./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/weaver/parallel-misc-2.wvr.c -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 c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:29:22,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:29:22,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:29:22,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:29:22,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:29:22,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:29:22,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:29:22,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:29:22,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:29:22,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:29:22,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:29:22,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:29:22,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:29:22,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:29:22,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:29:22,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:29:22,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:29:22,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:29:22,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:29:22,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:29:22,601 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:29:22,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:29:22,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:29:22,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:29:22,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:29:22,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:29:22,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:29:22,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:29:22,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:29:22,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:29:22,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:29:22,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:29:22,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:29:22,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:29:22,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:29:22,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:29:22,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:29:22,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:29:22,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:29:22,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:29:22,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:29:22,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:29:22,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:29:22,654 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:29:22,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:29:22,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:29:22,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:29:22,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:29:22,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:29:22,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:29:22,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:29:22,659 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:29:22,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:29:22,660 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:29:22,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:29:22,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:29:22,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:29:22,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:29:22,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:29:22,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:29:22,661 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:29:22,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:29:22,661 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:29:22,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:29:22,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:29:22,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:29:22,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:29:22,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:29:22,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:29:22,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:29:22,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:29:22,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:29:22,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:29:22,664 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:29:22,664 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:29:22,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:29:22,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 [2022-07-19 21:29:22,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:29:22,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:29:22,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:29:22,941 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:29:22,941 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:29:22,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2022-07-19 21:29:22,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0012bbeb2/5f641ff3e9694e1ba3cf6d5d2d8b34bc/FLAG6a75e2b41 [2022-07-19 21:29:23,411 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:29:23,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2022-07-19 21:29:23,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0012bbeb2/5f641ff3e9694e1ba3cf6d5d2d8b34bc/FLAG6a75e2b41 [2022-07-19 21:29:23,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0012bbeb2/5f641ff3e9694e1ba3cf6d5d2d8b34bc [2022-07-19 21:29:23,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:29:23,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:29:23,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:29:23,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:29:23,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:29:23,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:29:23" (1/1) ... [2022-07-19 21:29:23,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58d35592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:23, skipping insertion in model container [2022-07-19 21:29:23,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:29:23" (1/1) ... [2022-07-19 21:29:23,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:29:23,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:29:24,018 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/weaver/parallel-misc-2.wvr.c[2554,2567] [2022-07-19 21:29:24,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:29:24,031 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:29:24,063 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/weaver/parallel-misc-2.wvr.c[2554,2567] [2022-07-19 21:29:24,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:29:24,087 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:29:24,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24 WrapperNode [2022-07-19 21:29:24,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:29:24,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:29:24,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:29:24,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:29:24,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24" (1/1) ... [2022-07-19 21:29:24,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24" (1/1) ... [2022-07-19 21:29:24,131 INFO L137 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2022-07-19 21:29:24,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:29:24,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:29:24,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:29:24,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:29:24,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24" (1/1) ... [2022-07-19 21:29:24,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24" (1/1) ... [2022-07-19 