-10-16 03:34:38,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:34:38,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3103 transitions. [2020-10-16 03:34:38,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-16 03:34:38,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-16 03:34:38,880 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-16 03:34:38,880 INFO L185 Difference]: Start difference. First operand has 1038 places, 695 transitions, 39898 flow. Second operand 46 states and 3103 transitions. [2020-10-16 03:34:38,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1083 places, 738 transitions, 46658 flow [2020-10-16 03:34:46,174 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 03:34:46,202 INFO L241 Difference]: Finished difference. Result has 1047 places, 697 transitions, 40251 flow [2020-10-16 03:34:46,202 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 03:34:46,202 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1029 predicate places. [2020-10-16 03:34:46,202 INFO L481 AbstractCegarLoop]: Abstraction has has 1047 places, 697 transitions, 40251 flow [2020-10-16 03:34:46,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:34:46,203 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:34:46,203 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:34:46,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:34:46,403 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:34:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:34:46,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1064717521, now seen corresponding path program 165 times [2020-10-16 03:34:46,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:34:46,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296387103] [2020-10-16 03:34:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:34:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:34:46,809 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 03:34:46,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296387103] [2020-10-16 03:34:46,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989913080] [2020-10-16 03:34:46,810 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 03:34:46,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 03:34:46,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:34:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:34:46,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:34:46,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:34:46,926 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 03:34:46,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:34:46,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 03:34:46,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431160635] [2020-10-16 03:34:46,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:34:46,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:34:46,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:34:46,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:34:46,928 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:34:46,929 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1047 places, 697 transitions, 40251 flow. Second operand 28 states. [2020-10-16 03:34:46,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:34:46,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:34:46,929 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:34:50,920 INFO L129 PetriNetUnfolder]: 671/1874 cut-off events. [2020-10-16 03:34:50,920 INFO L130 PetriNetUnfolder]: For 888648/888654 co-relation queries the response was YES. [2020-10-16 03:34:50,991 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 03:34:51,019 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 149 selfloop transitions, 588 changer transitions 0/744 dead transitions. [2020-10-16 03:34:51,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1093 places, 744 transitions, 47355 flow [2020-10-16 03:34:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 03:34:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 03:34:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3172 transitions. [2020-10-16 03:34:51,022 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6748936170212766 [2020-10-16 03:34:51,022 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3172 transitions. [2020-10-16 03:34:51,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3172 transitions. [2020-10-16 03:34:51,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:34:51,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3172 transitions. [2020-10-16 03:34:51,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-16 03:34:51,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-16 03:34:51,027 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-16 03:34:51,027 INFO L185 Difference]: Start difference. First operand has 1047 places, 697 transitions, 40251 flow. Second operand 47 states and 3172 transitions. [2020-10-16 03:34:51,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1093 places, 744 transitions, 47355 flow [2020-10-16 03:34:58,221 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 03:34:58,249 INFO L241 Difference]: Finished difference. Result has 1054 places, 701 transitions, 40730 flow [2020-10-16 03:34:58,249 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 03:34:58,249 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1036 predicate places. [2020-10-16 03:34:58,250 INFO L481 AbstractCegarLoop]: Abstraction has has 1054 places, 701 transitions, 40730 flow [2020-10-16 03:34:58,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:34:58,250 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:34:58,250 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:34:58,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 03:34:58,451 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:34:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:34:58,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1551800371, now seen corresponding path program 166 times [2020-10-16 03:34:58,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:34:58,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8462470] [2020-10-16 03:34:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:34:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:34:58,855 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 03:34:58,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8462470] [2020-10-16 03:34:58,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908244943] [2020-10-16 03:34:58,856 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 03:34:58,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:34:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:34:58,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:34:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:34:58,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:34:58,968 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 03:34:58,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:34:58,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 03:34:58,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271155819] [2020-10-16 03:34:58,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:34:58,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:34:58,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:34:58,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:34:58,971 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:34:58,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1054 places, 701 transitions, 40730 flow. Second operand 28 states. [2020-10-16 03:34:58,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:34:58,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:34:58,972 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:35:02,956 INFO L129 PetriNetUnfolder]: 673/1880 cut-off events. [2020-10-16 03:35:02,956 INFO L130 PetriNetUnfolder]: For 891019/891025 co-relation queries the response was YES. [2020-10-16 03:35:03,027 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 03:35:03,056 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 129 selfloop transitions, 612 changer transitions 0/748 dead transitions. [2020-10-16 03:35:03,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1102 places, 748 transitions, 48002 flow [2020-10-16 03:35:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-16 03:35:03,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 03:35:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3308 transitions. [2020-10-16 03:35:03,058 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6751020408163265 [2020-10-16 03:35:03,059 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3308 transitions. [2020-10-16 03:35:03,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3308 transitions. [2020-10-16 03:35:03,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:35:03,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3308 transitions. [2020-10-16 03:35:03,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 50 states. [2020-10-16 03:35:03,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 50 states. [2020-10-16 03:35:03,062 INFO L81 ComplementDD]: Finished complementDD. Result 50 states. [2020-10-16 03:35:03,062 INFO L185 Difference]: Start difference. First operand has 1054 places, 701 transitions, 40730 flow. Second operand 49 states and 3308 transitions. [2020-10-16 03:35:03,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1102 places, 748 transitions, 48002 flow [2020-10-16 03:35:10,675 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 03:35:10,703 INFO L241 Difference]: Finished difference. Result has 1059 places, 703 transitions, 40990 flow [2020-10-16 03:35:10,703 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 03:35:10,704 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1041 predicate places. [2020-10-16 03:35:10,704 INFO L481 AbstractCegarLoop]: Abstraction has has 1059 places, 703 transitions, 40990 flow [2020-10-16 03:35:10,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:35:10,704 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:35:10,704 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:35:10,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 03:35:10,905 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:35:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:35:10,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1552290481, now seen corresponding path program 167 times [2020-10-16 03:35:10,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:35:10,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928878301] [2020-10-16 03:35:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:35:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:35:11,312 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 03:35:11,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928878301] [2020-10-16 03:35:11,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141662352] [2020-10-16 03:35:11,313 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 03:35:11,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 03:35:11,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:35:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:35:11,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:35:11,404 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 03:35:11,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:35:11,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-16 03:35:11,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262856314] [2020-10-16 03:35:11,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 03:35:11,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:35:11,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 03:35:11,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-16 03:35:11,407 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:35:11,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1059 places, 703 transitions, 40990 flow. Second operand 27 states. [2020-10-16 03:35:11,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:35:11,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:35:11,408 