./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:16:48,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:16:48,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:16:48,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:16:48,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:16:48,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:16:48,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:16:48,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:16:48,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:16:48,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:16:48,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:16:48,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:16:48,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:16:48,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:16:48,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:16:48,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:16:48,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:16:48,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:16:48,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:16:48,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:16:48,640 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:16:48,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:16:48,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:16:48,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:16:48,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:16:48,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:16:48,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:16:48,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:16:48,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:16:48,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:16:48,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:16:48,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:16:48,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:16:48,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:16:48,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:16:48,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:16:48,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:16:48,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:16:48,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:16:48,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:16:48,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:16:48,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:16:48,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:16:48,683 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:16:48,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:16:48,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:16:48,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:16:48,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:16:48,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:16:48,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:16:48,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:16:48,686 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:16:48,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:16:48,686 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:16:48,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:16:48,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:16:48,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:16:48,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:16:48,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:16:48,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:16:48,688 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:16:48,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:16:48,688 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:16:48,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:16:48,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:16:48,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:16:48,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:16:48,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:16:48,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:16:48,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:16:48,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:16:48,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:16:48,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:16:48,690 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:16:48,690 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:16:48,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:16:48,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 [2022-07-12 10:16:48,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:16:48,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:16:48,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:16:48,908 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:16:48,909 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:16:48,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2022-07-12 10:16:48,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d3d36e63/04ffc3a4dbf24e079530bc4771dbd8f1/FLAG99190be42 [2022-07-12 10:16:49,345 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:16:49,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2022-07-12 10:16:49,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d3d36e63/04ffc3a4dbf24e079530bc4771dbd8f1/FLAG99190be42 [2022-07-12 10:16:49,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d3d36e63/04ffc3a4dbf24e079530bc4771dbd8f1 [2022-07-12 10:16:49,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:16:49,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:16:49,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:16:49,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:16:49,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:16:49,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447e8ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49, skipping insertion in model container [2022-07-12 10:16:49,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:16:49,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:16:49,683 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2022-07-12 10:16:49,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:16:49,713 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:16:49,752 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2022-07-12 10:16:49,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:16:49,789 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:16:49,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49 WrapperNode [2022-07-12 10:16:49,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:16:49,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:16:49,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:16:49,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:16:49,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,817 INFO L137 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-07-12 10:16:49,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:16:49,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:16:49,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:16:49,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:16:49,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:16:49,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:16:49,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:16:49,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:16:49,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49" (1/1) ... [2022-07-12 10:16:49,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:16:49,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:49,863 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:16:49,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:16:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:16:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:16:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:16:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:16:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:16:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:16:49,889 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:16:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:16:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:16:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:16:49,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:16:49,890 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:16:49,961 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:16:49,963 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:16:50,157 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:16:50,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:16:50,163 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-12 10:16:50,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:16:50 BoogieIcfgContainer [2022-07-12 10:16:50,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:16:50,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:16:50,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:16:50,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:16:50,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:16:49" (1/3) ... [2022-07-12 10:16:50,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec1ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:16:50, skipping insertion in model container [2022-07-12 10:16:50,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:49" (2/3) ... [2022-07-12 10:16:50,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec1ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:16:50, skipping insertion in model container [2022-07-12 10:16:50,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:16:50" (3/3) ... [2022-07-12 10:16:50,171 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2022-07-12 10:16:50,175 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:16:50,182 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:16:50,182 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:16:50,182 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:16:50,223 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:16:50,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 108 places, 117 transitions, 242 flow [2022-07-12 10:16:50,296 INFO L129 PetriNetUnfolder]: 17/155 cut-off events. [2022-07-12 10:16:50,297 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:16:50,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 155 events. 17/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 381 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2022-07-12 10:16:50,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 117 transitions, 242 flow [2022-07-12 10:16:50,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 229 flow [2022-07-12 10:16:50,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:50,318 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f1ece0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec41ac0 [2022-07-12 10:16:50,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:50,331 INFO L129 PetriNetUnfolder]: 5/88 cut-off events. [2022-07-12 10:16:50,331 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:50,331 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:50,332 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:50,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1995812797, now seen corresponding path program 1 times [2022-07-12 10:16:50,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:50,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460561602] [2022-07-12 10:16:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:50,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:50,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:50,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460561602] [2022-07-12 10:16:50,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460561602] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:50,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:50,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:50,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238848105] [2022-07-12 10:16:50,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:50,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:50,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:50,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:50,606 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 117 [2022-07-12 10:16:50,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:50,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 117 [2022-07-12 10:16:50,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:50,652 INFO L129 PetriNetUnfolder]: 0/104 cut-off events. [2022-07-12 10:16:50,652 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:50,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 0/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 23/124 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-12 10:16:50,654 INFO L132 encePairwiseOnDemand]: 103/117 looper letters, 8 selfloop transitions, 2 changer transitions 16/102 dead transitions. [2022-07-12 10:16:50,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 102 transitions, 229 flow [2022-07-12 10:16:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-07-12 10:16:50,667 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9031339031339032 [2022-07-12 10:16:50,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-07-12 10:16:50,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-07-12 10:16:50,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:50,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-07-12 10:16:50,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,684 INFO L186 Difference]: Start difference. First operand has 104 places, 112 transitions, 229 flow. Second operand 3 states and 317 transitions. [2022-07-12 10:16:50,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 102 transitions, 229 flow [2022-07-12 10:16:50,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 102 transitions, 229 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:50,689 INFO L242 Difference]: Finished difference. Result has 106 places, 84 transitions, 181 flow [2022-07-12 10:16:50,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=106, PETRI_TRANSITIONS=84} [2022-07-12 10:16:50,693 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2022-07-12 10:16:50,693 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 84 transitions, 181 flow [2022-07-12 10:16:50,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,694 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:50,694 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:50,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:16:50,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:50,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:50,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2130970929, now seen corresponding path program 1 times [2022-07-12 10:16:50,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:50,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212485312] [2022-07-12 10:16:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:50,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:50,723 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:50,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:50,777 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:50,781 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:50,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:50,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:16:50,783 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:16:50,788 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:50,788 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:16:50,828 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:16:50,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 137 places, 151 transitions, 320 flow [2022-07-12 10:16:50,853 INFO L129 PetriNetUnfolder]: 31/252 cut-off events. [2022-07-12 10:16:50,853 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:16:50,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 252 events. 31/252 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 760 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2022-07-12 10:16:50,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 151 transitions, 320 flow [2022-07-12 10:16:50,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 151 transitions, 320 flow [2022-07-12 10:16:50,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:50,859 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f1ece0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec41ac0 [2022-07-12 10:16:50,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:50,865 INFO L129 PetriNetUnfolder]: 6/91 cut-off events. [2022-07-12 10:16:50,865 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:50,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:50,865 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:50,866 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:50,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:50,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1413483307, now seen corresponding path program 1 times [2022-07-12 10:16:50,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:50,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290079028] [2022-07-12 10:16:50,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:50,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:50,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:50,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290079028] [2022-07-12 10:16:50,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290079028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:50,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:50,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:50,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235944632] [2022-07-12 10:16:50,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:50,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:50,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:50,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:50,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:50,926 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 151 [2022-07-12 10:16:50,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 151 transitions, 320 flow. Second operand has 2 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:50,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 151 [2022-07-12 10:16:50,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:50,980 INFO L129 PetriNetUnfolder]: 3/221 cut-off events. [2022-07-12 10:16:50,982 INFO L130 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-07-12 10:16:50,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 221 events. 3/221 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 564 event pairs, 0 based on Foata normal form. 42/253 useless extension candidates. Maximal degree in co-relation 141. Up to 7 conditions per place. [2022-07-12 10:16:50,986 INFO L132 encePairwiseOnDemand]: 134/151 looper letters, 2 selfloop transitions, 0 changer transitions 22/133 dead transitions. [2022-07-12 10:16:50,986 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 133 transitions, 292 flow [2022-07-12 10:16:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 279 transitions. [2022-07-12 10:16:50,990 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9238410596026491 [2022-07-12 10:16:50,992 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 279 transitions. [2022-07-12 10:16:50,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 279 transitions. [2022-07-12 10:16:50,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:50,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 279 transitions. [2022-07-12 10:16:50,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 139.5) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,999 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,999 INFO L186 Difference]: Start difference. First operand has 137 places, 151 transitions, 320 flow. Second operand 2 states and 279 transitions. [2022-07-12 10:16:50,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 133 transitions, 292 flow [2022-07-12 10:16:51,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 133 transitions, 292 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:51,003 INFO L242 Difference]: Finished difference. Result has 137 places, 111 transitions, 234 flow [2022-07-12 10:16:51,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=234, PETRI_PLACES=137, PETRI_TRANSITIONS=111} [2022-07-12 10:16:51,005 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, 0 predicate places. [2022-07-12 10:16:51,005 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 111 transitions, 234 flow [2022-07-12 10:16:51,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,005 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:51,005 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:51,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:16:51,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1284400588, now seen corresponding path program 1 times [2022-07-12 10:16:51,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:51,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053616819] [2022-07-12 10:16:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:51,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:51,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:51,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053616819] [2022-07-12 10:16:51,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053616819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:51,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:51,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:51,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979212952] [2022-07-12 10:16:51,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:51,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:51,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:51,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:51,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:51,054 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 151 [2022-07-12 10:16:51,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 111 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:51,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 151 [2022-07-12 10:16:51,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:51,085 INFO L129 PetriNetUnfolder]: 0/136 cut-off events. [2022-07-12 10:16:51,085 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:16:51,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 136 events. 