21:29:24,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24" (1/1) ... [2022-07-19 21:29:24,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24" (1/1) ... [2022-07-19 21:29:24,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24" (1/1) ... [2022-07-19 21:29:24,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24" (1/1) ... [2022-07-19 21:29:24,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24" (1/1) ... [2022-07-19 21:29:24,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:29:24,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:29:24,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:29:24,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:29:24,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24" (1/1) ... [2022-07-19 21:29:24,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:29:24,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:24,196 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) [2022-07-19 21:29:24,198 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 [2022-07-19 21:29:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:29:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:29:24,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:29:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:29:24,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:29:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:29:24,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:29:24,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:29:24,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:29:24,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:29:24,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:29:24,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:29:24,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:29:24,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:29:24,236 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:29:24,327 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:29:24,329 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:29:24,555 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:29:24,587 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:29:24,587 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:29:24,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:29:24 BoogieIcfgContainer [2022-07-19 21:29:24,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:29:24,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:29:24,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:29:24,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:29:24,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:29:23" (1/3) ... [2022-07-19 21:29:24,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f16c038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:29:24, skipping insertion in model container [2022-07-19 21:29:24,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:24" (2/3) ... [2022-07-19 21:29:24,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f16c038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:29:24, skipping insertion in model container [2022-07-19 21:29:24,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:29:24" (3/3) ... [2022-07-19 21:29:24,610 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2022-07-19 21:29:24,615 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:29:24,622 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:29:24,626 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:29:24,626 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:29:24,701 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:29:24,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 103 places, 104 transitions, 224 flow [2022-07-19 21:29:24,766 INFO L129 PetriNetUnfolder]: 8/102 cut-off events. [2022-07-19 21:29:24,766 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:29:24,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 8/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2022-07-19 21:29:24,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 104 transitions, 224 flow [2022-07-19 21:29:24,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2022-07-19 21:29:24,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:29:24,788 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@7ee10146, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7357ad17 [2022-07-19 21:29:24,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:29:24,810 INFO L129 PetriNetUnfolder]: 8/92 cut-off events. [2022-07-19 21:29:24,811 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:29:24,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:24,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:24,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:24,817 INFO L85 PathProgramCache]: Analyzing trace with hash -669652547, now seen corresponding path program 1 times [2022-07-19 21:29:24,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:24,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41746368] [2022-07-19 21:29:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:25,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:25,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41746368] [2022-07-19 21:29:25,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41746368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:25,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:25,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:29:25,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632989712] [2022-07-19 21:29:25,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:25,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:29:25,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:25,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:29:25,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:29:25,089 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 104 [2022-07-19 21:29:25,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 198 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 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) [2022-07-19 21:29:25,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:25,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 104 [2022-07-19 21:29:25,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:25,152 INFO L129 PetriNetUnfolder]: 7/96 cut-off events. [2022-07-19 21:29:25,157 INFO L130 PetriNetUnfolder]: For 10/11 co-relation queries the response was YES. [2022-07-19 21:29:25,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 96 events. 7/96 cut-off events. For 10/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 1 based on Foata normal form. 7/96 useless extension candidates. Maximal degree in co-relation 65. Up to 10 conditions per place. [2022-07-19 21:29:25,159 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 6 selfloop transitions, 0 changer transitions 2/89 dead transitions. [2022-07-19 21:29:25,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 89 transitions, 202 flow [2022-07-19 21:29:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:29:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:29:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2022-07-19 21:29:25,176 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9423076923076923 [2022-07-19 21:29:25,176 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2022-07-19 21:29:25,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2022-07-19 21:29:25,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:25,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2022-07-19 21:29:25,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 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) [2022-07-19 21:29:25,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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) [2022-07-19 21:29:25,194 