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:35:15,235 INFO L129 PetriNetUnfolder]: 682/1901 cut-off events. [2020-10-16 03:35:15,235 INFO L130 PetriNetUnfolder]: For 904495/904497 co-relation queries the response was YES. [2020-10-16 03:35:15,317 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 03:35:15,346 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 120 selfloop transitions, 630 changer transitions 0/757 dead transitions. [2020-10-16 03:35:15,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1110 places, 757 transitions, 49102 flow [2020-10-16 03:35:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-16 03:35:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 03:35:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3512 transitions. [2020-10-16 03:35:15,349 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753846153846154 [2020-10-16 03:35:15,350 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3512 transitions. [2020-10-16 03:35:15,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3512 transitions. [2020-10-16 03:35:15,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:35:15,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3512 transitions. [2020-10-16 03:35:15,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 53 states. [2020-10-16 03:35:15,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 53 states. [2020-10-16 03:35:15,354 INFO L81 ComplementDD]: Finished complementDD. Result 53 states. [2020-10-16 03:35:15,354 INFO L185 Difference]: Start difference. First operand has 1059 places, 703 transitions, 40990 flow. Second operand 52 states and 3512 transitions. [2020-10-16 03:35:15,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1110 places, 757 transitions, 49102 flow [2020-10-16 03:35:23,428 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 03:35:23,456 INFO L241 Difference]: Finished difference. Result has 1068 places, 709 transitions, 41788 flow [2020-10-16 03:35:23,457 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 03:35:23,457 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1050 predicate places. [2020-10-16 03:35:23,457 INFO L481 AbstractCegarLoop]: Abstraction has has 1068 places, 709 transitions, 41788 flow [2020-10-16 03:35:23,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 03:35:23,457 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:35:23,458 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:35:23,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 03:35:23,658 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:35:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:35:23,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1552307221, now seen corresponding path program 168 times [2020-10-16 03:35:23,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:35:23,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104858240] [2020-10-16 03:35:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:35:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:35:24,051 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 03:35:24,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104858240] [2020-10-16 03:35:24,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659758755] [2020-10-16 03:35:24,052 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 03:35:24,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 03:35:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:35:24,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 03:35:24,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:35:24,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:35:24,168 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 03:35:24,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:35:24,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 03:35:24,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091198287] [2020-10-16 03:35:24,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:35:24,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:35:24,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:35:24,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:35:24,170 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:35:24,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1068 places, 709 transitions, 41788 flow. Second operand 28 states. [2020-10-16 03:35:24,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:35:24,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:35:24,171 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:35:28,399 INFO L129 PetriNetUnfolder]: 679/1895 cut-off events. [2020-10-16 03:35:28,399 INFO L130 PetriNetUnfolder]: For 946862/946868 co-relation queries the response was YES. [2020-10-16 03:35:28,472 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 03:35:28,501 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 120 selfloop transitions, 630 changer transitions 0/757 dead transitions. [2020-10-16 03:35:28,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1118 places, 757 transitions, 49352 flow [2020-10-16 03:35:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-16 03:35:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 03:35:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3444 transitions. [2020-10-16 03:35:28,506 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752941176470588 [2020-10-16 03:35:28,506 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3444 transitions. [2020-10-16 03:35:28,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3444 transitions. [2020-10-16 03:35:28,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:35:28,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3444 transitions. [2020-10-16 03:35:28,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 52 states. [2020-10-16 03:35:28,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 52 states. [2020-10-16 03:35:28,513 INFO L81 ComplementDD]: Finished complementDD. Result 52 states. [2020-10-16 03:35:28,513 INFO L185 Difference]: Start difference. First operand has 1068 places, 709 transitions, 41788 flow. Second operand 51 states and 3444 transitions. [2020-10-16 03:35:28,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1118 places, 757 transitions, 49352 flow [2020-10-16 03:35:35,250 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 03:35:35,279 INFO L241 Difference]: Finished difference. Result has 1073 places, 710 transitions, 41586 flow [2020-10-16 03:35:35,279 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 03:35:35,280 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1055 predicate places. [2020-10-16 03:35:35,280 INFO L481 AbstractCegarLoop]: Abstraction has has 1073 places, 710 transitions, 41586 flow [2020-10-16 03:35:35,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:35:35,280 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:35:35,280 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:35:35,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 03:35:35,481 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:35:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:35:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1494502320, now seen corresponding path program 169 times [2020-10-16 03:35:35,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:35:35,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319358282] [2020-10-16 03:35:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:35:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:35:36,066 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 03:35:36,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319358282] [2020-10-16 03:35:36,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780935460] [2020-10-16 03:35:36,066 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 03:35:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:35:36,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:35:36,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:35:36,133 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 03:35:36,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:35:36,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 03:35:36,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102318138] [2020-10-16 03:35:36,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:35:36,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:35:36,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:35:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:35:36,135 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:35:36,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1073 places, 710 transitions, 41586 flow. Second operand 28 states. [2020-10-16 03:35:36,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:35:36,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:35:36,137 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:35:39,185 INFO L129 PetriNetUnfolder]: 681/1901 cut-off events. [2020-10-16 03:35:39,185 INFO L130 PetriNetUnfolder]: For 965158/965160 co-relation queries the response was YES. [2020-10-16 03:35:39,258 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 03:35:39,287 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 646 selfloop transitions, 86 changer transitions 0/739 dead transitions. [2020-10-16 03:35:39,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1102 places, 739 transitions, 46724 flow [2020-10-16 03:35:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 03:35:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-16 03:35:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2015 transitions. [2020-10-16 03:35:39,290 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6716666666666666 [2020-10-16 03:35:39,290 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2015 transitions. [2020-10-16 03:35:39,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2015 transitions. [2020-10-16 03:35:39,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:35:39,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2015 transitions. [2020-10-16 03:35:39,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-16 03:35:39,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-16 03:35:39,292 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-16 03:35:39,292 INFO L185 Difference]: Start difference. First operand has 1073 places, 710 transitions, 41586 flow. Second operand 30 states and 2015 transitions. [2020-10-16 03:35:39,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1102 places, 739 transitions, 46724 flow [2020-10-16 03:35:46,294 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 03:35:46,322 INFO L241 Difference]: Finished difference. Result has 1056 places, 712 transitions, 40712 flow [2020-10-16 03:35:46,322 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 03:35:46,322 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1038 predicate places. [2020-10-16 03:35:46,323 INFO L481 AbstractCegarLoop]: Abstraction has has 1056 places, 712 transitions, 40712 flow [2020-10-16 03:35:46,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:35:46,323 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:35:46,323 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:35:46,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:35:46,524 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:35:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:35:46,524 INFO L82 PathProgramCache]: Analyzing trace with hash -139129730, now seen corresponding path program 170 times [2020-10-16 03:35:46,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:35:46,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935119431] [2020-10-16 03:35:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:35:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:35:47,120 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 03:35:47,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935119431] [2020-10-16 03:35:47,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861186841] [2020-10-16 03:35:47,121 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 