0/136 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 211 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-12 10:16:51,086 INFO L132 encePairwiseOnDemand]: 148/151 looper letters, 11 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2022-07-12 10:16:51,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 268 flow [2022-07-12 10:16:51,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2022-07-12 10:16:51,089 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8388520971302428 [2022-07-12 10:16:51,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2022-07-12 10:16:51,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2022-07-12 10:16:51,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:51,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2022-07-12 10:16:51,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,093 INFO L186 Difference]: Start difference. First operand has 137 places, 111 transitions, 234 flow. Second operand 3 states and 380 transitions. [2022-07-12 10:16:51,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 268 flow [2022-07-12 10:16:51,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 115 transitions, 266 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:51,099 INFO L242 Difference]: Finished difference. Result has 120 places, 112 transitions, 244 flow [2022-07-12 10:16:51,099 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=120, PETRI_TRANSITIONS=112} [2022-07-12 10:16:51,101 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, -17 predicate places. [2022-07-12 10:16:51,101 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 112 transitions, 244 flow [2022-07-12 10:16:51,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,102 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:51,102 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:51,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:16:51,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1394495559, now seen corresponding path program 1 times [2022-07-12 10:16:51,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:51,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113211361] [2022-07-12 10:16:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:51,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:51,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113211361] [2022-07-12 10:16:51,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113211361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:51,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280862261] [2022-07-12 10:16:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:51,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:51,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:51,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:51,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:16:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:51,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:51,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:51,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:51,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280862261] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:51,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:51,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:51,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684156969] [2022-07-12 10:16:51,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:51,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:51,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:51,412 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 151 [2022-07-12 10:16:51,414 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 112 transitions, 244 flow. Second operand has 10 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:51,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 151 [2022-07-12 10:16:51,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:51,491 INFO L129 PetriNetUnfolder]: 0/112 cut-off events. [2022-07-12 10:16:51,492 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:16:51,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 112 events. 0/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/114 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-12 10:16:51,492 INFO L132 encePairwiseOnDemand]: 146/151 looper letters, 9 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2022-07-12 10:16:51,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 106 transitions, 262 flow [2022-07-12 10:16:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1107 transitions. [2022-07-12 10:16:51,496 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8145695364238411 [2022-07-12 10:16:51,496 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1107 transitions. [2022-07-12 10:16:51,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1107 transitions. [2022-07-12 10:16:51,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:51,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1107 transitions. [2022-07-12 10:16:51,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 123.0) internal successors, (1107), 9 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 151.0) internal successors, (1510), 10 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,501 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 151.0) internal successors, (1510), 10 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,501 INFO L186 Difference]: Start difference. First operand has 120 places, 112 transitions, 244 flow. Second operand 9 states and 1107 transitions. [2022-07-12 10:16:51,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 106 transitions, 262 flow [2022-07-12 10:16:51,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 106 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:51,506 INFO L242 Difference]: Finished difference. Result has 115 places, 102 transitions, 234 flow [2022-07-12 10:16:51,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2022-07-12 10:16:51,509 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, -22 predicate places. [2022-07-12 10:16:51,509 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 234 flow [2022-07-12 10:16:51,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,510 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:51,510 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:51,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:16:51,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:51,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1558999955, now seen corresponding path program 1 times [2022-07-12 10:16:51,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:51,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395792844] [2022-07-12 10:16:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:51,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:51,756 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:51,781 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:51,781 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:51,782 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:51,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:51,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:16:51,782 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:16:51,783 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:51,783 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:16:51,811 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:16:51,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2022-07-12 10:16:51,848 INFO L129 PetriNetUnfolder]: 50/382 cut-off events. [2022-07-12 10:16:51,848 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:16:51,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 382 events. 50/382 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1303 event pairs, 1 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 260. Up to 16 conditions per place. [2022-07-12 10:16:51,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 400 flow [2022-07-12 10:16:51,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 400 flow [2022-07-12 10:16:51,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:51,860 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f1ece0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec41ac0 [2022-07-12 10:16:51,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:51,874 INFO L129 PetriNetUnfolder]: 6/95 cut-off events. [2022-07-12 10:16:51,874 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:51,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:51,875 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:51,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1747768563, now seen corresponding path program 1 times [2022-07-12 10:16:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:51,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932136169] [2022-07-12 10:16:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:51,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:51,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:51,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932136169] [2022-07-12 10:16:51,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932136169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:51,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:51,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468230793] [2022-07-12 10:16:51,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:51,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:51,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:51,916 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 185 [2022-07-12 10:16:51,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 185 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:51,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 185 [2022-07-12 10:16:51,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:51,974 INFO L129 PetriNetUnfolder]: 7/317 cut-off events. [2022-07-12 10:16:51,975 INFO L130 PetriNetUnfolder]: For 49/91 co-relation queries the response was YES. [2022-07-12 10:16:51,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 317 events. 7/317 cut-off events. For 49/91 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 966 event pairs, 1 based on Foata normal form. 192/495 useless extension candidates. Maximal degree in co-relation 230. Up to 30 conditions per place. [2022-07-12 10:16:51,977 INFO L132 encePairwiseOnDemand]: 159/185 looper letters, 12 selfloop transitions, 2 changer transitions 23/165 dead transitions. [2022-07-12 10:16:51,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 165 transitions, 394 flow [2022-07-12 10:16:51,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2022-07-12 10:16:51,979 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8864864864864865 [2022-07-12 10:16:51,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2022-07-12 10:16:51,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2022-07-12 10:16:51,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:51,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2022-07-12 10:16:51,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,982 INFO L186 Difference]: Start difference. First operand has 166 places, 185 transitions, 400 flow. Second operand 3 states and 492 transitions. [2022-07-12 10:16:51,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 165 transitions, 394 flow [2022-07-12 10:16:51,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 165 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:51,985 INFO L242 Difference]: Finished difference. Result has 168 places, 139 transitions, 309 flow [2022-07-12 10:16:51,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=309, PETRI_PLACES=168, PETRI_TRANSITIONS=139} [2022-07-12 10:16:51,985 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 2 predicate places. [2022-07-12 10:16:51,986 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 139 transitions, 309 flow [2022-07-12 10:16:51,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,986 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:51,986 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:51,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:16:51,986 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:51,987 INFO L85 PathProgramCache]: Analyzing trace with hash -109138734, now seen corresponding path program 1 times [2022-07-12 10:16:51,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:51,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669843091] [2022-07-12 10:16:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:51,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:52,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669843091] [2022-07-12 10:16:52,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669843091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:52,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661458849] [2022-07-12 10:16:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:52,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:52,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:52,044 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:52,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:16:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:52,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:52,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661458849] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:52,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:52,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:52,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322669288] [2022-07-12 10:16:52,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:52,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:52,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:52,187 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 185 [2022-07-12 10:16:52,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 139 transitions, 309 flow. Second operand has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:52,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 185 [2022-07-12 10:16:52,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:52,246 INFO L129 PetriNetUnfolder]: 0/160 cut-off events. [2022-07-12 10:16:52,246 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:16:52,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 160 events. 0/160 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 245 event pairs, 0 based on Foata normal form. 2/162 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-12 10:16:52,247 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 13 selfloop transitions, 9 changer transitions 0/149 dead transitions. [2022-07-12 10:16:52,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 149 transitions, 375 flow [2022-07-12 10:16:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1347 transitions. [2022-07-12 10:16:52,250 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.809009009009009 [2022-07-12 10:16:52,250 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1347 transitions. [2022-07-12 10:16:52,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1347 transitions. [2022-07-12 10:16:52,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:52,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1347 transitions. [2022-07-12 10:16:52,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.66666666666666) internal successors, (1347), 9 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,255 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,255 INFO L186 Difference]: Start difference. First operand has 168 places, 139 transitions, 309 flow. Second operand 9 states and 1347 transitions. [2022-07-12 10:16:52,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 149 transitions, 375 flow [2022-07-12 10:16:52,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 149 transitions, 367 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:52,258 INFO L242 Difference]: Finished difference. Result has 158 places, 145 transitions, 351 flow [2022-07-12 10:16:52,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=351, PETRI_PLACES=158, PETRI_TRANSITIONS=145} [2022-07-12 10:16:52,259 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, -8 predicate places. [2022-07-12 10:16:52,259 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 145 transitions, 351 flow [2022-07-12 10:16:52,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:52,260 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:52,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:52,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-12 10:16:52,471 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:52,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash -258612950, now seen corresponding path program 1 times [2022-07-12 10:16:52,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:52,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848092449] [2022-07-12 10:16:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:52,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:52,486 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:52,527 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:52,528 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:52,528 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:52,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:52,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:16:52,528 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:16:52,529 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:52,529 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:16:52,543 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:16:52,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 195 places, 219 transitions, 482 flow [2022-07-12 10:16:52,590 INFO L129 PetriNetUnfolder]: 81/580 cut-off events. [2022-07-12 10:16:52,590 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-12 10:16:52,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 580 events. 81/580 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2277 event pairs, 6 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 402. Up to 32 conditions per place. [2022-07-12 10:16:52,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 219 transitions, 482 flow [2022-07-12 10:16:52,602 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 219 transitions, 482 flow [2022-07-12 10:16:52,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:52,603 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f1ece0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec41ac0 [2022-07-12 10:16:52,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:52,623 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2022-07-12 10:16:52,623 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:52,623 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:52,623 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:52,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:52,624 INFO L85 PathProgramCache]: Analyzing trace with hash 476626153, now seen corresponding path program 1 times [2022-07-12 10:16:52,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:52,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333413443] [2022-07-12 10:16:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:52,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:52,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333413443] [2022-07-12 10:16:52,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333413443] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:52,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:52,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:52,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191862269] [2022-07-12 10:16:52,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:52,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:52,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:52,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:52,641 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 219 [2022-07-12 10:16:52,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 219 transitions, 482 flow. Second operand has 2 states, 2 states have (on average 181.5) internal successors, (363), 2 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:52,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 219 [2022-07-12 10:16:52,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:52,709 INFO L129 PetriNetUnfolder]: 21/515 cut-off events. [2022-07-12 10:16:52,709 INFO L130 PetriNetUnfolder]: For 126/142 co-relation queries the response was YES. [2022-07-12 10:16:52,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 515 events. 21/515 cut-off events. For 126/142 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2060 event pairs, 6 based on Foata normal form. 248/737 useless extension candidates. Maximal degree in co-relation 371. Up to 37 conditions per place. [2022-07-12 10:16:52,713 INFO L132 encePairwiseOnDemand]: 190/219 looper letters, 4 selfloop transitions, 0 changer transitions 24/189 dead transitions. [2022-07-12 10:16:52,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 189 transitions, 438 flow [2022-07-12 10:16:52,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 399 transitions. [2022-07-12 10:16:52,715 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.910958904109589 [2022-07-12 10:16:52,715 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 399 transitions. [2022-07-12 10:16:52,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 399 transitions. [2022-07-12 10:16:52,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:52,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 399 transitions. [2022-07-12 10:16:52,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 199.5) internal successors, (399), 2 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,717 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,717 INFO L186 Difference]: Start difference. First operand has 195 places, 219 transitions, 482 flow. Second operand 2 states and 399 transitions. [2022-07-12 10:16:52,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 189 transitions, 438 flow [2022-07-12 10:16:52,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 189 transitions, 438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:52,720 INFO L242 Difference]: Finished difference. Result has 195 places, 165 transitions, 362 flow [2022-07-12 10:16:52,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=195, PETRI_TRANSITIONS=165} [2022-07-12 10:16:52,721 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, 0 predicate places. [2022-07-12 10:16:52,721 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 165 transitions, 362 flow [2022-07-12 10:16:52,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 181.5) internal successors, (363), 2 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,722 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:52,722 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:52,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:16:52,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:52,723 INFO L85 PathProgramCache]: Analyzing trace with hash 605708872, now seen corresponding path program 1 times [2022-07-12 10:16:52,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:52,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477504082] [2022-07-12 10:16:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:52,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:52,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477504082] [2022-07-12 10:16:52,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477504082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:52,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:52,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:52,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243471438] [2022-07-12 10:16:52,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:52,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:52,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:52,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:52,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:52,754 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 219 [2022-07-12 10:16:52,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 165 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:52,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 219 [2022-07-12 10:16:52,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:52,798 INFO L129 PetriNetUnfolder]: 0/232 cut-off events. [2022-07-12 10:16:52,798 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:16:52,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 232 events. 