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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) [2022-07-19 21:29:25,195 INFO L186 Difference]: Start difference. First operand has 92 places, 93 transitions, 198 flow. Second operand 2 states and 196 transitions. [2022-07-19 21:29:25,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 89 transitions, 202 flow [2022-07-19 21:29:25,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 194 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:29:25,209 INFO L242 Difference]: Finished difference. Result has 89 places, 87 transitions, 178 flow [2022-07-19 21:29:25,211 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=178, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2022-07-19 21:29:25,214 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2022-07-19 21:29:25,214 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 178 flow [2022-07-19 21:29:25,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 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) [2022-07-19 21:29:25,215 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:25,215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:25,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:29:25,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1666724900, now seen corresponding path program 1 times [2022-07-19 21:29:25,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:25,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641821625] [2022-07-19 21:29:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:25,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:25,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:25,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641821625] [2022-07-19 21:29:25,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641821625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:25,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:25,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:29:25,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228200755] [2022-07-19 21:29:25,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:25,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:29:25,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:29:25,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:29:25,465 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-19 21:29:25,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 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) [2022-07-19 21:29:25,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:25,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-19 21:29:25,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:25,594 INFO L129 PetriNetUnfolder]: 21/139 cut-off events. [2022-07-19 21:29:25,594 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-07-19 21:29:25,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 139 events. 21/139 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 0 based on Foata normal form. 1/129 useless extension candidates. Maximal degree in co-relation 184. Up to 31 conditions per place. [2022-07-19 21:29:25,596 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 15 selfloop transitions, 9 changer transitions 4/97 dead transitions. [2022-07-19 21:29:25,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 97 transitions, 257 flow [2022-07-19 21:29:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:29:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:29:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 582 transitions. [2022-07-19 21:29:25,602 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7994505494505495 [2022-07-19 21:29:25,602 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 582 transitions. [2022-07-19 21:29:25,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 582 transitions. [2022-07-19 21:29:25,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:25,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 582 transitions. [2022-07-19 21:29:25,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 83.14285714285714) internal successors, (582), 7 states have internal predecessors, (582), 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) [2022-07-19 21:29:25,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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) [2022-07-19 21:29:25,612 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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) [2022-07-19 21:29:25,612 INFO L186 Difference]: Start difference. First operand has 89 places, 87 transitions, 178 flow. Second operand 7 states and 582 transitions. [2022-07-19 21:29:25,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 97 transitions, 257 flow [2022-07-19 21:29:25,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 97 transitions, 257 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:29:25,615 INFO L242 Difference]: Finished difference. Result has 96 places, 91 transitions, 225 flow [2022-07-19 21:29:25,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=96, PETRI_TRANSITIONS=91} [2022-07-19 21:29:25,615 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 4 predicate places. [2022-07-19 21:29:25,616 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 91 transitions, 225 flow [2022-07-19 21:29:25,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 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) [2022-07-19 21:29:25,616 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:25,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:25,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:29:25,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:25,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:25,617 INFO L85 PathProgramCache]: Analyzing trace with hash 319045297, now seen corresponding path program 1 times [2022-07-19 21:29:25,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:25,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499610447] [2022-07-19 21:29:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:25,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:25,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499610447] [2022-07-19 21:29:25,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499610447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879055204] [2022-07-19 21:29:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:25,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:25,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:25,810 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) [2022-07-19 21:29:25,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:29:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:25,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:29:25,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:26,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:26,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879055204] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:26,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:26,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-19 21:29:26,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93140998] [2022-07-19 21:29:26,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:26,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:29:26,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:29:26,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:29:26,740 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-19 21:29:26,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 91 transitions, 225 flow. Second operand has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 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) [2022-07-19 21:29:26,742 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:26,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-19 21:29:26,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:27,087 INFO L129 PetriNetUnfolder]: 116/418 cut-off events. [2022-07-19 21:29:27,087 INFO L130 PetriNetUnfolder]: For 55/62 co-relation queries the response was YES. [2022-07-19 21:29:27,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 418 events. 