03:35:47,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:35:47,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:35:47,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:35:47,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:35:47,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:35:47,243 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 03:35:47,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:35:47,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 03:35:47,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945181004] [2020-10-16 03:35:47,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 03:35:47,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:35:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 03:35:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-16 03:35:47,246 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:35:47,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1056 places, 712 transitions, 40712 flow. Second operand 29 states. [2020-10-16 03:35:47,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:35:47,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:35:47,247 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:35:50,301 INFO L129 PetriNetUnfolder]: 685/1913 cut-off events. [2020-10-16 03:35:50,301 INFO L130 PetriNetUnfolder]: For 956197/956203 co-relation queries the response was YES. [2020-10-16 03:35:50,375 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 03:35:50,404 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 604 selfloop transitions, 132 changer transitions 0/743 dead transitions. [2020-10-16 03:35:50,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1086 places, 743 transitions, 45945 flow [2020-10-16 03:35:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 03:35:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 03:35:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2083 transitions. [2020-10-16 03:35:50,406 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6719354838709677 [2020-10-16 03:35:50,406 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2083 transitions. [2020-10-16 03:35:50,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2083 transitions. [2020-10-16 03:35:50,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:35:50,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2083 transitions. [2020-10-16 03:35:50,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 03:35:50,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 03:35:50,410 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 03:35:50,410 INFO L185 Difference]: Start difference. First operand has 1056 places, 712 transitions, 40712 flow. Second operand 31 states and 2083 transitions. [2020-10-16 03:35:50,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1086 places, 743 transitions, 45945 flow [2020-10-16 03:35:58,028 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 03:35:58,055 INFO L241 Difference]: Finished difference. Result has 1061 places, 716 transitions, 41007 flow [2020-10-16 03:35:58,056 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 03:35:58,056 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1043 predicate places. [2020-10-16 03:35:58,056 INFO L481 AbstractCegarLoop]: Abstraction has has 1061 places, 716 transitions, 41007 flow [2020-10-16 03:35:58,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 03:35:58,056 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:35:58,056 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:35:58,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:35:58,257 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:35:58,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:35:58,258 INFO L82 PathProgramCache]: Analyzing trace with hash 151282226, now seen corresponding path program 171 times [2020-10-16 03:35:58,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:35:58,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894636633] [2020-10-16 03:35:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:35:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:35:58,819 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 03:35:58,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894636633] [2020-10-16 03:35:58,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998273229] [2020-10-16 03:35:58,820 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 03:35:58,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 03:35:58,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:35:58,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:35:58,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:35:58,898 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 03:35:58,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:35:58,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 03:35:58,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438159588] [2020-10-16 03:35:58,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:35:58,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:35:58,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:35:58,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:35:58,901 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:35:58,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 716 transitions, 41007 flow. Second operand 28 states. [2020-10-16 03:35:58,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:35:58,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:35:58,902 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:36:02,248 INFO L129 PetriNetUnfolder]: 689/1925 cut-off events. [2020-10-16 03:36:02,248 INFO L130 PetriNetUnfolder]: For 979648/979654 co-relation queries the response was YES. [2020-10-16 03:36:02,311 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 03:36:02,341 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 554 selfloop transitions, 188 changer transitions 0/749 dead transitions. [2020-10-16 03:36:02,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1092 places, 749 transitions, 46540 flow [2020-10-16 03:36:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 03:36:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 03:36:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2151 transitions. [2020-10-16 03:36:02,344 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6721875 [2020-10-16 03:36:02,344 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2151 transitions. [2020-10-16 03:36:02,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2151 transitions. [2020-10-16 03:36:02,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:36:02,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2151 transitions. [2020-10-16 03:36:02,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 03:36:02,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 03:36:02,347 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 03:36:02,347 INFO L185 Difference]: Start difference. First operand has 1061 places, 716 transitions, 41007 flow. Second operand 32 states and 2151 transitions. [2020-10-16 03:36:02,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1092 places, 749 transitions, 46540 flow [2020-10-16 03:36:09,556 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 03:36:09,585 INFO L241 Difference]: Finished difference. Result has 1066 places, 720 transitions, 41330 flow [2020-10-16 03:36:09,586 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 03:36:09,586 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1048 predicate places. [2020-10-16 03:36:09,586 INFO L481 AbstractCegarLoop]: Abstraction has has 1066 places, 720 transitions, 41330 flow [2020-10-16 03:36:09,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:36:09,586 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:36:09,587 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:36:09,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-16 03:36:09,801 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:36:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:36:09,802 INFO L82 PathProgramCache]: Analyzing trace with hash -887486058, now seen corresponding path program 172 times [2020-10-16 03:36:09,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:36:09,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723973527] [2020-10-16 03:36:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:36:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:36:10,372 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 03:36:10,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723973527] [2020-10-16 03:36:10,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754030024] [2020-10-16 03:36:10,372 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 03:36:10,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:36:10,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:36:10,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:36:10,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:36:10,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:36:10,474 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 03:36:10,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:36:10,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 03:36:10,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021335176] [2020-10-16 03:36:10,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 03:36:10,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:36:10,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 03:36:10,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-10-16 03:36:10,477 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:36:10,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1066 places, 720 transitions, 41330 flow. Second operand 29 states. [2020-10-16 03:36:10,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:36:10,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:36:10,478 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:36:13,758 INFO L129 PetriNetUnfolder]: 691/1931 cut-off events. [2020-10-16 03:36:13,758 INFO L130 PetriNetUnfolder]: For 982033/982039 co-relation queries the response was YES. [2020-10-16 03:36:13,846 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 03:36:13,875 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 514 selfloop transitions, 230 changer transitions 0/751 dead transitions. [2020-10-16 03:36:13,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1098 places, 751 transitions, 46748 flow [2020-10-16 03:36:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 03:36:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-16 03:36:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2219 transitions. [2020-10-16 03:36:13,878 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6724242424242424 [2020-10-16 03:36:13,878 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2219 transitions. [2020-10-16 03:36:13,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2219 transitions. [2020-10-16 03:36:13,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:36:13,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2219 transitions. [2020-10-16 03:36:13,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-16 03:36:13,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-16 03:36:13,881 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-16 03:36:13,881 INFO L185 Difference]: Start difference. First operand has 1066 places, 720 transitions, 41330 flow. Second operand 33 states and 2219 transitions. [2020-10-16 03:36:13,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1098 places, 751 transitions, 46748 flow [2020-10-16 03:36:21,799 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 03:36:21,829 INFO L241 Difference]: Finished difference. Result has 1071 places, 722 transitions, 41522 flow [2020-10-16 03:36:21,829 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 03:36:21,830 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1053 predicate places. [2020-10-16 03:36:21,830 INFO L481 AbstractCegarLoop]: Abstraction has has 1071 places, 722 transitions, 41522 flow [2020-10-16 03:36:21,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 03:36:21,830 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:36:21,830 