0/232 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 565 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-12 10:16:52,799 INFO L132 encePairwiseOnDemand]: 216/219 looper letters, 13 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2022-07-12 10:16:52,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 169 transitions, 400 flow [2022-07-12 10:16:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2022-07-12 10:16:52,812 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8188736681887366 [2022-07-12 10:16:52,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2022-07-12 10:16:52,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2022-07-12 10:16:52,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:52,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2022-07-12 10:16:52,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,815 INFO L186 Difference]: Start difference. First operand has 195 places, 165 transitions, 362 flow. Second operand 3 states and 538 transitions. [2022-07-12 10:16:52,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 169 transitions, 400 flow [2022-07-12 10:16:52,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 169 transitions, 388 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:52,817 INFO L242 Difference]: Finished difference. Result has 178 places, 166 transitions, 362 flow [2022-07-12 10:16:52,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=178, PETRI_TRANSITIONS=166} [2022-07-12 10:16:52,818 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, -17 predicate places. [2022-07-12 10:16:52,818 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 166 transitions, 362 flow [2022-07-12 10:16:52,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,818 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:52,818 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:52,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:16:52,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1870810355, now seen corresponding path program 1 times [2022-07-12 10:16:52,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:52,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160793961] [2022-07-12 10:16:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:52,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:52,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160793961] [2022-07-12 10:16:52,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160793961] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:52,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588297578] [2022-07-12 10:16:52,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:52,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:52,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:52,864 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:52,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:16:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:52,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:52,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:53,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588297578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:53,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:53,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:53,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517865941] [2022-07-12 10:16:53,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:53,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:53,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:53,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:53,006 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 219 [2022-07-12 10:16:53,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 166 transitions, 362 flow. Second operand has 10 states, 10 states have (on average 175.3) internal successors, (1753), 10 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:53,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 219 [2022-07-12 10:16:53,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:53,117 INFO L129 PetriNetUnfolder]: 0/208 cut-off events. [2022-07-12 10:16:53,117 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:16:53,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 208 events. 0/208 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 422 event pairs, 0 based on Foata normal form. 2/210 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-12 10:16:53,118 INFO L132 encePairwiseOnDemand]: 213/219 looper letters, 14 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2022-07-12 10:16:53,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 176 transitions, 430 flow [2022-07-12 10:16:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1582 transitions. [2022-07-12 10:16:53,122 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8026382546930492 [2022-07-12 10:16:53,122 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1582 transitions. [2022-07-12 10:16:53,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1582 transitions. [2022-07-12 10:16:53,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:53,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1582 transitions. [2022-07-12 10:16:53,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.77777777777777) internal successors, (1582), 9 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,130 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,130 INFO L186 Difference]: Start difference. First operand has 178 places, 166 transitions, 362 flow. Second operand 9 states and 1582 transitions. [2022-07-12 10:16:53,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 176 transitions, 430 flow [2022-07-12 10:16:53,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 176 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:53,134 INFO L242 Difference]: Finished difference. Result has 188 places, 172 transitions, 410 flow [2022-07-12 10:16:53,134 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=410, PETRI_PLACES=188, PETRI_TRANSITIONS=172} [2022-07-12 10:16:53,135 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, -7 predicate places. [2022-07-12 10:16:53,135 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 172 transitions, 410 flow [2022-07-12 10:16:53,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.3) internal successors, (1753), 10 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,136 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:53,136 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:53,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 10:16:53,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:53,351 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:53,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2118097268, now seen corresponding path program 1 times [2022-07-12 10:16:53,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:53,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589679798] [2022-07-12 10:16:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:53,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:53,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:53,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589679798] [2022-07-12 10:16:53,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589679798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:53,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366405175] [2022-07-12 10:16:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:53,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:53,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:53,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:53,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:16:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:53,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:53,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:53,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:53,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366405175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:53,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:53,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:53,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935300829] [2022-07-12 10:16:53,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:53,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:53,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:53,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:53,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:53,660 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 219 [2022-07-12 10:16:53,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 172 transitions, 410 flow. Second operand has 18 states, 18 states have (on average 175.61111111111111) internal successors, (3161), 18 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:53,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 219 [2022-07-12 10:16:53,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:53,772 INFO L129 PetriNetUnfolder]: 0/184 cut-off events. [2022-07-12 10:16:53,772 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-12 10:16:53,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 184 events. 0/184 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/186 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-12 10:16:53,773 INFO L132 encePairwiseOnDemand]: 214/219 looper letters, 15 selfloop transitions, 13 changer transitions 0/170 dead transitions. [2022-07-12 10:16:53,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 170 transitions, 474 flow [2022-07-12 10:16:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 10:16:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-12 10:16:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2625 transitions. [2022-07-12 10:16:53,778 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7990867579908676 [2022-07-12 10:16:53,778 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2625 transitions. [2022-07-12 10:16:53,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2625 transitions. [2022-07-12 10:16:53,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:53,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2625 transitions. [2022-07-12 10:16:53,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.0) internal successors, (2625), 15 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,788 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,788 INFO L186 Difference]: Start difference. First operand has 188 places, 172 transitions, 410 flow. Second operand 15 states and 2625 transitions. [2022-07-12 10:16:53,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 170 transitions, 474 flow [2022-07-12 10:16:53,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 170 transitions, 457 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-12 10:16:53,791 INFO L242 Difference]: Finished difference. Result has 186 places, 163 transitions, 406 flow [2022-07-12 10:16:53,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=406, PETRI_PLACES=186, PETRI_TRANSITIONS=163} [2022-07-12 10:16:53,792 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, -9 predicate places. [2022-07-12 10:16:53,792 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 163 transitions, 406 flow [2022-07-12 10:16:53,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 175.61111111111111) internal successors, (3161), 18 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,793 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:53,793 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:53,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:54,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:54,007 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:54,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1171405288, now seen corresponding path program 1 times [2022-07-12 10:16:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:54,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401309360] [2022-07-12 10:16:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:54,021 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:54,034 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:54,034 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:54,035 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:54,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:54,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:16:54,035 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:54,036 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:54,036 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:16:54,057 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-12 10:16:54,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 224 places, 253 transitions, 566 flow [2022-07-12 10:16:54,142 INFO L129 PetriNetUnfolder]: 140/918 cut-off events. [2022-07-12 10:16:54,142 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-12 10:16:54,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 918 events. 140/918 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4130 event pairs, 23 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 625. Up to 80 conditions per place. [2022-07-12 10:16:54,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 253 transitions, 566 flow [2022-07-12 10:16:54,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 253 transitions, 566 flow [2022-07-12 10:16:54,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:54,168 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f1ece0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec41ac0 [2022-07-12 10:16:54,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:54,172 INFO L129 PetriNetUnfolder]: 6/89 cut-off events. [2022-07-12 10:16:54,172 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:54,172 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:54,172 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:54,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:54,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1351981702, now seen corresponding path program 1 times [2022-07-12 10:16:54,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:54,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191113530] [2022-07-12 10:16:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:54,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:54,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:54,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191113530] [2022-07-12 10:16:54,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191113530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:54,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:54,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:54,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240253] [2022-07-12 10:16:54,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:54,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:54,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:54,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:54,188 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 253 [2022-07-12 10:16:54,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 253 transitions, 566 flow. Second operand has 2 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:54,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 253 [2022-07-12 10:16:54,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:54,313 INFO L129 PetriNetUnfolder]: 54/826 cut-off events. [2022-07-12 10:16:54,313 INFO L130 PetriNetUnfolder]: For 294/324 co-relation queries the response was YES. [2022-07-12 10:16:54,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 826 events. 54/826 cut-off events. For 294/324 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3937 event pairs, 23 based on Foata normal form. 574/1356 useless extension candidates. Maximal degree in co-relation 596. Up to 86 conditions per place. [2022-07-12 10:16:54,320 INFO L132 encePairwiseOnDemand]: 218/253 looper letters, 5 selfloop transitions, 0 changer transitions 25/217 dead transitions. [2022-07-12 10:16:54,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 217 transitions, 514 flow [2022-07-12 10:16:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 459 transitions. [2022-07-12 10:16:54,321 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9071146245059288 [2022-07-12 10:16:54,321 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 459 transitions. [2022-07-12 10:16:54,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 459 transitions. [2022-07-12 10:16:54,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:54,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 459 transitions. [2022-07-12 10:16:54,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 229.5) internal successors, (459), 2 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,324 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,324 INFO L186 Difference]: Start difference. First operand has 224 places, 253 transitions, 566 flow. Second operand 2 states and 459 transitions. [2022-07-12 10:16:54,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 217 transitions, 514 flow [2022-07-12 10:16:54,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 217 transitions, 514 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:54,328 INFO L242 Difference]: Finished difference. Result has 224 places, 192 transitions, 429 flow [2022-07-12 10:16:54,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=429, PETRI_PLACES=224, PETRI_TRANSITIONS=192} [2022-07-12 10:16:54,329 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 0 predicate places. [2022-07-12 10:16:54,329 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 192 transitions, 429 flow [2022-07-12 10:16:54,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:54,330 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:54,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:16:54,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1481064421, now seen corresponding path program 1 times [2022-07-12 10:16:54,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:54,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515845016] [2022-07-12 10:16:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:54,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:54,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:54,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515845016] [2022-07-12 10:16:54,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515845016] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:54,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:54,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:54,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426062630] [2022-07-12 10:16:54,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:54,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:54,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:54,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:54,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:54,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 253 [2022-07-12 10:16:54,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 192 transitions, 429 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:54,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 253 [2022-07-12 10:16:54,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:54,388 INFO L129 PetriNetUnfolder]: 0/280 cut-off events. [2022-07-12 10:16:54,388 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:16:54,388 INFO L84 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 280 events. 0/280 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 742 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-12 10:16:54,389 INFO L132 encePairwiseOnDemand]: 250/253 looper letters, 14 selfloop transitions, 2 changer transitions 0/196 dead transitions. [2022-07-12 10:16:54,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 196 transitions, 469 flow [2022-07-12 10:16:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2022-07-12 10:16:54,391 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8129117259552042 [2022-07-12 10:16:54,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2022-07-12 10:16:54,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2022-07-12 10:16:54,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:54,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2022-07-12 10:16:54,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,394 INFO L186 Difference]: Start difference. First operand has 224 places, 192 transitions, 429 flow. Second operand 3 states and 617 transitions. [2022-07-12 10:16:54,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 196 transitions, 469 flow [2022-07-12 10:16:54,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 196 transitions, 449 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:54,397 INFO L242 Difference]: Finished difference. Result has 207 places, 193 transitions, 421 flow [2022-07-12 10:16:54,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=207, PETRI_TRANSITIONS=193} [2022-07-12 10:16:54,397 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -17 predicate places. [2022-07-12 10:16:54,398 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 193 transitions, 421 flow [2022-07-12 10:16:54,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,398 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:54,398 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:54,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:16:54,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1910424170, now seen corresponding path program 1 times [2022-07-12 10:16:54,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:54,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050100632] [2022-07-12 10:16:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:54,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:54,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:54,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050100632] [2022-07-12 10:16:54,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050100632] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:54,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811644386] [2022-07-12 10:16:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:54,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:54,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:54,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:54,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:16:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:54,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:54,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:54,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:54,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811644386] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:54,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:54,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:54,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694219985] [2022-07-12 10:16:54,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:54,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:54,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:54,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:54,597 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 253 [2022-07-12 10:16:54,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 193 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 201.3) internal successors, (2013), 10 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:54,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 253 [2022-07-12 10:16:54,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:54,695 INFO L129 PetriNetUnfolder]: 0/256 cut-off events. [2022-07-12 10:16:54,695 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:16:54,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 256 events. 