116/418 cut-off events. For 55/62 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1995 event pairs, 7 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 732. Up to 66 conditions per place. [2022-07-19 21:29:27,092 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 57 selfloop transitions, 14 changer transitions 1/133 dead transitions. [2022-07-19 21:29:27,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 133 transitions, 480 flow [2022-07-19 21:29:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:29:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:29:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 763 transitions. [2022-07-19 21:29:27,096 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7336538461538461 [2022-07-19 21:29:27,096 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 763 transitions. [2022-07-19 21:29:27,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 763 transitions. [2022-07-19 21:29:27,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:27,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 763 transitions. [2022-07-19 21:29:27,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.3) internal successors, (763), 10 states have internal predecessors, (763), 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) [2022-07-19 21:29:27,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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) [2022-07-19 21:29:27,102 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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) [2022-07-19 21:29:27,103 INFO L186 Difference]: Start difference. First operand has 96 places, 91 transitions, 225 flow. Second operand 10 states and 763 transitions. [2022-07-19 21:29:27,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 133 transitions, 480 flow [2022-07-19 21:29:27,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 133 transitions, 461 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-19 21:29:27,108 INFO L242 Difference]: Finished difference. Result has 103 places, 99 transitions, 290 flow [2022-07-19 21:29:27,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=290, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2022-07-19 21:29:27,109 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 11 predicate places. [2022-07-19 21:29:27,109 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 290 flow [2022-07-19 21:29:27,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 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) [2022-07-19 21:29:27,110 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:27,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:27,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:29:27,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:27,320 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash -217293375, now seen corresponding path program 2 times [2022-07-19 21:29:27,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:27,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121370475] [2022-07-19 21:29:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:27,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:27,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121370475] [2022-07-19 21:29:27,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121370475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:27,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:27,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:29:27,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526359380] [2022-07-19 21:29:27,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:27,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:29:27,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:27,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:29:27,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:29:27,502 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-19 21:29:27,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 99 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 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) [2022-07-19 21:29:27,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:27,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-19 21:29:27,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:27,685 INFO L129 PetriNetUnfolder]: 116/398 cut-off events. [2022-07-19 21:29:27,686 INFO L130 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-07-19 21:29:27,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 398 events. 116/398 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1893 event pairs, 14 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 848. Up to 97 conditions per place. [2022-07-19 21:29:27,691 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 43 selfloop transitions, 16 changer transitions 4/124 dead transitions. [2022-07-19 21:29:27,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 124 transitions, 529 flow [2022-07-19 21:29:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:29:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:29:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 536 transitions. [2022-07-19 21:29:27,694 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2022-07-19 21:29:27,696 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 536 transitions. [2022-07-19 21:29:27,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 536 transitions. [2022-07-19 21:29:27,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:27,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 536 transitions. [2022-07-19 21:29:27,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 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) [2022-07-19 21:29:27,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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) [2022-07-19 21:29:27,701 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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) [2022-07-19 21:29:27,701 INFO L186 Difference]: Start difference. First operand has 103 places, 99 transitions, 290 flow. Second operand 7 states and 536 transitions. [2022-07-19 21:29:27,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 124 transitions, 529 flow [2022-07-19 21:29:27,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 124 transitions, 523 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:29:27,708 INFO L242 Difference]: Finished difference. Result has 109 places, 105 transitions, 385 flow [2022-07-19 21:29:27,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=109, PETRI_TRANSITIONS=105} [2022-07-19 21:29:27,709 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 17 predicate places. [2022-07-19 21:29:27,710 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 105 transitions, 385 flow [2022-07-19 21:29:27,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 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) [2022-07-19 21:29:27,710 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:27,710 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:27,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:29:27,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:27,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1113196752, now seen corresponding path program 1 times [2022-07-19 21:29:27,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:27,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182131688] [2022-07-19 21:29:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:27,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182131688] [2022-07-19 21:29:27,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182131688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:27,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:27,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:29:27,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795493252] [2022-07-19 21:29:27,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:27,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:29:27,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:27,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:29:27,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:29:27,855 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-19 21:29:27,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 105 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 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) [2022-07-19 21:29:27,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:27,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-19 21:29:27,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:28,016 INFO L129 PetriNetUnfolder]: 111/390 cut-off events. [2022-07-19 21:29:28,016 INFO L130 PetriNetUnfolder]: For 450/457 co-relation queries the response was YES. [2022-07-19 21:29:28,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 390 events. 