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:36:22,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:36:22,031 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:36:22,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:36:22,031 INFO L82 PathProgramCache]: Analyzing trace with hash -472702828, now seen corresponding path program 173 times [2020-10-16 03:36:22,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:36:22,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719920389] [2020-10-16 03:36:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:36:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:36:22,575 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 03:36:22,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719920389] [2020-10-16 03:36:22,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846149732] [2020-10-16 03:36:22,576 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 03:36:22,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 03:36:22,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:36:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:36:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:36:22,652 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 03:36:22,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:36:22,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 03:36:22,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359274058] [2020-10-16 03:36:22,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:36:22,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:36:22,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:36:22,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:36:22,654 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:36:22,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1071 places, 722 transitions, 41522 flow. Second operand 28 states. [2020-10-16 03:36:22,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:36:22,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:36:22,655 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:36:25,859 INFO L129 PetriNetUnfolder]: 695/1943 cut-off events. [2020-10-16 03:36:25,860 INFO L130 PetriNetUnfolder]: For 987132/987134 co-relation queries the response was YES. [2020-10-16 03:36:25,934 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 03:36:25,967 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 468 selfloop transitions, 282 changer transitions 0/757 dead transitions. [2020-10-16 03:36:25,967 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1104 places, 757 transitions, 47315 flow [2020-10-16 03:36:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 03:36:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 03:36:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2287 transitions. [2020-10-16 03:36:25,969 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6726470588235294 [2020-10-16 03:36:25,969 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2287 transitions. [2020-10-16 03:36:25,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2287 transitions. [2020-10-16 03:36:25,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:36:25,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2287 transitions. [2020-10-16 03:36:25,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-16 03:36:25,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-16 03:36:25,972 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-16 03:36:25,972 INFO L185 Difference]: Start difference. First operand has 1071 places, 722 transitions, 41522 flow. Second operand 34 states and 2287 transitions. [2020-10-16 03:36:25,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1104 places, 757 transitions, 47315 flow [2020-10-16 03:36:34,262 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 03:36:34,295 INFO L241 Difference]: Finished difference. Result has 1076 places, 726 transitions, 41867 flow [2020-10-16 03:36:34,296 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 03:36:34,296 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1058 predicate places. [2020-10-16 03:36:34,296 INFO L481 AbstractCegarLoop]: Abstraction has has 1076 places, 726 transitions, 41867 flow [2020-10-16 03:36:34,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:36:34,296 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:36:34,297 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:36:34,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:36:34,497 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:36:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:36:34,498 INFO L82 PathProgramCache]: Analyzing trace with hash -199096000, now seen corresponding path program 174 times [2020-10-16 03:36:34,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:36:34,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830198823] [2020-10-16 03:36:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:36:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:36:35,010 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 03:36:35,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830198823] [2020-10-16 03:36:35,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987635298] [2020-10-16 03:36:35,011 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 03:36:35,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 03:36:35,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:36:35,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:36:35,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:36:35,091 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 03:36:35,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:36:35,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 03:36:35,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862673316] [2020-10-16 03:36:35,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:36:35,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:36:35,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:36:35,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:36:35,093 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:36:35,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1076 places, 726 transitions, 41867 flow. Second operand 28 states. [2020-10-16 03:36:35,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:36:35,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:36:35,094 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:36:38,480 INFO L129 PetriNetUnfolder]: 699/1955 cut-off events. [2020-10-16 03:36:38,480 INFO L130 PetriNetUnfolder]: For 992220/992222 co-relation queries the response was YES. [2020-10-16 03:36:38,558 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 03:36:38,587 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 400 selfloop transitions, 356 changer transitions 0/763 dead transitions. [2020-10-16 03:36:38,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1111 places, 763 transitions, 47930 flow [2020-10-16 03:36:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 03:36:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 03:36:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2423 transitions. [2020-10-16 03:36:38,590 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6730555555555555 [2020-10-16 03:36:38,590 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2423 transitions. [2020-10-16 03:36:38,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2423 transitions. [2020-10-16 03:36:38,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:36:38,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2423 transitions. [2020-10-16 03:36:38,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 03:36:38,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 03:36:38,593 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 03:36:38,593 INFO L185 Difference]: Start difference. First operand has 1076 places, 726 transitions, 41867 flow. Second operand 36 states and 2423 transitions. [2020-10-16 03:36:38,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1111 places, 763 transitions, 47930 flow [2020-10-16 03:36:46,282 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 03:36:46,311 INFO L241 Difference]: Finished difference. Result has 1082 places, 730 transitions, 42277 flow [2020-10-16 03:36:46,311 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 03:36:46,311 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1064 predicate places. [2020-10-16 03:36:46,311 INFO L481 AbstractCegarLoop]: Abstraction has has 1082 places, 730 transitions, 42277 flow [2020-10-16 03:36:46,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:36:46,312 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:36:46,312 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:36:46,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:36:46,512 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:36:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:36:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1747254620, now seen corresponding path program 175 times [2020-10-16 03:36:46,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:36:46,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471056792] [2020-10-16 03:36:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:36:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:36:47,050 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 03:36:47,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471056792] [2020-10-16 03:36:47,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037147339] [2020-10-16 03:36:47,051 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 03:36:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:36:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:36:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:36:47,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:36:47,161 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 03:36:47,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:36:47,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 03:36:47,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165635019] [2020-10-16 03:36:47,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 03:36:47,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:36:47,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 03:36:47,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-16 03:36:47,163 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:36:47,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1082 places, 730 transitions, 42277 flow. Second operand 29 states. [2020-10-16 03:36:47,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:36:47,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:36:47,164 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:36:50,550 INFO L129 PetriNetUnfolder]: 703/1967 cut-off events. [2020-10-16 03:36:50,551 INFO L130 PetriNetUnfolder]: For 997317/997323 co-relation queries the response was YES. [2020-10-16 03:36:50,629 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 03:36:50,659 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 370 selfloop transitions, 390 changer transitions 0/767 dead transitions. [2020-10-16 03:36:50,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1118 places, 767 transitions, 48352 flow [2020-10-16 03:36:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 03:36:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 03:36:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2491 transitions. [2020-10-16 03:36:50,662 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6732432432432433 [2020-10-16 03:36:50,662 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2491 transitions. [2020-10-16 03:36:50,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2491 transitions. [2020-10-16 03:36:50,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:36:50,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2491 transitions. [2020-10-16 03:36:50,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-16 03:36:50,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-16 03:36:50,665 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-16 03:36:50,665 INFO L185 