0/256 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 600 event pairs, 0 based on Foata normal form. 2/258 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-12 10:16:54,696 INFO L132 encePairwiseOnDemand]: 247/253 looper letters, 15 selfloop transitions, 9 changer transitions 0/203 dead transitions. [2022-07-12 10:16:54,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 203 transitions, 491 flow [2022-07-12 10:16:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:54,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1817 transitions. [2022-07-12 10:16:54,699 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2022-07-12 10:16:54,700 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1817 transitions. [2022-07-12 10:16:54,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1817 transitions. [2022-07-12 10:16:54,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:54,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1817 transitions. [2022-07-12 10:16:54,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 201.88888888888889) internal successors, (1817), 9 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,707 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,709 INFO L186 Difference]: Start difference. First operand has 207 places, 193 transitions, 421 flow. Second operand 9 states and 1817 transitions. [2022-07-12 10:16:54,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 203 transitions, 491 flow [2022-07-12 10:16:54,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 203 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:54,712 INFO L242 Difference]: Finished difference. Result has 217 places, 199 transitions, 469 flow [2022-07-12 10:16:54,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=469, PETRI_PLACES=217, PETRI_TRANSITIONS=199} [2022-07-12 10:16:54,713 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -7 predicate places. [2022-07-12 10:16:54,714 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 199 transitions, 469 flow [2022-07-12 10:16:54,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 201.3) internal successors, (2013), 10 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,719 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:54,720 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:54,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:54,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 10:16:54,933 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1383824465, now seen corresponding path program 1 times [2022-07-12 10:16:54,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:54,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535564015] [2022-07-12 10:16:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:54,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:54,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:54,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535564015] [2022-07-12 10:16:54,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535564015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:54,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248918251] [2022-07-12 10:16:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:54,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:54,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:54,996 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:54,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:16:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:55,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:55,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:55,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:55,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248918251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:55,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:55,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:55,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089803429] [2022-07-12 10:16:55,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:55,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:55,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:55,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:55,186 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 253 [2022-07-12 10:16:55,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 199 transitions, 469 flow. Second operand has 18 states, 18 states have (on average 201.61111111111111) internal successors, (3629), 18 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:55,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 253 [2022-07-12 10:16:55,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:55,312 INFO L129 PetriNetUnfolder]: 0/220 cut-off events. [2022-07-12 10:16:55,313 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-12 10:16:55,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 220 events. 0/220 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/223 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-12 10:16:55,313 INFO L132 encePairwiseOnDemand]: 248/253 looper letters, 18 selfloop transitions, 16 changer transitions 0/202 dead transitions. [2022-07-12 10:16:55,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 202 transitions, 569 flow [2022-07-12 10:16:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:16:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:16:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3619 transitions. [2022-07-12 10:16:55,319 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946859903381642 [2022-07-12 10:16:55,319 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3619 transitions. [2022-07-12 10:16:55,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3619 transitions. [2022-07-12 10:16:55,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:55,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3619 transitions. [2022-07-12 10:16:55,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 201.05555555555554) internal successors, (3619), 18 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,332 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,332 INFO L186 Difference]: Start difference. First operand has 217 places, 199 transitions, 469 flow. Second operand 18 states and 3619 transitions. [2022-07-12 10:16:55,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 202 transitions, 569 flow [2022-07-12 10:16:55,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 202 transitions, 548 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-12 10:16:55,336 INFO L242 Difference]: Finished difference. Result has 218 places, 193 transitions, 484 flow [2022-07-12 10:16:55,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=484, PETRI_PLACES=218, PETRI_TRANSITIONS=193} [2022-07-12 10:16:55,337 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -6 predicate places. [2022-07-12 10:16:55,337 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 193 transitions, 484 flow [2022-07-12 10:16:55,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 201.61111111111111) internal successors, (3629), 18 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,338 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:55,338 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:55,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:55,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 10:16:55,556 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:55,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1562773209, now seen corresponding path program 1 times [2022-07-12 10:16:55,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:55,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200141166] [2022-07-12 10:16:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:55,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:55,570 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:55,585 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:55,585 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:55,585 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:55,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:55,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 10:16:55,586 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:55,586 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:55,586 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-12 10:16:55,610 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-12 10:16:55,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 253 places, 287 transitions, 652 flow [2022-07-12 10:16:55,769 INFO L129 PetriNetUnfolder]: 263/1544 cut-off events. [2022-07-12 10:16:55,769 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-12 10:16:55,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1776 conditions, 1544 events. 263/1544 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8615 event pairs, 72 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 1017. Up to 192 conditions per place. [2022-07-12 10:16:55,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 287 transitions, 652 flow [2022-07-12 10:16:55,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 253 places, 287 transitions, 652 flow [2022-07-12 10:16:55,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:55,810 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f1ece0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec41ac0 [2022-07-12 10:16:55,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:55,814 INFO L129 PetriNetUnfolder]: 5/86 cut-off events. [2022-07-12 10:16:55,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:55,814 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:55,814 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:55,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash 749215365, now seen corresponding path program 1 times [2022-07-12 10:16:55,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:55,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414705221] [2022-07-12 10:16:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:55,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:55,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:55,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414705221] [2022-07-12 10:16:55,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414705221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:55,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:55,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:55,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775621301] [2022-07-12 10:16:55,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:55,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:55,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:55,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:55,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:55,827 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 287 [2022-07-12 10:16:55,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 287 transitions, 652 flow. Second operand has 2 states, 2 states have (on average 233.5) internal successors, (467), 2 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:55,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 287 [2022-07-12 10:16:55,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:56,013 INFO L129 PetriNetUnfolder]: 135/1409 cut-off events. [2022-07-12 10:16:56,014 INFO L130 PetriNetUnfolder]: For 659/697 co-relation queries the response was YES. [2022-07-12 10:16:56,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 1409 events. 135/1409 cut-off events. For 659/697 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8290 event pairs, 72 based on Foata normal form. 1306/2637 useless extension candidates. Maximal degree in co-relation 1010. Up to 199 conditions per place. [2022-07-12 10:16:56,031 INFO L132 encePairwiseOnDemand]: 246/287 looper letters, 6 selfloop transitions, 0 changer transitions 26/245 dead transitions. [2022-07-12 10:16:56,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 245 transitions, 592 flow [2022-07-12 10:16:56,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 519 transitions. [2022-07-12 10:16:56,033 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9041811846689896 [2022-07-12 10:16:56,033 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 519 transitions. [2022-07-12 10:16:56,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 519 transitions. [2022-07-12 10:16:56,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:56,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 519 transitions. [2022-07-12 10:16:56,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,035 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,035 INFO L186 Difference]: Start difference. First operand has 253 places, 287 transitions, 652 flow. Second operand 2 states and 519 transitions. [2022-07-12 10:16:56,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 245 transitions, 592 flow [2022-07-12 10:16:56,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 245 transitions, 592 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:56,039 INFO L242 Difference]: Finished difference. Result has 253 places, 219 transitions, 498 flow [2022-07-12 10:16:56,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=498, PETRI_PLACES=253, PETRI_TRANSITIONS=219} [2022-07-12 10:16:56,040 INFO L279 CegarLoopForPetriNet]: 253 programPoint places, 0 predicate places. [2022-07-12 10:16:56,040 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 219 transitions, 498 flow [2022-07-12 10:16:56,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 233.5) internal successors, (467), 2 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,041 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:56,041 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:56,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:16:56,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:56,041 INFO L85 PathProgramCache]: Analyzing trace with hash 878298084, now seen corresponding path program 1 times [2022-07-12 10:16:56,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:56,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474910021] [2022-07-12 10:16:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:56,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:56,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474910021] [2022-07-12 10:16:56,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474910021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:56,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:56,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469103618] [2022-07-12 10:16:56,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:56,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:56,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 287 [2022-07-12 10:16:56,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 219 transitions, 498 flow. Second operand has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:56,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 287 [2022-07-12 10:16:56,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:56,108 INFO L129 PetriNetUnfolder]: 0/328 cut-off events. [2022-07-12 10:16:56,108 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:16:56,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 328 events. 0/328 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 919 event pairs, 0 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-12 10:16:56,109 INFO L132 encePairwiseOnDemand]: 284/287 looper letters, 15 selfloop transitions, 2 changer transitions 0/223 dead transitions. [2022-07-12 10:16:56,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 223 transitions, 540 flow [2022-07-12 10:16:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2022-07-12 10:16:56,111 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8083623693379791 [2022-07-12 10:16:56,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2022-07-12 10:16:56,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2022-07-12 10:16:56,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:56,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2022-07-12 10:16:56,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,114 INFO L186 Difference]: Start difference. First operand has 253 places, 219 transitions, 498 flow. Second operand 3 states and 696 transitions. [2022-07-12 10:16:56,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 223 transitions, 540 flow [2022-07-12 10:16:56,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 223 transitions, 510 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:56,117 INFO L242 Difference]: Finished difference. Result has 236 places, 220 transitions, 480 flow [2022-07-12 10:16:56,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=480, PETRI_PLACES=236, PETRI_TRANSITIONS=220} [2022-07-12 10:16:56,118 INFO L279 CegarLoopForPetriNet]: 253 programPoint places, -17 predicate places. [2022-07-12 10:16:56,118 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 220 transitions, 480 flow [2022-07-12 10:16:56,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,118 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:56,118 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:56,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 10:16:56,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:56,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1650337047, now seen corresponding path program 1 times [2022-07-12 10:16:56,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:56,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098064233] [2022-07-12 10:16:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:56,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:56,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098064233] [2022-07-12 10:16:56,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098064233] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:56,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495993908] [2022-07-12 10:16:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:56,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:56,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:56,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:56,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:16:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495993908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:56,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:56,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:56,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644348680] [2022-07-12 10:16:56,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:56,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:56,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:56,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:56,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:56,277 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 287 [2022-07-12 10:16:56,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 220 transitions, 480 flow. Second operand has 10 states, 10 states have (on average 227.3) internal successors, (2273), 10 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:56,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 287 [2022-07-12 10:16:56,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:56,356 INFO L129 PetriNetUnfolder]: 0/304 cut-off events. [2022-07-12 10:16:56,356 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:16:56,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 304 events. 0/304 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 779 event pairs, 0 based on Foata normal form. 2/306 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-12 10:16:56,357 INFO L132 encePairwiseOnDemand]: 281/287 looper letters, 16 selfloop transitions, 9 changer transitions 0/230 dead transitions. [2022-07-12 10:16:56,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 230 transitions, 552 flow [2022-07-12 10:16:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2052 transitions. [2022-07-12 10:16:56,362 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.794425087108014 [2022-07-12 10:16:56,362 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2052 transitions. [2022-07-12 10:16:56,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2052 transitions. [2022-07-12 10:16:56,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:56,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2052 transitions. [2022-07-12 10:16:56,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 287.0) internal successors, (2870), 10 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,369 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 287.0) internal successors, (2870), 10 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,369 INFO L186 Difference]: Start difference. First operand has 236 places, 220 transitions, 480 flow. Second operand 9 states and 2052 transitions. [2022-07-12 10:16:56,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 230 transitions, 552 flow [2022-07-12 10:16:56,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 230 transitions, 550 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:56,373 INFO L242 Difference]: Finished difference. Result has 246 places, 226 transitions, 528 flow [2022-07-12 10:16:56,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=246, PETRI_TRANSITIONS=226} [2022-07-12 10:16:56,373 INFO L279 CegarLoopForPetriNet]: 253 programPoint places, -7 predicate places. [2022-07-12 10:16:56,373 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 226 transitions, 528 flow [2022-07-12 10:16:56,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 227.3) internal successors, (2273), 10 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:56,374 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:56,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:56,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:56,600 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash -306651696, now seen corresponding path program 1 times [2022-07-12 10:16:56,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:56,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040222475] [2022-07-12 10:16:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:56,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:56,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040222475] [2022-07-12 10:16:56,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040222475] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:56,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566431380] [2022-07-12 10:16:56,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:56,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:56,641 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:56,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:16:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:56,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:56,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566431380] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:56,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:56,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:56,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855348258] [2022-07-12 10:16:56,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:56,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:56,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:56,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 287 [2022-07-12 10:16:56,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 226 transitions, 528 flow. Second operand has 18 states, 18 states have (on average 227.61111111111111) internal successors, (4097), 18 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:56,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 287 [2022-07-12 10:16:56,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:57,000 INFO L129 PetriNetUnfolder]: 0/256 cut-off events. [2022-07-12 10:16:57,000 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:16:57,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 256 events. 