111/390 cut-off events. For 450/457 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1815 event pairs, 14 based on Foata normal form. 2/361 useless extension candidates. Maximal degree in co-relation 910. Up to 126 conditions per place. [2022-07-19 21:29:28,020 INFO L132 encePairwiseOnDemand]: 91/104 looper letters, 48 selfloop transitions, 12 changer transitions 5/126 dead transitions. [2022-07-19 21:29:28,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 593 flow [2022-07-19 21:29:28,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:29:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:29:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 537 transitions. [2022-07-19 21:29:28,023 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7376373626373627 [2022-07-19 21:29:28,023 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 537 transitions. [2022-07-19 21:29:28,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 537 transitions. [2022-07-19 21:29:28,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:28,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 537 transitions. [2022-07-19 21:29:28,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 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) [2022-07-19 21:29:28,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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) [2022-07-19 21:29:28,027 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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) [2022-07-19 21:29:28,027 INFO L186 Difference]: Start difference. First operand has 109 places, 105 transitions, 385 flow. Second operand 7 states and 537 transitions. [2022-07-19 21:29:28,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 593 flow [2022-07-19 21:29:28,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 126 transitions, 585 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-19 21:29:28,037 INFO L242 Difference]: Finished difference. Result has 115 places, 105 transitions, 404 flow [2022-07-19 21:29:28,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=115, PETRI_TRANSITIONS=105} [2022-07-19 21:29:28,040 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 23 predicate places. [2022-07-19 21:29:28,040 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 105 transitions, 404 flow [2022-07-19 21:29:28,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 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) [2022-07-19 21:29:28,040 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:28,041 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:28,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:29:28,041 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:28,042 INFO L85 PathProgramCache]: Analyzing trace with hash 704217598, now seen corresponding path program 2 times [2022-07-19 21:29:28,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:28,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482787121] [2022-07-19 21:29:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:28,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:28,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:28,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482787121] [2022-07-19 21:29:28,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482787121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:28,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:28,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:29:28,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17888765] [2022-07-19 21:29:28,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:28,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:29:28,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:28,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:29:28,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:29:28,166 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-19 21:29:28,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 105 transitions, 404 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 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) [2022-07-19 21:29:28,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:28,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-19 21:29:28,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:28,312 INFO L129 PetriNetUnfolder]: 106/371 cut-off events. [2022-07-19 21:29:28,313 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-19 21:29:28,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 371 events. 106/371 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1567 event pairs, 17 based on Foata normal form. 4/347 useless extension candidates. Maximal degree in co-relation 907. Up to 75 conditions per place. [2022-07-19 21:29:28,317 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 47 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2022-07-19 21:29:28,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 638 flow [2022-07-19 21:29:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:29:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:29:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 531 transitions. [2022-07-19 21:29:28,319 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7293956043956044 [2022-07-19 21:29:28,319 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 531 transitions. [2022-07-19 21:29:28,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 531 transitions. [2022-07-19 21:29:28,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:28,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 531 transitions. [2022-07-19 21:29:28,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 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) [2022-07-19 21:29:28,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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) [2022-07-19 21:29:28,330 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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) [2022-07-19 21:29:28,330 INFO L186 Difference]: Start difference. First operand has 115 places, 105 transitions, 404 flow. Second operand 7 states and 531 transitions. [2022-07-19 21:29:28,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 638 flow [2022-07-19 21:29:28,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 124 transitions, 610 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-07-19 21:29:28,335 INFO L242 Difference]: Finished difference. Result has 120 places, 110 transitions, 482 flow [2022-07-19 21:29:28,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=482, PETRI_PLACES=120, PETRI_TRANSITIONS=110} [2022-07-19 21:29:28,336 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 28 predicate places. [2022-07-19 21:29:28,337 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 110 