Difference]: Start difference. First operand has 1082 places, 730 transitions, 42277 flow. Second operand 37 states and 2491 transitions. [2020-10-16 03:36:50,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1118 places, 767 transitions, 48352 flow [2020-10-16 03:36:57,928 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 03:36:57,957 INFO L241 Difference]: Finished difference. Result has 1088 places, 734 transitions, 42648 flow [2020-10-16 03:36:57,958 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 03:36:57,958 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1070 predicate places. [2020-10-16 03:36:57,958 INFO L481 AbstractCegarLoop]: Abstraction has has 1088 places, 734 transitions, 42648 flow [2020-10-16 03:36:57,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 03:36:57,958 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:36:57,959 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:36:58,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:36:58,159 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:36:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:36:58,160 INFO L82 PathProgramCache]: Analyzing trace with hash 435374854, now seen corresponding path program 176 times [2020-10-16 03:36:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:36:58,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862993477] [2020-10-16 03:36:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:36:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:36:58,661 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 03:36:58,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862993477] [2020-10-16 03:36:58,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465493584] [2020-10-16 03:36:58,662 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 03:36:58,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:36:58,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:36:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:36:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:36:58,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:36:58,768 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 03:36:58,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:36:58,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 03:36:58,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919015114] [2020-10-16 03:36:58,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 03:36:58,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:36:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 03:36:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-10-16 03:36:58,770 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:36:58,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1088 places, 734 transitions, 42648 flow. Second operand 29 states. [2020-10-16 03:36:58,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:36:58,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:36:58,771 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:37:02,605 INFO L129 PetriNetUnfolder]: 707/1979 cut-off events. [2020-10-16 03:37:02,605 INFO L130 PetriNetUnfolder]: For 1002572/1002574 co-relation queries the response was YES. [2020-10-16 03:37:02,684 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 03:37:02,714 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 306 selfloop transitions, 460 changer transitions 0/773 dead transitions. [2020-10-16 03:37:02,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1126 places, 773 transitions, 48975 flow [2020-10-16 03:37:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 03:37:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 03:37:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2627 transitions. [2020-10-16 03:37:02,717 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6735897435897436 [2020-10-16 03:37:02,717 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2627 transitions. [2020-10-16 03:37:02,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2627 transitions. [2020-10-16 03:37:02,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:37:02,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2627 transitions. [2020-10-16 03:37:02,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-16 03:37:02,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-16 03:37:02,720 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-16 03:37:02,720 INFO L185 Difference]: Start difference. First operand has 1088 places, 734 transitions, 42648 flow. Second operand 39 states and 2627 transitions. [2020-10-16 03:37:02,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1126 places, 773 transitions, 48975 flow [2020-10-16 03:37:10,674 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 03:37:10,704 INFO L241 Difference]: Finished difference. Result has 1098 places, 738 transitions, 43202 flow [2020-10-16 03:37:10,704 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 03:37:10,705 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1080 predicate places. [2020-10-16 03:37:10,705 INFO L481 AbstractCegarLoop]: Abstraction has has 1098 places, 738 transitions, 43202 flow [2020-10-16 03:37:10,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 03:37:10,705 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:37:10,705 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:37:10,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:37:10,906 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:37:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:37:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash 487651460, now seen corresponding path program 177 times [2020-10-16 03:37:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:37:10,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938150772] [2020-10-16 03:37:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:37:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:37:11,403 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 03:37:11,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938150772] [2020-10-16 03:37:11,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830256858] [2020-10-16 03:37:11,404 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 03:37:11,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 03:37:11,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:37:11,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:37:11,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:37:11,492 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 03:37:11,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:37:11,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 03:37:11,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702566201] [2020-10-16 03:37:11,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:37:11,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:37:11,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:37:11,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:37:11,495 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:37:11,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1098 places, 738 transitions, 43202 flow. Second operand 28 states. [2020-10-16 03:37:11,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:37:11,496 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:37:11,496 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:37:14,855 INFO L129 PetriNetUnfolder]: 709/1985 cut-off events. [2020-10-16 03:37:14,855 INFO L130 PetriNetUnfolder]: For 1005311/1005313 co-relation queries the response was YES. [2020-10-16 03:37:14,935 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 03:37:14,965 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 270 selfloop transitions, 500 changer transitions 0/777 dead transitions. [2020-10-16 03:37:14,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1137 places, 777 transitions, 49688 flow [2020-10-16 03:37:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 03:37:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 03:37:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2695 transitions. [2020-10-16 03:37:14,969 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67375 [2020-10-16 03:37:14,969 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2695 transitions. [2020-10-16 03:37:14,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2695 transitions. [2020-10-16 03:37:14,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:37:14,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2695 transitions. [2020-10-16 03:37:14,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-16 03:37:14,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-16 03:37:14,972 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-16 03:37:14,972 INFO L185 Difference]: Start difference. First operand has 1098 places, 738 transitions, 43202 flow. Second operand 40 states and 2695 transitions. [2020-10-16 03:37:14,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1137 places, 777 transitions, 49688 flow [2020-10-16 03:37:22,750 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 03:37:22,780 INFO L241 Difference]: Finished difference. Result has 1101 places, 740 transitions, 43418 flow [2020-10-16 03:37:22,781 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 03:37:22,781 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1083 predicate places. [2020-10-16 03:37:22,781 INFO L481 AbstractCegarLoop]: Abstraction has has 1101 places, 740 transitions, 43418 flow [2020-10-16 03:37:22,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:37:22,781 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:37:22,781 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:37:22,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-16 03:37:22,982 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:37:22,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:37:22,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1931066392, now seen corresponding path program 178 times [2020-10-16 03:37:22,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:37:22,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111435445] [2020-10-16 03:37:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:37:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:37:23,480 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 03:37:23,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111435445] [2020-10-16 03:37:23,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083473114] [2020-10-16 03:37:23,481 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 03:37:23,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:37:23,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:37:23,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:37:23,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:37:23,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:37:23,595 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 03:37:23,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:37:23,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 03:37:23,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754392539] [2020-10-16 03:37:23,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 03:37:23,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:37:23,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 03:37:23,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-16 03:37:23,597 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:37:23,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1101 places, 740 transitions, 43418 flow. Second operand 29 states. [2020-10-16 03:37:23,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:37:23,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:37:23,598 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:37:27,591 INFO L129 PetriNetUnfolder]: 713/1997 cut-off events. [2020-10-16 03:37:27,591 INFO L130 PetriNetUnfolder]: For 1010704/1010710 co-relation queries the response was YES. [2020-10-16 03:37:27,672 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 03:37:27,702 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 248 selfloop transitions, 526 changer transitions 