0/256 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/260 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-12 10:16:57,001 INFO L132 encePairwiseOnDemand]: 282/287 looper letters, 21 selfloop transitions, 19 changer transitions 0/234 dead transitions. [2022-07-12 10:16:57,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 234 transitions, 664 flow [2022-07-12 10:16:57,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:57,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4769 transitions. [2022-07-12 10:16:57,004 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7912726066036171 [2022-07-12 10:16:57,004 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4769 transitions. [2022-07-12 10:16:57,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4769 transitions. [2022-07-12 10:16:57,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:57,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4769 transitions. [2022-07-12 10:16:57,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 227.0952380952381) internal successors, (4769), 21 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,016 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,016 INFO L186 Difference]: Start difference. First operand has 246 places, 226 transitions, 528 flow. Second operand 21 states and 4769 transitions. [2022-07-12 10:16:57,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 234 transitions, 664 flow [2022-07-12 10:16:57,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 234 transitions, 639 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-12 10:16:57,020 INFO L242 Difference]: Finished difference. Result has 250 places, 223 transitions, 562 flow [2022-07-12 10:16:57,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=562, PETRI_PLACES=250, PETRI_TRANSITIONS=223} [2022-07-12 10:16:57,020 INFO L279 CegarLoopForPetriNet]: 253 programPoint places, -3 predicate places. [2022-07-12 10:16:57,021 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 223 transitions, 562 flow [2022-07-12 10:16:57,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 227.61111111111111) internal successors, (4097), 18 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,021 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:57,022 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:57,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 10:16:57,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-12 10:16:57,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:57,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:57,235 INFO L85 PathProgramCache]: Analyzing trace with hash 727495015, now seen corresponding path program 1 times [2022-07-12 10:16:57,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:57,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866204821] [2022-07-12 10:16:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:57,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:57,248 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:57,263 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:57,263 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:57,263 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:57,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:57,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-12 10:16:57,264 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:57,264 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:57,264 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-12 10:16:57,280 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-12 10:16:57,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 282 places, 321 transitions, 740 flow [2022-07-12 10:16:57,664 INFO L129 PetriNetUnfolder]: 530/2762 cut-off events. [2022-07-12 10:16:57,664 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-12 10:16:57,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 2762 events. 530/2762 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 18539 event pairs, 201 based on Foata normal form. 0/2416 useless extension candidates. Maximal degree in co-relation 1762. Up to 448 conditions per place. [2022-07-12 10:16:57,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 321 transitions, 740 flow [2022-07-12 10:16:57,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 321 transitions, 740 flow [2022-07-12 10:16:57,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:57,726 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f1ece0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec41ac0 [2022-07-12 10:16:57,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:57,729 INFO L129 PetriNetUnfolder]: 5/87 cut-off events. [2022-07-12 10:16:57,730 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:57,730 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:57,730 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:57,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:57,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:57,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1331672858, now seen corresponding path program 1 times [2022-07-12 10:16:57,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:57,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966199396] [2022-07-12 10:16:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:57,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:57,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:57,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966199396] [2022-07-12 10:16:57,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966199396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:57,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:57,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:57,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082659564] [2022-07-12 10:16:57,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:57,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:57,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:57,744 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 321 [2022-07-12 10:16:57,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 321 transitions, 740 flow. Second operand has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:57,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 321 [2022-07-12 10:16:57,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:58,172 INFO L129 PetriNetUnfolder]: 328/2552 cut-off events. [2022-07-12 10:16:58,173 INFO L130 PetriNetUnfolder]: For 1453/1481 co-relation queries the response was YES. [2022-07-12 10:16:58,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 2552 events. 328/2552 cut-off events. For 1453/1481 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18097 event pairs, 201 based on Foata normal form. 2940/5348 useless extension candidates. Maximal degree in co-relation 1825. Up to 456 conditions per place. [2022-07-12 10:16:58,190 INFO L132 encePairwiseOnDemand]: 274/321 looper letters, 7 selfloop transitions, 0 changer transitions 27/273 dead transitions. [2022-07-12 10:16:58,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 273 transitions, 672 flow [2022-07-12 10:16:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 579 transitions. [2022-07-12 10:16:58,191 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9018691588785047 [2022-07-12 10:16:58,192 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 579 transitions. [2022-07-12 10:16:58,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 579 transitions. [2022-07-12 10:16:58,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:58,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 579 transitions. [2022-07-12 10:16:58,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 289.5) internal successors, (579), 2 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,193 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,193 INFO L186 Difference]: Start difference. First operand has 282 places, 321 transitions, 740 flow. Second operand 2 states and 579 transitions. [2022-07-12 10:16:58,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 273 transitions, 672 flow [2022-07-12 10:16:58,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 273 transitions, 672 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:58,197 INFO L242 Difference]: Finished difference. Result has 282 places, 246 transitions, 569 flow [2022-07-12 10:16:58,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=569, PETRI_PLACES=282, PETRI_TRANSITIONS=246} [2022-07-12 10:16:58,198 INFO L279 CegarLoopForPetriNet]: 282 programPoint places, 0 predicate places. [2022-07-12 10:16:58,198 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 246 transitions, 569 flow [2022-07-12 10:16:58,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,198 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:58,198 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:58,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-12 10:16:58,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:58,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1202590139, now seen corresponding path program 1 times [2022-07-12 10:16:58,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:58,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505486959] [2022-07-12 10:16:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:58,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:58,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:58,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505486959] [2022-07-12 10:16:58,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505486959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:58,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:58,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:58,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634216949] [2022-07-12 10:16:58,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:58,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:58,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:58,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:58,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:58,214 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 321 [2022-07-12 10:16:58,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 246 transitions, 569 flow. Second operand has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:58,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 321 [2022-07-12 10:16:58,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:58,273 INFO L129 PetriNetUnfolder]: 0/376 cut-off events. [2022-07-12 10:16:58,273 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-12 10:16:58,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 376 events. 0/376 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1096 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-12 10:16:58,274 INFO L132 encePairwiseOnDemand]: 318/321 looper letters, 16 selfloop transitions, 2 changer transitions 0/250 dead transitions. [2022-07-12 10:16:58,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 250 transitions, 613 flow [2022-07-12 10:16:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2022-07-12 10:16:58,275 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8047767393561787 [2022-07-12 10:16:58,276 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2022-07-12 10:16:58,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2022-07-12 10:16:58,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:58,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2022-07-12 10:16:58,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,278 INFO L186 Difference]: Start difference. First operand has 282 places, 246 transitions, 569 flow. Second operand 3 states and 775 transitions. [2022-07-12 10:16:58,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 250 transitions, 613 flow [2022-07-12 10:16:58,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 250 transitions, 571 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:58,282 INFO L242 Difference]: Finished difference. Result has 265 places, 247 transitions, 539 flow [2022-07-12 10:16:58,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=539, PETRI_PLACES=265, PETRI_TRANSITIONS=247} [2022-07-12 10:16:58,282 INFO L279 CegarLoopForPetriNet]: 282 programPoint places, -17 predicate places. [2022-07-12 10:16:58,282 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 247 transitions, 539 flow [2022-07-12 10:16:58,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,283 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:58,283 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:58,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-12 10:16:58,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:58,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:58,284 INFO L85 PathProgramCache]: Analyzing trace with hash 331807882, now seen corresponding path program 1 times [2022-07-12 10:16:58,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:58,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036580777] [2022-07-12 10:16:58,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:58,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:58,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:58,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036580777] [2022-07-12 10:16:58,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036580777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666362937] [2022-07-12 10:16:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:58,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:58,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:58,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:58,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:16:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:58,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:58,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:58,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:58,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666362937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:58,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:58,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:58,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734447031] [2022-07-12 10:16:58,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:58,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:58,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:58,474 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 321 [2022-07-12 10:16:58,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 247 transitions, 539 flow. Second operand has 10 states, 10 states have (on average 253.3) internal successors, (2533), 10 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:58,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 321 [2022-07-12 10:16:58,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:58,557 INFO L129 PetriNetUnfolder]: 0/352 cut-off events. [2022-07-12 10:16:58,558 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-12 10:16:58,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 352 events. 0/352 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 952 event pairs, 0 based on Foata normal form. 2/354 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-12 10:16:58,559 INFO L132 encePairwiseOnDemand]: 315/321 looper letters, 17 selfloop transitions, 9 changer transitions 0/257 dead transitions. [2022-07-12 10:16:58,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 257 transitions, 613 flow [2022-07-12 10:16:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2287 transitions. [2022-07-12 10:16:58,562 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916233991000347 [2022-07-12 10:16:58,562 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2287 transitions. [2022-07-12 10:16:58,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2287 transitions. [2022-07-12 10:16:58,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:58,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2287 transitions. [2022-07-12 10:16:58,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 254.11111111111111) internal successors, (2287), 9 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,568 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,568 INFO L186 Difference]: Start difference. First operand has 265 places, 247 transitions, 539 flow. Second operand 9 states and 2287 transitions. [2022-07-12 10:16:58,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 257 transitions, 613 flow [2022-07-12 10:16:58,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 257 transitions, 611 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:58,572 INFO L242 Difference]: Finished difference. Result has 275 places, 253 transitions, 587 flow [2022-07-12 10:16:58,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=587, PETRI_PLACES=275, PETRI_TRANSITIONS=253} [2022-07-12 10:16:58,573 INFO L279 CegarLoopForPetriNet]: 282 programPoint places, -7 predicate places. [2022-07-12 10:16:58,573 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 253 transitions, 587 flow [2022-07-12 10:16:58,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 253.3) internal successors, (2533), 10 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,573 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:58,574 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:58,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:58,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 10:16:58,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:58,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1341636081, now seen corresponding path program 1 times [2022-07-12 10:16:58,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:58,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54260614] [2022-07-12 10:16:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:58,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:58,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:58,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54260614] [2022-07-12 10:16:58,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54260614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:58,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579116423] [2022-07-12 10:16:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:58,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:58,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:58,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:58,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:16:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:58,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:58,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:58,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:59,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579116423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:59,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:59,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:59,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621602081] [2022-07-12 10:16:59,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:59,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:59,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:59,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:59,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:59,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 321 [2022-07-12 10:16:59,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 253 transitions, 587 flow. Second operand has 18 states, 18 states have (on average 253.61111111111111) internal successors, (4565), 18 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:59,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 321 [2022-07-12 10:16:59,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:59,241 INFO L129 PetriNetUnfolder]: 0/304 cut-off events. [2022-07-12 10:16:59,241 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-12 10:16:59,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 304 events. 0/304 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 637 event pairs, 0 based on Foata normal form. 4/308 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-12 10:16:59,242 INFO L132 encePairwiseOnDemand]: 315/321 looper letters, 25 selfloop transitions, 21 changer transitions 0/277 dead transitions. [2022-07-12 10:16:59,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 277 transitions, 787 flow [2022-07-12 10:16:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5321 transitions. [2022-07-12 10:16:59,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7893487613113781 [2022-07-12 10:16:59,246 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5321 transitions. [2022-07-12 10:16:59,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5321 transitions. [2022-07-12 10:16:59,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:59,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5321 transitions. [2022-07-12 10:16:59,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 253.38095238095238) internal successors, (5321), 21 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,259 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,260 INFO L186 Difference]: Start difference. First operand has 275 places, 253 transitions, 587 flow. Second operand 21 states and 5321 transitions. [2022-07-12 10:16:59,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 277 transitions, 787 flow [2022-07-12 10:16:59,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 277 transitions, 773 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:59,264 INFO L242 Difference]: Finished difference. Result has 299 places, 266 transitions, 711 flow [2022-07-12 10:16:59,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=711, PETRI_PLACES=299, PETRI_TRANSITIONS=266} [2022-07-12 10:16:59,266 INFO L279 CegarLoopForPetriNet]: 282 programPoint places, 17 predicate places. [2022-07-12 10:16:59,266 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 266 transitions, 711 flow [2022-07-12 10:16:59,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 253.61111111111111) internal successors, (4565), 18 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,267 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:59,267 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:59,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:59,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 10:16:59,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:59,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1703140056, now seen corresponding path program 1 times [2022-07-12 10:16:59,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:59,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561878078] [2022-07-12 10:16:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:59,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:59,500 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:59,532 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:59,533 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:59,533 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:59,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:59,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-12 10:16:59,534 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:59,534 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:59,534 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-12 10:16:59,557 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-12 10:16:59,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 311 places, 355 transitions, 830 flow [2022-07-12 10:17:00,432 INFO L129 PetriNetUnfolder]: 1117/5196 cut-off events. [2022-07-12 10:17:00,433 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-12 10:17:00,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6281 conditions, 5196 events. 