transitions, 482 flow [2022-07-19 21:29:28,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 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) [2022-07-19 21:29:28,337 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:28,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:28,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:29:28,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:28,338 INFO L85 PathProgramCache]: Analyzing trace with hash -147861111, now seen corresponding path program 1 times [2022-07-19 21:29:28,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:28,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756948676] [2022-07-19 21:29:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:28,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:28,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:28,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756948676] [2022-07-19 21:29:28,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756948676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:28,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402566444] [2022-07-19 21:29:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:28,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:28,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:28,528 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) [2022-07-19 21:29:28,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:29:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:28,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:29:28,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:28,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:29,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402566444] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:29,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:29,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-07-19 21:29:29,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510318215] [2022-07-19 21:29:29,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:29,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:29:29,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:29,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:29:29,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:29:29,434 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2022-07-19 21:29:29,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 110 transitions, 482 flow. Second operand has 20 states, 20 states have (on average 70.25) internal successors, (1405), 20 states have internal predecessors, (1405), 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) [2022-07-19 21:29:29,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:29,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2022-07-19 21:29:29,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:32,055 INFO L129 PetriNetUnfolder]: 347/929 cut-off events. [2022-07-19 21:29:32,055 INFO L130 PetriNetUnfolder]: For 2692/2692 co-relation queries the response was YES. [2022-07-19 21:29:32,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 929 events. 347/929 cut-off events. For 2692/2692 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5041 event pairs, 10 based on Foata normal form. 44/909 useless extension candidates. Maximal degree in co-relation 2682. Up to 178 conditions per place. [2022-07-19 21:29:32,065 INFO L132 encePairwiseOnDemand]: 88/104 looper letters, 178 selfloop transitions, 87 changer transitions 0/324 dead transitions. [2022-07-19 21:29:32,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 324 transitions, 2285 flow [2022-07-19 21:29:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-19 21:29:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-19 21:29:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3067 transitions. [2022-07-19 21:29:32,073 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7021520146520146 [2022-07-19 21:29:32,074 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3067 transitions. [2022-07-19 21:29:32,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3067 transitions. [2022-07-19 21:29:32,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:32,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3067 transitions. [2022-07-19 21:29:32,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 73.02380952380952) internal successors, (3067), 42 states have internal predecessors, (3067), 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) [2022-07-19 21:29:32,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 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) [2022-07-19 21:29:32,091 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 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) [2022-07-19 21:29:32,091 INFO L186 Difference]: Start difference. First operand has 120 places, 110 transitions, 482 flow. Second operand 42 states and 3067 transitions. [2022-07-19 21:29:32,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 324 transitions, 2285 flow [2022-07-19 21:29:32,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 324 transitions, 2220 flow, removed 28 selfloop flow, removed 3 redundant places. [2022-07-19 21:29:32,102 INFO L242 Difference]: Finished difference. Result has 189 places, 195 transitions, 1417 flow [2022-07-19 21:29:32,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1417, PETRI_PLACES=189, PETRI_TRANSITIONS=195} [2022-07-19 21:29:32,103 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 97 predicate places. [2022-07-19 21:29:32,103 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 195 transitions, 1417 flow [2022-07-19 21:29:32,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.25) internal successors, (1405), 20 states have internal predecessors, (1405), 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) [2022-07-19 21:29:32,104 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:32,104 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:32,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:29:32,327 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,SelfDestructingSolverStorable6 [2022-07-19 21:29:32,327 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1821391862, now seen corresponding path program 2 times [2022-07-19 21:29:32,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:32,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295887090] [2022-07-19 21:29:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:32,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:32,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:32,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295887090] [2022-07-19 21:29:32,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295887090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:32,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:32,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:29:32,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701454033] [2022-07-19 21:29:32,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:32,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:29:32,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:32,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:29:32,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:29:32,400 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-19 21:29:32,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 195 transitions, 1417 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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) [2022-07-19 21:29:32,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:32,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-19 21:29:32,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:32,679 INFO L129 PetriNetUnfolder]: 434/1682 cut-off events. [2022-07-19 21:29:32,679 INFO L130 PetriNetUnfolder]: For 12826/12903 co-relation queries the response was YES. [2022-07-19 21:29:32,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6581 conditions, 1682 events. 