0/781 dead transitions. [2020-10-16 03:37:27,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1141 places, 781 transitions, 50009 flow [2020-10-16 03:37:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 03:37:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 03:37:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2763 transitions. [2020-10-16 03:37:27,705 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6739024390243903 [2020-10-16 03:37:27,705 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2763 transitions. [2020-10-16 03:37:27,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2763 transitions. [2020-10-16 03:37:27,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:37:27,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2763 transitions. [2020-10-16 03:37:27,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-16 03:37:27,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-16 03:37:27,708 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-16 03:37:27,708 INFO L185 Difference]: Start difference. First operand has 1101 places, 740 transitions, 43418 flow. Second operand 41 states and 2763 transitions. [2020-10-16 03:37:27,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1141 places, 781 transitions, 50009 flow [2020-10-16 03:37:35,572 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 03:37:35,602 INFO L241 Difference]: Finished difference. Result has 1108 places, 744 transitions, 43875 flow [2020-10-16 03:37:35,602 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 03:37:35,603 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1090 predicate places. [2020-10-16 03:37:35,603 INFO L481 AbstractCegarLoop]: Abstraction has has 1108 places, 744 transitions, 43875 flow [2020-10-16 03:37:35,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 03:37:35,603 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:37:35,603 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:37:35,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 03:37:35,804 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:37:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:37:35,804 INFO L82 PathProgramCache]: Analyzing trace with hash -127058148, now seen corresponding path program 179 times [2020-10-16 03:37:35,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:37:35,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796389440] [2020-10-16 03:37:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:37:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:37:36,282 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 03:37:36,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796389440] [2020-10-16 03:37:36,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687350081] [2020-10-16 03:37:36,283 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 03:37:36,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 03:37:36,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:37:36,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:37:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:37:36,372 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 03:37:36,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:37:36,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 03:37:36,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659154101] [2020-10-16 03:37:36,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:37:36,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:37:36,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:37:36,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:37:36,375 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:37:36,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1108 places, 744 transitions, 43875 flow. Second operand 28 states. [2020-10-16 03:37:36,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:37:36,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:37:36,376 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:37:40,198 INFO L129 PetriNetUnfolder]: 715/2003 cut-off events. [2020-10-16 03:37:40,198 INFO L130 PetriNetUnfolder]: For 1013591/1013597 co-relation queries the response was YES. [2020-10-16 03:37:40,279 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 03:37:40,310 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 216 selfloop transitions, 562 changer transitions 0/785 dead transitions. [2020-10-16 03:37:40,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1149 places, 785 transitions, 50631 flow [2020-10-16 03:37:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 03:37:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 03:37:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2831 transitions. [2020-10-16 03:37:40,314 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674047619047619 [2020-10-16 03:37:40,315 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2831 transitions. [2020-10-16 03:37:40,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2831 transitions. [2020-10-16 03:37:40,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:37:40,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2831 transitions. [2020-10-16 03:37:40,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-16 03:37:40,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-16 03:37:40,320 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-16 03:37:40,320 INFO L185 Difference]: Start difference. First operand has 1108 places, 744 transitions, 43875 flow. Second operand 42 states and 2831 transitions. [2020-10-16 03:37:40,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1149 places, 785 transitions, 50631 flow [2020-10-16 03:37:48,822 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 03:37:48,852 INFO L241 Difference]: Finished difference. Result has 1115 places, 746 transitions, 44275 flow [2020-10-16 03:37:48,853 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 03:37:48,853 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1097 predicate places. [2020-10-16 03:37:48,853 INFO L481 AbstractCegarLoop]: Abstraction has has 1115 places, 746 transitions, 44275 flow [2020-10-16 03:37:48,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:37:48,853 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:37:48,853 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:37:49,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:37:49,054 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:37:49,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:37:49,054 INFO L82 PathProgramCache]: Analyzing trace with hash 858133376, now seen corresponding path program 180 times [2020-10-16 03:37:49,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:37:49,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960559370] [2020-10-16 03:37:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:37:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:37:49,545 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 03:37:49,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960559370] [2020-10-16 03:37:49,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270952468] [2020-10-16 03:37:49,546 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 03:37:49,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 03:37:49,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:37:49,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:37:49,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:37:49,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:37:49,664 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 03:37:49,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:37:49,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 03:37:49,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665127027] [2020-10-16 03:37:49,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 03:37:49,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:37:49,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 03:37:49,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-10-16 03:37:49,666 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:37:49,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1115 places, 746 transitions, 44275 flow. Second operand 29 states. [2020-10-16 03:37:49,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:37:49,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:37:49,667 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:37:53,914 INFO L129 PetriNetUnfolder]: 717/2009 cut-off events. [2020-10-16 03:37:53,915 INFO L130 PetriNetUnfolder]: For 1016536/1016538 co-relation queries the response was YES. [2020-10-16 03:37:54,001 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 03:37:54,033 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 196 selfloop transitions, 584 changer transitions 0/787 dead transitions. [2020-10-16 03:37:54,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1157 places, 787 transitions, 51035 flow [2020-10-16 03:37:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 03:37:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 03:37:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2899 transitions. [2020-10-16 03:37:54,035 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674186046511628 [2020-10-16 03:37:54,036 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2899 transitions. [2020-10-16 03:37:54,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2899 transitions. [2020-10-16 03:37:54,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:37:54,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2899 transitions. [2020-10-16 03:37:54,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 44 states. [2020-10-16 03:37:54,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 44 states. [2020-10-16 03:37:54,039 INFO L81 ComplementDD]: Finished complementDD. Result 44 states. [2020-10-16 03:37:54,039 INFO L185 Difference]: Start difference. First operand has 1115 places, 746 transitions, 44275 flow. Second operand 43 states and 2899 transitions. [2020-10-16 03:37:54,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1157 places, 787 transitions, 51035 flow [2020-10-16 03:38:02,670 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 03:38:02,700 INFO L241 Difference]: Finished difference. Result has 1120 places, 748 transitions, 44569 flow [2020-10-16 03:38:02,701 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 03:38:02,701 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1102 predicate places. [2020-10-16 03:38:02,701 INFO L481 AbstractCegarLoop]: Abstraction has has 1120 places, 748 transitions, 44569 flow [2020-10-16 03:38:02,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 03:38:02,701 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:38:02,701 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:38:02,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-16 03:38:02,902 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:38:02,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:38:02,903 INFO L82 PathProgramCache]: Analyzing trace with hash -759025666, now seen corresponding path program 181 times [2020-10-16 03:38:02,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:38:02,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142860394] [2020-10-16 03:38:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:38:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:38:03,378 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 03:38:03,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142860394] [2020-10-16 03:38:03,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900638756] [2020-10-16 03:38:03,379 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 03:38:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:38:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:38:03,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:38:03,462 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 03:38:03,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:38:03,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 03:38:03,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984984304] [2020-10-16 