1117/5196 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 41677 event pairs, 522 based on Foata normal form. 0/4582 useless extension candidates. Maximal degree in co-relation 3244. Up to 1024 conditions per place. [2022-07-12 10:17:00,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 355 transitions, 830 flow [2022-07-12 10:17:00,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 311 places, 355 transitions, 830 flow [2022-07-12 10:17:00,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:00,545 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f1ece0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec41ac0 [2022-07-12 10:17:00,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:00,548 INFO L129 PetriNetUnfolder]: 6/92 cut-off events. [2022-07-12 10:17:00,548 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:00,548 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:00,548 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:00,548 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:00,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash -595715671, now seen corresponding path program 1 times [2022-07-12 10:17:00,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:00,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551286247] [2022-07-12 10:17:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:00,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:00,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551286247] [2022-07-12 10:17:00,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551286247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:00,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:00,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47202022] [2022-07-12 10:17:00,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:00,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:00,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:00,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:00,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:00,561 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 355 [2022-07-12 10:17:00,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 355 transitions, 830 flow. Second operand has 2 states, 2 states have (on average 285.5) internal successors, (571), 2 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:00,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 355 [2022-07-12 10:17:00,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:01,540 INFO L129 PetriNetUnfolder]: 777/4847 cut-off events. [2022-07-12 10:17:01,540 INFO L130 PetriNetUnfolder]: For 3234/3284 co-relation queries the response was YES. [2022-07-12 10:17:01,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6965 conditions, 4847 events. 777/4847 cut-off events. For 3234/3284 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40419 event pairs, 522 based on Foata normal form. 6564/11137 useless extension candidates. Maximal degree in co-relation 3489. Up to 1033 conditions per place. [2022-07-12 10:17:01,588 INFO L132 encePairwiseOnDemand]: 302/355 looper letters, 8 selfloop transitions, 0 changer transitions 28/301 dead transitions. [2022-07-12 10:17:01,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 301 transitions, 754 flow [2022-07-12 10:17:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 639 transitions. [2022-07-12 10:17:01,589 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-12 10:17:01,589 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 639 transitions. [2022-07-12 10:17:01,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 639 transitions. [2022-07-12 10:17:01,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:01,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 639 transitions. [2022-07-12 10:17:01,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 319.5) internal successors, (639), 2 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,591 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,591 INFO L186 Difference]: Start difference. First operand has 311 places, 355 transitions, 830 flow. Second operand 2 states and 639 transitions. [2022-07-12 10:17:01,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 301 transitions, 754 flow [2022-07-12 10:17:01,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 301 transitions, 754 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:01,596 INFO L242 Difference]: Finished difference. Result has 311 places, 273 transitions, 642 flow [2022-07-12 10:17:01,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=642, PETRI_PLACES=311, PETRI_TRANSITIONS=273} [2022-07-12 10:17:01,597 INFO L279 CegarLoopForPetriNet]: 311 programPoint places, 0 predicate places. [2022-07-12 10:17:01,597 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 273 transitions, 642 flow [2022-07-12 10:17:01,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 285.5) internal successors, (571), 2 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,597 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:01,597 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:01,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-12 10:17:01,598 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:01,598 INFO L85 PathProgramCache]: Analyzing trace with hash -466632952, now seen corresponding path program 1 times [2022-07-12 10:17:01,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:01,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206438904] [2022-07-12 10:17:01,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:01,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206438904] [2022-07-12 10:17:01,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206438904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:01,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:01,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:01,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752091163] [2022-07-12 10:17:01,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:01,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:01,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:01,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:01,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:01,612 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 355 [2022-07-12 10:17:01,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 273 transitions, 642 flow. Second operand has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:01,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 355 [2022-07-12 10:17:01,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:01,679 INFO L129 PetriNetUnfolder]: 0/424 cut-off events. [2022-07-12 10:17:01,679 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-12 10:17:01,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 424 events. 0/424 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1274 event pairs, 0 based on Foata normal form. 0/416 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-12 10:17:01,681 INFO L132 encePairwiseOnDemand]: 352/355 looper letters, 17 selfloop transitions, 2 changer transitions 0/277 dead transitions. [2022-07-12 10:17:01,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 277 transitions, 688 flow [2022-07-12 10:17:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 854 transitions. [2022-07-12 10:17:01,683 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8018779342723005 [2022-07-12 10:17:01,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 854 transitions. [2022-07-12 10:17:01,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 854 transitions. [2022-07-12 10:17:01,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:01,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 854 transitions. [2022-07-12 10:17:01,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,686 INFO L186 Difference]: Start difference. First operand has 311 places, 273 transitions, 642 flow. Second operand 3 states and 854 transitions. [2022-07-12 10:17:01,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 277 transitions, 688 flow [2022-07-12 10:17:01,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 277 transitions, 632 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:01,690 INFO L242 Difference]: Finished difference. Result has 294 places, 274 transitions, 598 flow [2022-07-12 10:17:01,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=598, PETRI_PLACES=294, PETRI_TRANSITIONS=274} [2022-07-12 10:17:01,691 INFO L279 CegarLoopForPetriNet]: 311 programPoint places, -17 predicate places. [2022-07-12 10:17:01,691 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 274 transitions, 598 flow [2022-07-12 10:17:01,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,691 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:01,691 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:01,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-12 10:17:01,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:01,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash -733075635, now seen corresponding path program 1 times [2022-07-12 10:17:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:01,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11055148] [2022-07-12 10:17:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:01,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11055148] [2022-07-12 10:17:01,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11055148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:01,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472634623] [2022-07-12 10:17:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:01,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:01,719 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:01,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:17:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:01,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:01,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472634623] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:01,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:01,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:01,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000352101] [2022-07-12 10:17:01,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:01,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:01,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:01,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:01,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:01,873 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 355 [2022-07-12 10:17:01,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 274 transitions, 598 flow. Second operand has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:01,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 355 [2022-07-12 10:17:01,874 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:02,032 INFO L129 PetriNetUnfolder]: 0/400 cut-off events. [2022-07-12 10:17:02,032 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:17:02,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 400 events. 0/400 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1132 event pairs, 0 based on Foata normal form. 2/402 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-12 10:17:02,033 INFO L132 encePairwiseOnDemand]: 349/355 looper letters, 18 selfloop transitions, 9 changer transitions 0/284 dead transitions. [2022-07-12 10:17:02,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 284 transitions, 674 flow [2022-07-12 10:17:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:02,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2522 transitions. [2022-07-12 10:17:02,035 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.789358372456964 [2022-07-12 10:17:02,035 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2522 transitions. [2022-07-12 10:17:02,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2522 transitions. [2022-07-12 10:17:02,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:02,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2522 transitions. [2022-07-12 10:17:02,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 280.22222222222223) internal successors, (2522), 9 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,040 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,041 INFO L186 Difference]: Start difference. First operand has 294 places, 274 transitions, 598 flow. Second operand 9 states and 2522 transitions. [2022-07-12 10:17:02,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 284 transitions, 674 flow [2022-07-12 10:17:02,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 284 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:02,044 INFO L242 Difference]: Finished difference. Result has 304 places, 280 transitions, 646 flow [2022-07-12 10:17:02,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=646, PETRI_PLACES=304, PETRI_TRANSITIONS=280} [2022-07-12 10:17:02,045 INFO L279 CegarLoopForPetriNet]: 311 programPoint places, -7 predicate places. [2022-07-12 10:17:02,045 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 280 transitions, 646 flow [2022-07-12 10:17:02,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,046 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:02,046 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:02,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:02,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-12 10:17:02,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:02,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2033720500, now seen corresponding path program 1 times [2022-07-12 10:17:02,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:02,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198585278] [2022-07-12 10:17:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:02,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:02,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:02,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198585278] [2022-07-12 10:17:02,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198585278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:02,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539479886] [2022-07-12 10:17:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:02,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:02,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:02,310 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:02,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:17:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:02,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:02,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:02,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539479886] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:02,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:02,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:02,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348851094] [2022-07-12 10:17:02,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:02,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:02,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:02,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:02,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:02,507 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 355 [2022-07-12 10:17:02,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 280 transitions, 646 flow. Second operand has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:02,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 355 [2022-07-12 10:17:02,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:02,675 INFO L129 PetriNetUnfolder]: 0/352 cut-off events. [2022-07-12 10:17:02,675 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-12 10:17:02,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 352 events. 0/352 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 814 event pairs, 0 based on Foata normal form. 4/356 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-12 10:17:02,676 INFO L132 encePairwiseOnDemand]: 349/355 looper letters, 26 selfloop transitions, 21 changer transitions 0/304 dead transitions. [2022-07-12 10:17:02,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 304 transitions, 848 flow [2022-07-12 10:17:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5868 transitions. [2022-07-12 10:17:02,679 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.787122736418511 [2022-07-12 10:17:02,679 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5868 transitions. [2022-07-12 10:17:02,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5868 transitions. [2022-07-12 10:17:02,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:02,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5868 transitions. [2022-07-12 10:17:02,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 279.42857142857144) internal successors, (5868), 21 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,689 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,690 INFO L186 Difference]: Start difference. First operand has 304 places, 280 transitions, 646 flow. Second operand 21 states and 5868 transitions. [2022-07-12 10:17:02,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 304 transitions, 848 flow [2022-07-12 10:17:02,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 304 transitions, 834 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:02,694 INFO L242 Difference]: Finished difference. Result has 328 places, 293 transitions, 770 flow [2022-07-12 10:17:02,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=770, PETRI_PLACES=328, PETRI_TRANSITIONS=293} [2022-07-12 10:17:02,695 INFO L279 CegarLoopForPetriNet]: 311 programPoint places, 17 predicate places. [2022-07-12 10:17:02,695 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 293 transitions, 770 flow [2022-07-12 10:17:02,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,696 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:02,696 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:02,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:02,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-12 10:17:02,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:02,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1251426826, now seen corresponding path program 1 times [2022-07-12 10:17:02,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:02,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050474859] [2022-07-12 10:17:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:02,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:03,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:03,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050474859] [2022-07-12 10:17:03,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050474859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:03,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579994151] [2022-07-12 10:17:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:03,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:03,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:03,056 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:03,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:17:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:03,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:03,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:03,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:03,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579994151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:03,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:03,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:03,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207420967] [2022-07-12 10:17:03,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:03,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:03,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:03,516 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 355 [2022-07-12 10:17:03,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 293 transitions, 770 flow. Second operand has 34 states, 34 states have (on average 279.79411764705884) internal successors, (9513), 34 states have internal predecessors, (9513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:03,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 355 [2022-07-12 10:17:03,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:03,758 INFO L129 PetriNetUnfolder]: 0/328 cut-off events. [2022-07-12 10:17:03,758 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-12 10:17:03,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 328 events. 0/328 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/330 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-12 10:17:03,761 INFO L132 encePairwiseOnDemand]: 350/355 looper letters, 27 selfloop transitions, 25 changer transitions 0/298 dead transitions. [2022-07-12 10:17:03,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 298 transitions, 916 flow [2022-07-12 10:17:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:17:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-12 10:17:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7533 transitions. [2022-07-12 10:17:03,765 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7859154929577464 [2022-07-12 10:17:03,765 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7533 transitions. [2022-07-12 10:17:03,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7533 transitions. [2022-07-12 10:17:03,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:03,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7533 transitions. [2022-07-12 10:17:03,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 279.0) internal successors, (7533), 27 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 355.0) internal successors, (9940), 28 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,779 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 355.0) internal successors, (9940), 28 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,779 INFO L186 Difference]: Start difference. First operand has 328 places, 293 transitions, 770 flow. Second operand 27 states and 7533 transitions. [2022-07-12 10:17:03,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 298 transitions, 916 flow [2022-07-12 10:17:03,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 298 transitions, 862 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-12 10:17:03,784 INFO L242 Difference]: Finished difference. Result has 329 places, 284 transitions, 755 flow [2022-07-12 10:17:03,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=755, PETRI_PLACES=329, PETRI_TRANSITIONS=284} [2022-07-12 10:17:03,784 INFO L279 CegarLoopForPetriNet]: 311 programPoint places, 18 predicate places. [2022-07-12 10:17:03,785 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 284 transitions, 755 flow [2022-07-12 10:17:03,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 279.79411764705884) internal successors, (9513), 34 states have internal predecessors, (9513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,786 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:03,786 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:03,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:04,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-12 10:17:04,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:04,004 INFO L85 PathProgramCache]: Analyzing trace with hash 681592554, now seen corresponding path program 1 times [2022-07-12 10:17:04,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:04,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334173058] [2022-07-12 10:17:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:04,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:04,019 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:04,037 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:04,038 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:04,038 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:04,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:04,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-12 10:17:04,039 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:17:04,040 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:04,040 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-12 10:17:04,065 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-12 10:17:04,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 340 places, 389 transitions, 922 flow [2022-07-12 10:17:05,943 INFO L129 PetriNetUnfolder]: 2408/10126 cut-off events. [2022-07-12 10:17:05,944 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-12 10:17:06,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12503 conditions, 10126 events. 