434/1682 cut-off events. For 12826/12903 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13422 event pairs, 108 based on Foata normal form. 23/1564 useless extension candidates. Maximal degree in co-relation 6531. Up to 232 conditions per place. [2022-07-19 21:29:32,702 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 28 selfloop transitions, 5 changer transitions 0/212 dead transitions. [2022-07-19 21:29:32,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 212 transitions, 1563 flow [2022-07-19 21:29:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:29:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:29:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2022-07-19 21:29:32,704 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9038461538461539 [2022-07-19 21:29:32,704 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2022-07-19 21:29:32,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2022-07-19 21:29:32,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:32,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2022-07-19 21:29:32,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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) [2022-07-19 21:29:32,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2022-07-19 21:29:32,707 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2022-07-19 21:29:32,707 INFO L186 Difference]: Start difference. First operand has 189 places, 195 transitions, 1417 flow. Second operand 4 states and 376 transitions. [2022-07-19 21:29:32,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 212 transitions, 1563 flow [2022-07-19 21:29:32,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 212 transitions, 1476 flow, removed 36 selfloop flow, removed 5 redundant places. [2022-07-19 21:29:32,750 INFO L242 Difference]: Finished difference. Result has 190 places, 198 transitions, 1364 flow [2022-07-19 21:29:32,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1364, PETRI_PLACES=190, PETRI_TRANSITIONS=198} [2022-07-19 21:29:32,752 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 98 predicate places. [2022-07-19 21:29:32,752 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 198 transitions, 1364 flow [2022-07-19 21:29:32,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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) [2022-07-19 21:29:32,753 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:32,753 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:32,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:29:32,753 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:32,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:32,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1384763482, now seen corresponding path program 1 times [2022-07-19 21:29:32,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:32,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872475256] [2022-07-19 21:29:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:32,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 21:29:32,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:32,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872475256] [2022-07-19 21:29:32,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872475256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:32,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183864913] [2022-07-19 21:29:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:32,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:32,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:32,982 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) [2022-07-19 21:29:32,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:29:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:29:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 21:29:33,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 21:29:33,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183864913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:33,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:33,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-07-19 21:29:33,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775540877] [2022-07-19 21:29:33,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:33,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:29:33,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:29:33,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:29:33,788 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 104 [2022-07-19 21:29:33,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 198 transitions, 1364 flow. Second operand has 18 states, 18 states have (on average 71.22222222222223) internal successors, (1282), 18 states have internal predecessors, (1282), 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) [2022-07-19 21:29:33,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:33,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 104 [2022-07-19 21:29:33,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:34,613 INFO L129 PetriNetUnfolder]: 828/2406 cut-off events. [2022-07-19 21:29:34,613 INFO L130 PetriNetUnfolder]: For 18550/18603 co-relation queries the response was YES. [2022-07-19 21:29:34,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10323 conditions, 2406 events. 828/2406 cut-off events. For 18550/18603 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18926 event pairs, 65 based on Foata normal form. 15/2264 useless extension candidates. Maximal degree in co-relation 10270. Up to 449 conditions per place. [2022-07-19 21:29:34,644 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 115 selfloop transitions, 63 changer transitions 0/249 dead transitions. [2022-07-19 21:29:34,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 249 transitions, 2222 flow [2022-07-19 21:29:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:29:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:29:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 973 transitions. [2022-07-19 21:29:34,647 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7196745562130178 [2022-07-19 21:29:34,647 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 973 transitions. [2022-07-19 21:29:34,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 973 transitions. [2022-07-19 21:29:34,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:34,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 973 transitions. [2022-07-19 21:29:34,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.84615384615384) internal successors, (973), 13 states have internal predecessors, (973), 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) [2022-07-19 21:29:34,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 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) [2022-07-19 21:29:34,653 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 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) [2022-07-19 21:29:34,653 INFO L186 Difference]: Start difference. First operand has 190 places, 198 transitions, 1364 flow. Second operand 13 states and 973 transitions. [2022-07-19 21:29:34,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 249 transitions, 2222 flow [2022-07-19 21:29:34,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 249 transitions, 2222 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:29:34,710 INFO L242 Difference]: Finished difference. Result has 206 places, 206 transitions, 1660 flow [2022-07-19 21:29:34,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1660, PETRI_PLACES=206, PETRI_TRANSITIONS=206} [2022-07-19 21:29:34,712 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 114 predicate places. [2022-07-19 21:29:34,712 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 206 transitions, 1660 flow [2022-07-19 21:29:34,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.22222222222223) internal