03:38:03,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:38:03,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:38:03,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:38:03,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:38:03,465 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:38:03,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1120 places, 748 transitions, 44569 flow. Second operand 28 states. [2020-10-16 03:38:03,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:38:03,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:38:03,466 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:38:07,789 INFO L129 PetriNetUnfolder]: 721/2021 cut-off events. [2020-10-16 03:38:07,789 INFO L130 PetriNetUnfolder]: For 1022128/1022134 co-relation queries the response was YES. [2020-10-16 03:38:07,872 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 03:38:07,902 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 170 selfloop transitions, 616 changer transitions 0/793 dead transitions. [2020-10-16 03:38:07,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1163 places, 793 transitions, 51680 flow [2020-10-16 03:38:07,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 03:38:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 03:38:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2967 transitions. [2020-10-16 03:38:07,906 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6743181818181818 [2020-10-16 03:38:07,906 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2967 transitions. [2020-10-16 03:38:07,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2967 transitions. [2020-10-16 03:38:07,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:38:07,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2967 transitions. [2020-10-16 03:38:07,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-16 03:38:07,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-16 03:38:07,911 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-16 03:38:07,912 INFO L185 Difference]: Start difference. First operand has 1120 places, 748 transitions, 44569 flow. Second operand 44 states and 2967 transitions. [2020-10-16 03:38:07,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1163 places, 793 transitions, 51680 flow [2020-10-16 03:38:16,275 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 03:38:16,306 INFO L241 Difference]: Finished difference. Result has 1126 places, 752 transitions, 44994 flow [2020-10-16 03:38:16,307 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 03:38:16,307 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1108 predicate places. [2020-10-16 03:38:16,307 INFO L481 AbstractCegarLoop]: Abstraction has has 1126 places, 752 transitions, 44994 flow [2020-10-16 03:38:16,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:38:16,307 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:38:16,307 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:38:16,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:38:16,508 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:38:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:38:16,509 INFO L82 PathProgramCache]: Analyzing trace with hash 998370090, now seen corresponding path program 182 times [2020-10-16 03:38:16,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:38:16,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259706609] [2020-10-16 03:38:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:38:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:38:16,964 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 03:38:16,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259706609] [2020-10-16 03:38:16,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581089136] [2020-10-16 03:38:16,964 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 03:38:17,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:38:17,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:38:17,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:38:17,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:38:17,050 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 03:38:17,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:38:17,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 03:38:17,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709376192] [2020-10-16 03:38:17,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:38:17,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:38:17,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:38:17,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:38:17,052 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:38:17,053 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1126 places, 752 transitions, 44994 flow. Second operand 28 states. [2020-10-16 03:38:17,053 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:38:17,053 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:38:17,053 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:38:21,189 INFO L129 PetriNetUnfolder]: 723/2027 cut-off events. [2020-10-16 03:38:21,189 INFO L130 PetriNetUnfolder]: For 1025190/1025192 co-relation queries the response was YES. [2020-10-16 03:38:21,272 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 03:38:21,303 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 140 selfloop transitions, 650 changer transitions 0/797 dead transitions. [2020-10-16 03:38:21,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1171 places, 797 transitions, 52282 flow [2020-10-16 03:38:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-16 03:38:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 03:38:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3103 transitions. [2020-10-16 03:38:21,306 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6745652173913044 [2020-10-16 03:38:21,306 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3103 transitions. [2020-10-16 03:38:21,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3103 transitions. [2020-10-16 03:38:21,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:38:21,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3103 transitions. [2020-10-16 03:38:21,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-16 03:38:21,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-16 03:38:21,310 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-16 03:38:21,310 INFO L185 Difference]: Start difference. First operand has 1126 places, 752 transitions, 44994 flow. Second operand 46 states and 3103 transitions. [2020-10-16 03:38:21,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1171 places, 797 transitions, 52282 flow [2020-10-16 03:38:29,229 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 03:38:29,260 INFO L241 Difference]: Finished difference. Result has 1131 places, 754 transitions, 45338 flow [2020-10-16 03:38:29,261 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 03:38:29,261 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1113 predicate places. [2020-10-16 03:38:29,262 INFO L481 AbstractCegarLoop]: Abstraction has has 1131 places, 754 transitions, 45338 flow [2020-10-16 03:38:29,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:38:29,262 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:38:29,262 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:38:29,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:38:29,477 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:38:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:38:29,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1518113166, now seen corresponding path program 183 times [2020-10-16 03:38:29,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:38:29,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855534151] [2020-10-16 03:38:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:38:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:38:29,947 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 03:38:29,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855534151] [2020-10-16 03:38:29,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290603818] [2020-10-16 03:38:29,948 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 03:38:30,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-16 03:38:30,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:38:30,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:38:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:38:30,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:38:30,070 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 03:38:30,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:38:30,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 03:38:30,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637800257] [2020-10-16 03:38:30,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 03:38:30,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:38:30,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 03:38:30,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-10-16 03:38:30,072 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:38:30,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1131 places, 754 transitions, 45338 flow. Second operand 29 states. [2020-10-16 03:38:30,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:38:30,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:38:30,073 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:38:34,678 INFO L129 PetriNetUnfolder]: 727/2039 cut-off events. [2020-10-16 03:38:34,678 INFO L130 PetriNetUnfolder]: For 1030895/1030901 co-relation queries the response was YES. [2020-10-16 03:38:34,762 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 03:38:34,794 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 130 selfloop transitions, 664 changer transitions 0/801 dead transitions. [2020-10-16 03:38:34,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1177 places, 801 transitions, 52713 flow [2020-10-16 03:38:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 03:38:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 03:38:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3171 transitions. [2020-10-16 03:38:34,797 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6746808510638298 [2020-10-16 03:38:34,797 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3171 transitions. [2020-10-16 03:38:34,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3171 transitions. [2020-10-16 03:38:34,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:38:34,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3171 transitions. [2020-10-16 03:38:34,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-16 03:38:34,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-16 03:38:34,801 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-16 03:38:34,801 INFO L185 Difference]: Start difference. First operand has 1131 places, 754 transitions, 45338 flow. Second operand 47 states and 3171 transitions. [2020-10-16 03:38:34,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1177 places, 801 transitions, 52713 flow [2020-10-16 03:38:42,799 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 03:38:42,831 INFO L241 Difference]: Finished difference. Result has 1137 places, 758 transitions, 45807 flow [2020-10-16 03:38:42,831 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 03:38:42,832 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1119 predicate places. [2020-10-16 03:38:42,832 INFO L481 AbstractCegarLoop]: Abstraction has has 1137 places, 758 transitions, 45807 flow [2020-10-16 03:38:42,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 03:38:42,832 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:38:42,832 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:38:43,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:38:43,033 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:38:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:38:43,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1924292462, now seen corresponding path program 184 times [2020-10-16 03:38:43,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:38:43,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853844269] [2020-10-16 