2408/10126 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 93818 event pairs, 1291 based on Foata normal form. 0/8988 useless extension candidates. Maximal degree in co-relation 6263. Up to 2304 conditions per place. [2022-07-12 10:17:06,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 340 places, 389 transitions, 922 flow [2022-07-12 10:17:06,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 340 places, 389 transitions, 922 flow [2022-07-12 10:17:06,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:06,200 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f1ece0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec41ac0 [2022-07-12 10:17:06,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:06,203 INFO L129 PetriNetUnfolder]: 6/93 cut-off events. [2022-07-12 10:17:06,203 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:06,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:06,204 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:06,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1337880370, now seen corresponding path program 1 times [2022-07-12 10:17:06,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:06,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51136192] [2022-07-12 10:17:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:06,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51136192] [2022-07-12 10:17:06,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51136192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:06,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:06,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:06,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818808942] [2022-07-12 10:17:06,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:06,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:06,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:06,215 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 389 [2022-07-12 10:17:06,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 389 transitions, 922 flow. Second operand has 2 states, 2 states have (on average 311.5) internal successors, (623), 2 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:06,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 389 [2022-07-12 10:17:06,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:08,258 INFO L129 PetriNetUnfolder]: 1802/9510 cut-off events. [2022-07-12 10:17:08,258 INFO L130 PetriNetUnfolder]: For 7122/7170 co-relation queries the response was YES. [2022-07-12 10:17:08,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14201 conditions, 9510 events. 1802/9510 cut-off events. For 7122/7170 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 91573 event pairs, 1291 based on Foata normal form. 14546/23524 useless extension candidates. Maximal degree in co-relation 6946. Up to 2314 conditions per place. [2022-07-12 10:17:08,362 INFO L132 encePairwiseOnDemand]: 330/389 looper letters, 9 selfloop transitions, 0 changer transitions 29/329 dead transitions. [2022-07-12 10:17:08,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 329 transitions, 838 flow [2022-07-12 10:17:08,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 699 transitions. [2022-07-12 10:17:08,364 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8984575835475579 [2022-07-12 10:17:08,364 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 699 transitions. [2022-07-12 10:17:08,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 699 transitions. [2022-07-12 10:17:08,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:08,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 699 transitions. [2022-07-12 10:17:08,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,366 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,366 INFO L186 Difference]: Start difference. First operand has 340 places, 389 transitions, 922 flow. Second operand 2 states and 699 transitions. [2022-07-12 10:17:08,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 329 transitions, 838 flow [2022-07-12 10:17:08,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 329 transitions, 838 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:08,372 INFO L242 Difference]: Finished difference. Result has 340 places, 300 transitions, 717 flow [2022-07-12 10:17:08,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=717, PETRI_PLACES=340, PETRI_TRANSITIONS=300} [2022-07-12 10:17:08,373 INFO L279 CegarLoopForPetriNet]: 340 programPoint places, 0 predicate places. [2022-07-12 10:17:08,373 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 300 transitions, 717 flow [2022-07-12 10:17:08,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 311.5) internal successors, (623), 2 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,373 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:08,373 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:08,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-12 10:17:08,374 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:08,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:08,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1208797651, now seen corresponding path program 1 times [2022-07-12 10:17:08,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:08,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467426603] [2022-07-12 10:17:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:08,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:08,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:08,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467426603] [2022-07-12 10:17:08,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467426603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:08,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:08,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:08,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883133763] [2022-07-12 10:17:08,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:08,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:08,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:08,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:08,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:08,389 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 389 [2022-07-12 10:17:08,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 300 transitions, 717 flow. Second operand has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:08,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 389 [2022-07-12 10:17:08,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:08,595 INFO L129 PetriNetUnfolder]: 0/472 cut-off events. [2022-07-12 10:17:08,596 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-12 10:17:08,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 472 events. 0/472 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1450 event pairs, 0 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-12 10:17:08,598 INFO L132 encePairwiseOnDemand]: 386/389 looper letters, 18 selfloop transitions, 2 changer transitions 0/304 dead transitions. [2022-07-12 10:17:08,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 304 transitions, 765 flow [2022-07-12 10:17:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 933 transitions. [2022-07-12 10:17:08,600 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7994858611825193 [2022-07-12 10:17:08,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 933 transitions. [2022-07-12 10:17:08,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 933 transitions. [2022-07-12 10:17:08,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:08,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 933 transitions. [2022-07-12 10:17:08,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,603 INFO L186 Difference]: Start difference. First operand has 340 places, 300 transitions, 717 flow. Second operand 3 states and 933 transitions. [2022-07-12 10:17:08,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 304 transitions, 765 flow [2022-07-12 10:17:08,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 304 transitions, 693 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:08,608 INFO L242 Difference]: Finished difference. Result has 323 places, 301 transitions, 657 flow [2022-07-12 10:17:08,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=657, PETRI_PLACES=323, PETRI_TRANSITIONS=301} [2022-07-12 10:17:08,609 INFO L279 CegarLoopForPetriNet]: 340 programPoint places, -17 predicate places. [2022-07-12 10:17:08,610 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 301 transitions, 657 flow [2022-07-12 10:17:08,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,610 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:08,610 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:08,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-12 10:17:08,610 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash -550020302, now seen corresponding path program 1 times [2022-07-12 10:17:08,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:08,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425736017] [2022-07-12 10:17:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:08,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:08,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:08,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425736017] [2022-07-12 10:17:08,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425736017] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:08,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911146282] [2022-07-12 10:17:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:08,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:08,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:08,634 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:08,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:17:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:08,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:08,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:08,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:08,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911146282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:08,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:08,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:08,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394897426] [2022-07-12 10:17:08,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:08,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:08,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:08,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:08,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:08,788 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 389 [2022-07-12 10:17:08,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 301 transitions, 657 flow. Second operand has 10 states, 10 states have (on average 305.3) internal successors, (3053), 10 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:08,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 389 [2022-07-12 10:17:08,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:08,901 INFO L129 PetriNetUnfolder]: 0/448 cut-off events. [2022-07-12 10:17:08,901 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-12 10:17:08,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 448 events. 0/448 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1307 event pairs, 0 based on Foata normal form. 2/450 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-12 10:17:08,902 INFO L132 encePairwiseOnDemand]: 383/389 looper letters, 19 selfloop transitions, 9 changer transitions 0/311 dead transitions. [2022-07-12 10:17:08,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 311 transitions, 735 flow [2022-07-12 10:17:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2757 transitions. [2022-07-12 10:17:08,904 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7874892887746359 [2022-07-12 10:17:08,904 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2757 transitions. [2022-07-12 10:17:08,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2757 transitions. [2022-07-12 10:17:08,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:08,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2757 transitions. [2022-07-12 10:17:08,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 306.3333333333333) internal successors, (2757), 9 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 389.0) internal successors, (3890), 10 states have internal predecessors, (3890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,910 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 389.0) internal successors, (3890), 10 states have internal predecessors, (3890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,911 INFO L186 Difference]: Start difference. First operand has 323 places, 301 transitions, 657 flow. Second operand 9 states and 2757 transitions. [2022-07-12 10:17:08,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 311 transitions, 735 flow [2022-07-12 10:17:08,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 311 transitions, 733 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:08,915 INFO L242 Difference]: Finished difference. Result has 333 places, 307 transitions, 705 flow [2022-07-12 10:17:08,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=705, PETRI_PLACES=333, PETRI_TRANSITIONS=307} [2022-07-12 10:17:08,915 INFO L279 CegarLoopForPetriNet]: 340 programPoint places, -7 predicate places. [2022-07-12 10:17:08,915 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 307 transitions, 705 flow [2022-07-12 10:17:08,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 305.3) internal successors, (3053), 10 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:08,916 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:08,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:09,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:09,131 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:09,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:09,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1769601561, now seen corresponding path program 1 times [2022-07-12 10:17:09,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:09,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454763286] [2022-07-12 10:17:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:09,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:09,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:09,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454763286] [2022-07-12 10:17:09,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454763286] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189219355] [2022-07-12 10:17:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:09,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:09,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:09,181 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:09,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:17:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:09,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:09,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:09,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189219355] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:09,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:09,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:09,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465015900] [2022-07-12 10:17:09,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:09,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:09,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:09,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:09,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:09,396 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 389 [2022-07-12 10:17:09,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 307 transitions, 705 flow. Second operand has 18 states, 18 states have (on average 305.6111111111111) internal successors, (5501), 18 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:09,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:09,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 389 [2022-07-12 10:17:09,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:09,583 INFO L129 PetriNetUnfolder]: 0/400 cut-off events. [2022-07-12 10:17:09,583 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-12 10:17:09,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 400 events. 0/400 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 991 event pairs, 0 based on Foata normal form. 4/404 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-12 10:17:09,584 INFO L132 encePairwiseOnDemand]: 383/389 looper letters, 27 selfloop transitions, 21 changer transitions 0/331 dead transitions. [2022-07-12 10:17:09,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 331 transitions, 909 flow [2022-07-12 10:17:09,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6415 transitions. [2022-07-12 10:17:09,588 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7852858366997184 [2022-07-12 10:17:09,588 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6415 transitions. [2022-07-12 10:17:09,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6415 transitions. [2022-07-12 10:17:09,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:09,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6415 transitions. [2022-07-12 10:17:09,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 305.4761904761905) internal successors, (6415), 21 states have internal predecessors, (6415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:09,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:09,599 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:09,600 INFO L186 Difference]: Start difference. First operand has 333 places, 307 transitions, 705 flow. Second operand 21 states and 6415 transitions. [2022-07-12 10:17:09,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 331 transitions, 909 flow [2022-07-12 10:17:09,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 331 transitions, 895 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:09,604 INFO L242 Difference]: Finished difference. Result has 357 places, 320 transitions, 829 flow [2022-07-12 10:17:09,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=829, PETRI_PLACES=357, PETRI_TRANSITIONS=320} [2022-07-12 10:17:09,605 INFO L279 CegarLoopForPetriNet]: 340 programPoint places, 17 predicate places. [2022-07-12 10:17:09,605 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 320 transitions, 829 flow [2022-07-12 10:17:09,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 305.6111111111111) internal successors, (5501), 18 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:09,606 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:09,606 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:09,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:09,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-12 10:17:09,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1868607067, now seen corresponding path program 1 times [2022-07-12 10:17:09,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:09,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696593107] [2022-07-12 10:17:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:09,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:09,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696593107] [2022-07-12 10:17:09,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696593107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051500490] [2022-07-12 10:17:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:09,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:09,932 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:09,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 10:17:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:10,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:10,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:10,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:10,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051500490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:10,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:10,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:10,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130266254] [2022-07-12 10:17:10,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:10,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:10,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:10,381 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 389 [2022-07-12 10:17:10,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 320 transitions, 829 flow. Second operand has 34 states, 34 states have (on average 305.79411764705884) internal successors, (10397), 34 states have internal predecessors, (10397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:10,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:10,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 389 [2022-07-12 10:17:10,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:10,736 INFO L129 PetriNetUnfolder]: 0/364 cut-off events. [2022-07-12 10:17:10,736 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-12 10:17:10,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 364 events. 0/364 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/367 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-12 10:17:10,737 INFO L132 encePairwiseOnDemand]: 384/389 looper letters, 30 selfloop transitions, 28 changer transitions 0/330 dead transitions. [2022-07-12 10:17:10,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 330 transitions, 1021 flow [2022-07-12 10:17:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 10:17:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-12 10:17:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9151 transitions. [2022-07-12 10:17:10,742 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7841473864610111 [2022-07-12 10:17:10,742 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9151 transitions. [2022-07-12 10:17:10,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9151 transitions. [2022-07-12 10:17:10,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:10,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9151 transitions. [2022-07-12 10:17:10,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 305.03333333333336) internal successors, (9151), 30 states have internal predecessors, (9151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:10,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 389.0) internal successors, (12059), 31 states have internal predecessors, (12059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:10,758 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 389.0) internal successors, (12059), 31 states have internal predecessors, (12059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:10,758 INFO L186 Difference]: Start difference. First operand has 357 places, 320 transitions, 829 flow. Second operand 30 states and 9151 transitions. [2022-07-12 10:17:10,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 330 transitions, 1021 flow [2022-07-12 10:17:10,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 330 transitions, 961 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-12 10:17:10,762 INFO L242 Difference]: Finished difference. Result has 361 places, 314 transitions, 838 flow [2022-07-12 10:17:10,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=838, PETRI_PLACES=361, PETRI_TRANSITIONS=314} [2022-07-12 10:17:10,763 INFO L279 CegarLoopForPetriNet]: 340 programPoint places, 21 predicate places. [2022-07-12 10:17:10,763 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 314 transitions, 838 flow [2022-07-12 10:17:10,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 305.79411764705884) internal successors, (10397), 34 states have internal predecessors, (10397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:10,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:10,764 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:10,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:10,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-12 10:17:10,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:10,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:10,982 INFO L85 PathProgramCache]: Analyzing trace with hash -481609427, now seen corresponding path program 1 times [2022-07-12 10:17:10,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:10,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719260307] [2022-07-12 10:17:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:10,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:10,996 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:11,016 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:11,017 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:11,017 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:11,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:11,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-12 10:17:11,017 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:17:11,018 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:11,018 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-12 10:17:11,038 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-12 10:17:11,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 369 places, 423 transitions, 1016 flow [2022-07-12 10:17:15,116 INFO L129 PetriNetUnfolder]: 5235/20176 cut-off events. [2022-07-12 10:17:15,116 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-12 10:17:15,489 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25382 conditions, 20176 events. 5235/20176 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 210965 event pairs, 3084 based on Foata normal form. 0/18002 useless extension candidates. Maximal degree in co-relation 12483. Up to 5120 conditions per place. [2022-07-12 10:17:15,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 369 places, 423 transitions, 1016 flow [2022-07-12 10:17:15,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 423 transitions, 1016 flow [2022-07-12 10:17:15,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:15,725 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f1ece0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec41ac0 [2022-07-12 10:17:15,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:15,728 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2022-07-12 10:17:15,728 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:15,728 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:15,728 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:15,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash 865883060, now seen corresponding path program 1 times [2022-07-12 10:17:15,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:15,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538556080] [2022-07-12 10:17:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:15,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:15,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:15,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538556080] [2022-07-12 10:17:15,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538556080] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:15,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:15,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:15,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363865171] [2022-07-12 10:17:15,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:15,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:15,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:15,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:15,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:15,752 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 423 [2022-07-12 10:17:15,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 423 transitions, 1016 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:15,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:15,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 423 [2022-07-12 10:17:15,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:20,291 INFO L129 PetriNetUnfolder]: 4106/19018 cut-off events. [2022-07-12 10:17:20,292 INFO L130 PetriNetUnfolder]: For 15650/15973 co-relation queries the response was YES. [2022-07-12 10:17:20,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29409 conditions, 19018 events. 4106/19018 cut-off events. For 15650/15973 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 206294 event pairs, 3084 based on Foata normal form. 33320/51294 useless extension candidates. Maximal degree in co-relation 14220. Up to 5180 conditions per place. [2022-07-12 10:17:20,522 INFO L132 encePairwiseOnDemand]: 355/423 looper letters, 19 selfloop transitions, 2 changer transitions 30/361 dead transitions. [2022-07-12 10:17:20,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 361 transitions, 954 flow [2022-07-12 10:17:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1094 transitions. [2022-07-12 10:17:20,524 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8620961386918834 [2022-07-12 10:17:20,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1094 transitions. [2022-07-12 10:17:20,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1094 transitions. [2022-07-12 10:17:20,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:20,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1094 transitions. [2022-07-12 10:17:20,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,526 INFO L186 Difference]: Start difference. First operand has 369 places, 423 transitions, 1016 flow. Second operand 3 states and 1094 transitions. [2022-07-12 10:17:20,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 361 transitions, 954 flow [2022-07-12 10:17:20,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 361 transitions, 954 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:20,536 INFO L242 Difference]: Finished difference. Result has 371 places, 328 transitions, 806 flow [2022-07-12 10:17:20,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=806, PETRI_PLACES=371, PETRI_TRANSITIONS=328} [2022-07-12 10:17:20,536 INFO L279 CegarLoopForPetriNet]: 369 programPoint places, 2 predicate places. [2022-07-12 10:17:20,537 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 328 transitions, 806 flow [2022-07-12 10:17:20,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,537 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:20,537 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:20,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-12 10:17:20,537 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:20,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:20,538 INFO L85 PathProgramCache]: Analyzing trace with hash 880973881, now seen corresponding path program 1 times [2022-07-12 10:17:20,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:20,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168131746] [2022-07-12 10:17:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:20,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:20,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:20,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168131746] [2022-07-12 10:17:20,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168131746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:20,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188333660] [2022-07-12 10:17:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:20,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:20,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:20,560 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:20,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 10:17:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:20,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:20,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:20,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:20,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188333660] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:20,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:20,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:20,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110780038] [2022-07-12 10:17:20,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:20,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:20,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:20,728 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 423 [2022-07-12 10:17:20,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 328 transitions, 806 flow. Second operand has 10 states, 10 states have (on average 331.3) internal successors, (3313), 10 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:20,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 423 [2022-07-12 10:17:20,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:21,003 INFO L129 PetriNetUnfolder]: 0/496 cut-off events. [2022-07-12 10:17:21,003 INFO L130 PetriNetUnfolder]: For 213/213 co-relation queries the response was YES. [2022-07-12 10:17:21,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 496 events. 0/496 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1486 event pairs, 0 based on Foata normal form. 2/498 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-12 10:17:21,004 INFO L132 encePairwiseOnDemand]: 417/423 looper letters, 20 selfloop transitions, 9 changer transitions 0/338 dead transitions. [2022-07-12 10:17:21,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 338 transitions, 886 flow [2022-07-12 10:17:21,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2992 transitions. [2022-07-12 10:17:21,007 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7859206724454951 [2022-07-12 10:17:21,007 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2992 transitions. [2022-07-12 10:17:21,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2992 transitions. [2022-07-12 10:17:21,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:21,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2992 transitions. [2022-07-12 10:17:21,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 332.44444444444446) internal successors, (2992), 9 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,012 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,012 INFO L186 Difference]: Start difference. First operand has 371 places, 328 transitions, 806 flow. Second operand 9 states and 2992 transitions. [2022-07-12 10:17:21,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 338 transitions, 886 flow [2022-07-12 10:17:21,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 338 transitions, 794 flow, removed 45 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:21,017 INFO L242 Difference]: Finished difference. Result has 361 places, 334 transitions, 764 flow [2022-07-12 10:17:21,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=764, PETRI_PLACES=361, PETRI_TRANSITIONS=334} [2022-07-12 10:17:21,018 INFO L279 CegarLoopForPetriNet]: 369 programPoint places, -8 predicate places. [2022-07-12 10:17:21,018 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 334 transitions, 764 flow [2022-07-12 10:17:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 331.3) internal successors, (3313), 10 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,019 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:21,019 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:21,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:21,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:21,237 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash 549279264, now seen corresponding path program 1 times [2022-07-12 10:17:21,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:21,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149379460] [2022-07-12 10:17:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:21,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:21,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:21,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149379460] [2022-07-12 10:17:21,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149379460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:21,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680306881] [2022-07-12 10:17:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:21,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:21,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:21,288 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:21,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 10:17:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:21,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:21,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:21,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680306881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:21,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:21,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:21,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019182] [2022-07-12 10:17:21,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:21,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:21,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:21,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:21,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:21,543 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 423 [2022-07-12 10:17:21,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 334 transitions, 764 flow. Second operand has 18 states, 18 states have (on average 331.6111111111111) internal successors, (5969), 18 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:21,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 423 [2022-07-12 10:17:21,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:21,771 INFO L129 PetriNetUnfolder]: 0/448 cut-off events. [2022-07-12 10:17:21,771 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-12 10:17:21,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 448 events. 0/448 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1169 event pairs, 0 based on Foata normal form. 4/452 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-12 10:17:21,772 INFO L132 encePairwiseOnDemand]: 417/423 looper letters, 28 selfloop transitions, 21 changer transitions 0/358 dead transitions. [2022-07-12 10:17:21,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 358 transitions, 970 flow [2022-07-12 10:17:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6962 transitions. [2022-07-12 10:17:21,777 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7837442305527412 [2022-07-12 10:17:21,777 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6962 transitions. [2022-07-12 10:17:21,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6962 transitions. [2022-07-12 10:17:21,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:21,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6962 transitions. [2022-07-12 10:17:21,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 331.5238095238095) internal successors, (6962), 21 states have internal predecessors, (6962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 423.0) internal successors, (9306), 22 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,788 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 423.0) internal successors, (9306), 22 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,788 INFO L186 Difference]: Start difference. First operand has 361 places, 334 transitions, 764 flow. Second operand 21 states and 6962 transitions. [2022-07-12 10:17:21,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 358 transitions, 970 flow [2022-07-12 10:17:21,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 358 transitions, 956 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:21,793 INFO L242 Difference]: Finished difference. Result has 385 places, 347 transitions, 888 flow [2022-07-12 10:17:21,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=888, PETRI_PLACES=385, PETRI_TRANSITIONS=347} [2022-07-12 10:17:21,794 INFO L279 CegarLoopForPetriNet]: 369 programPoint places, 16 predicate places. [2022-07-12 10:17:21,794 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 347 transitions, 888 flow [2022-07-12 10:17:21,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 331.6111111111111) internal successors, (5969), 18 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,795 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:21,795 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:21,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:22,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:22,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:22,013 INFO L85 PathProgramCache]: Analyzing trace with hash -779892638, now seen corresponding path program 1 times [2022-07-12 10:17:22,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:22,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007815699] [2022-07-12 10:17:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:22,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:22,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:22,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007815699] [2022-07-12 10:17:22,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007815699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:22,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626936374] [2022-07-12 10:17:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:22,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:22,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:22,117 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:22,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 10:17:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:22,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:22,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:22,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626936374] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:22,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:22,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:22,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82664439] [2022-07-12 10:17:22,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:22,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:22,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:22,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:22,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:22,576 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 423 [2022-07-12 10:17:22,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 347 transitions, 888 flow. Second operand has 34 states, 34 states have (on average 331.79411764705884) internal successors, (11281), 34 states have internal predecessors, (11281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:22,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 423 [2022-07-12 10:17:22,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:22,926 INFO L129 PetriNetUnfolder]: 0/400 cut-off events. [2022-07-12 10:17:22,927 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-12 10:17:22,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 400 events. 0/400 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/404 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-12 10:17:22,927 INFO L132 encePairwiseOnDemand]: 418/423 looper letters, 33 selfloop transitions, 31 changer transitions 0/362 dead transitions. [2022-07-12 10:17:22,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 362 transitions, 1126 flow [2022-07-12 10:17:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 10:17:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-12 10:17:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10925 transitions. [2022-07-12 10:17:22,934 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.782649186904506 [2022-07-12 10:17:22,934 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10925 transitions. [2022-07-12 10:17:22,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10925 transitions. [2022-07-12 10:17:22,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:22,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10925 transitions. [2022-07-12 10:17:22,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 331.06060606060606) internal successors, (10925), 33 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 423.0) internal successors, (14382), 34 states have internal predecessors, (14382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,952 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 423.0) internal successors, (14382), 34 states have internal predecessors, (14382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,952 INFO L186 Difference]: Start difference. First operand has 385 places, 347 transitions, 888 flow. Second operand 33 states and 10925 transitions. [2022-07-12 10:17:22,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 362 transitions, 1126 flow [2022-07-12 10:17:22,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 362 transitions, 1060 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-12 10:17:22,958 INFO L242 Difference]: Finished difference. Result has 392 places, 344 transitions, 921 flow [2022-07-12 10:17:22,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=921, PETRI_PLACES=392, PETRI_TRANSITIONS=344} [2022-07-12 10:17:22,958 INFO L279 CegarLoopForPetriNet]: 369 programPoint places, 23 predicate places. [2022-07-12 10:17:22,958 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 344 transitions, 921 flow [2022-07-12 10:17:22,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 331.79411764705884) internal successors, (11281), 34 states have internal predecessors, (11281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,960 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:22,960 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:23,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:23,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:23,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:23,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1995263601, now seen corresponding path program 1 times [2022-07-12 10:17:23,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:23,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485884363] [2022-07-12 10:17:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:23,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:23,192 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:23,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:23,215 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:23,216 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:23,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:23,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-12 10:17:23,216 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:17:23,216 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:23,217 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-12 10:17:23,237 INFO L135 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-07-12 10:17:23,239 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 398 places, 457 transitions, 1112 flow [2022-07-12 10:17:31,920 INFO L129 PetriNetUnfolder]: 11390/40722 cut-off events. [2022-07-12 10:17:31,921 INFO L130 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2022-07-12 10:17:34,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52086 conditions, 40722 events. 11390/40722 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 478695 event pairs, 7181 based on Foata normal form. 0/36488 useless extension candidates. Maximal degree in co-relation 25360. Up to 11264 conditions per place. [2022-07-12 10:17:34,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 398 places, 457 transitions, 1112 flow