03:38:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:38:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:38:43,494 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 03:38:43,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853844269] [2020-10-16 03:38:43,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937167979] [2020-10-16 03:38:43,495 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 03:38:43,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:38:43,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:38:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:38:43,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:38:43,584 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 03:38:43,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:38:43,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-16 03:38:43,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014410180] [2020-10-16 03:38:43,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 03:38:43,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:38:43,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 03:38:43,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-16 03:38:43,586 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:38:43,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1137 places, 758 transitions, 45807 flow. Second operand 28 states. [2020-10-16 03:38:43,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:38:43,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:38:43,587 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:38:48,248 INFO L129 PetriNetUnfolder]: 731/2051 cut-off events. [2020-10-16 03:38:48,248 INFO L130 PetriNetUnfolder]: For 1036560/1036566 co-relation queries the response was YES. [2020-10-16 03:38:48,317 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 03:38:48,351 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 90 selfloop transitions, 712 changer transitions 0/809 dead transitions. [2020-10-16 03:38:48,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1186 places, 809 transitions, 53700 flow [2020-10-16 03:38:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-16 03:38:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 03:38:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3375 transitions. [2020-10-16 03:38:48,353 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:38:48,354 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3375 transitions. [2020-10-16 03:38:48,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3375 transitions. [2020-10-16 03:38:48,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:38:48,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3375 transitions. [2020-10-16 03:38:48,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 51 states. [2020-10-16 03:38:48,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 51 states. [2020-10-16 03:38:48,357 INFO L81 ComplementDD]: Finished complementDD. Result 51 states. [2020-10-16 03:38:48,358 INFO L185 Difference]: Start difference. First operand has 1137 places, 758 transitions, 45807 flow. Second operand 50 states and 3375 transitions. [2020-10-16 03:38:48,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1186 places, 809 transitions, 53700 flow [2020-10-16 03:38:56,303 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 03:38:56,340 INFO L241 Difference]: Finished difference. Result has 1144 places, 762 transitions, 46301 flow [2020-10-16 03:38:56,341 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 03:38:56,341 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 1126 predicate places. [2020-10-16 03:38:56,341 INFO L481 AbstractCegarLoop]: Abstraction has has 1144 places, 762 transitions, 46301 flow [2020-10-16 03:38:56,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 03:38:56,341 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:38:56,341 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:38:56,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:38:56,542 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:38:56,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:38:56,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1940379602, now seen corresponding path program 185 times [2020-10-16 03:38:56,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:38:56,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022628273] [2020-10-16 03:38:56,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:38:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:38:57,015 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 03:38:57,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022628273] [2020-10-16 03:38:57,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287984075] [2020-10-16 03:38:57,016 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 03:38:57,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-16 03:38:57,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:38:57,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 03:38:57,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:38:57,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:38:57,142 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 03:38:57,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:38:57,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 03:38:57,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405926982] [2020-10-16 03:38:57,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 03:38:57,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:38:57,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 03:38:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-16 03:38:57,144 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:38:57,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1144 places, 762 transitions, 46301 flow. Second operand 29 states. [2020-10-16 03:38:57,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:38:57,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:38:57,145 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:39:02,079 INFO L129 PetriNetUnfolder]: 733/2056 cut-off events. [2020-10-16 03:39:02,079 INFO L130 PetriNetUnfolder]: For 1038964/1038970 co-relation queries the response was YES. [2020-10-16 03:39:02,165 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 03:39:02,196 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 86 selfloop transitions, 718 changer transitions 0/811 dead transitions. [2020-10-16 03:39:02,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1194 places, 811 transitions, 54125 flow [2020-10-16 03:39:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-16 03:39:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 03:39:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3443 transitions. [2020-10-16 03:39:02,199 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6750980392156862 [2020-10-16 03:39:02,199 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3443 transitions. [2020-10-16 03:39:02,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3443 transitions. [2020-10-16 03:39:02,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:39:02,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3443 transitions. [2020-10-16 03:39:02,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 52 states. [2020-10-16 03:39:02,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 52 states. [2020-10-16 03:39:02,205 INFO L81 ComplementDD]: Finished complementDD. Result 52 states. [2020-10-16 03:39:02,205 INFO L185 Difference]: Start difference. First operand has 1144 places, 762 transitions, 46301 flow. Second operand 51 states and 3443 transitions. [2020-10-16 03:39:02,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1194 places, 811 transitions, 54125 flow Received shutdown request... [2020-10-16 03:39:06,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-16 03:39:06,263 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 03:39:06,268 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 03:39:06,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:39:06 BasicIcfg [2020-10-16 03:39:06,269 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 03:39:06,270 INFO L168 Benchmark]: Toolchain (without parser) took 848922.25 ms. Allocated memory was 250.6 MB in the beginning and 4.2 GB in the end (delta: 3.9 GB). Free memory was 205.6 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 2.9 GB. Max. memory is 14.2 GB. [2020-10-16 03:39:06,270 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 250.6 MB. Free memory was 228.7 MB in the beginning and 227.8 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. [2020-10-16 03:39:06,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 929.27 ms. Allocated memory was 250.6 MB in the beginning and 310.9 MB in the end (delta: 60.3 MB). Free memory was 205.6 MB in the beginning and 264.9 MB in the end (delta: -59.3 MB). Peak memory consumption was 27.7 MB. Max. memory is 14.2 GB. [2020-10-16 03:39:06,271 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.47 ms. Allocated memory is still 310.9 MB. Free memory was 264.9 MB in the beginning and 262.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 03:39:06,271 INFO L168 Benchmark]: Boogie Preprocessor took 30.68 ms. Allocated memory is still 310.9 MB. Free memory was 262.4 MB in the beginning and 260.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-16 03:39:06,272 INFO L168 Benchmark]: RCFGBuilder took 474.64 ms. Allocated memory is still 310.9 MB. Free memory was 260.7 MB in the beginning and 240.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 14.2 GB. [2020-10-16 03:39:06,272 INFO L168 Benchmark]: TraceAbstraction took 847424.36 ms. Allocated memory was 310.9 MB in the beginning and 4.2 GB in the end (delta: 3.9 GB). Free memory was 239.6 MB in the beginning and 1.2 GB in the end (delta: -989.5 MB). Peak memory consumption was 2.9 GB. Max. memory is 14.2 GB. [2020-10-16 03:39:06,274 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 250.6 MB. Free memory was 228.7 MB in the beginning and 227.8 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 929.27 ms. Allocated memory was 250.6 MB in the beginning and 310.9 MB in the end (delta: 60.3 MB). Free memory was 205.6 MB in the beginning and 264.9 MB in the end (delta: -59.3 MB). Peak memory consumption was 27.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 53.47 ms. Allocated memory is still 310.9 MB. Free memory was 264.9 MB in the beginning and 262.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 30.68 ms. Allocated memory is still 310.9 MB. Free memory was 262.4 MB in the beginning and 260.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 474.64 ms. Allocated memory is still 310.9 MB. Free memory was 260.7 MB in the beginning and 240.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 847424.36 ms. Allocated memory was 310.9 MB in the beginning and 4.2 GB in the end (delta: 3.9 GB). Free memory was 239.6 MB in the beginning and 1.2 GB in the end (delta: -989.5 MB). Peak memory consumption was 2.9 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 executing RemoveRedundantFlow. - 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: 847.2s, OverallIterations: 187, TraceHistogramMax: 12, AutomataDifference: 743.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 398 SDtfs, 5716 SDslu, 747 SDs, 0 SdLazy, 23289 SolverSat, 15694 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12366 GetRequests, 3951 SyntacticMatches, 182 SemanticMatches, 8233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104443 ImplicationChecksByTransitivity, 172.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46301occurred in iteration=186, 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, 52.6s InterpolantComputationTime, 8880 NumberOfCodeBlocks, 8880 NumberOfCodeBlocksAsserted, 1097 NumberOfCheckSat, 8511 ConstructedInterpolants, 0 QuantifiedInterpolants, 954447 SizeOfPredicates, 2962 NumberOfNonLiveVariables, 26458 ConjunctsInSsa, 3697 ConjunctsInUnsatCore, 369 InterpolantComputations, 5 PerfectInterpolantSequences, 0/24446 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