successors, (1282), 18 states have internal predecessors, (1282), 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) [2022-07-19 21:29:34,713 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:34,713 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:34,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 21:29:34,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:34,936 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:34,937 INFO L85 PathProgramCache]: Analyzing trace with hash -932018700, now seen corresponding path program 1 times [2022-07-19 21:29:34,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:34,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225549611] [2022-07-19 21:29:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:34,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 21:29:35,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:35,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225549611] [2022-07-19 21:29:35,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225549611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:35,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:35,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:29:35,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877161607] [2022-07-19 21:29:35,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:35,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:29:35,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:35,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:29:35,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:29:35,011 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-19 21:29:35,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 206 transitions, 1660 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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) [2022-07-19 21:29:35,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:35,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-19 21:29:35,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:35,292 INFO L129 PetriNetUnfolder]: 375/1488 cut-off events. [2022-07-19 21:29:35,293 INFO L130 PetriNetUnfolder]: For 11290/11369 co-relation queries the response was YES. [2022-07-19 21:29:35,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5982 conditions, 1488 events. 375/1488 cut-off events. For 11290/11369 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11125 event pairs, 90 based on Foata normal form. 31/1394 useless extension candidates. Maximal degree in co-relation 5925. Up to 235 conditions per place. [2022-07-19 21:29:35,314 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 24 selfloop transitions, 6 changer transitions 0/217 dead transitions. [2022-07-19 21:29:35,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 217 transitions, 1777 flow [2022-07-19 21:29:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:29:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:29:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 373 transitions. [2022-07-19 21:29:35,316 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8966346153846154 [2022-07-19 21:29:35,317 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 373 transitions. [2022-07-19 21:29:35,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 373 transitions. [2022-07-19 21:29:35,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:35,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 373 transitions. [2022-07-19 21:29:35,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 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) [2022-07-19 21:29:35,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2022-07-19 21:29:35,320 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2022-07-19 21:29:35,320 INFO L186 Difference]: Start difference. First operand has 206 places, 206 transitions, 1660 flow. Second operand 4 states and 373 transitions. [2022-07-19 21:29:35,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 217 transitions, 1777 flow [2022-07-19 21:29:35,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 217 transitions, 1742 flow, removed 1 selfloop flow, removed 7 redundant places. [2022-07-19 21:29:35,362 INFO L242 Difference]: Finished difference. Result has 204 places, 208 transitions, 1659 flow [2022-07-19 21:29:35,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1659, PETRI_PLACES=204, PETRI_TRANSITIONS=208} [2022-07-19 21:29:35,363 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 112 predicate places. [2022-07-19 21:29:35,363 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 208 transitions, 1659 flow [2022-07-19 21:29:35,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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) [2022-07-19 21:29:35,364 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:35,364 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:35,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:29:35,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:35,365 INFO L85 PathProgramCache]: Analyzing trace with hash 591378688, now seen corresponding path program 2 times [2022-07-19 21:29:35,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:35,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756412654] [2022-07-19 21:29:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:35,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:29:35,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:35,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756412654] [2022-07-19 21:29:35,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756412654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:35,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:35,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:29:35,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665537480] [2022-07-19 21:29:35,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:35,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:29:35,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:35,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:29:35,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:29:35,428 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-19 21:29:35,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 208 transitions, 1659 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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) [2022-07-19 21:29:35,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:35,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-19 21:29:35,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:36,188 INFO L129 PetriNetUnfolder]: 1011/3594 cut-off events. [2022-07-19 21:29:36,188 INFO L130 PetriNetUnfolder]: For 29453/29537 co-relation queries the response was YES. [2022-07-19 21:29:36,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15601 conditions, 3594 events. 1011/3594 cut-off events. For 29453/29537 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 34512 event pairs, 266 based on Foata normal form. 26/3394 useless extension candidates. Maximal degree in co-relation 15542. Up to 506 conditions per place. [2022-07-19 21:29:36,319 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 29 selfloop transitions, 5 changer transitions 0/226 dead transitions. [2022-07-19 21:29:36,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 226 transitions, 1809 flow [2022-07-19 21:29:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:29:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:29:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2022-07-19 21:29:36,322 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.90625 [2022-07-19 21:29:36,322 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2022-07-19 21:29:36,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2022-07-19 21:29:36,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:36,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2022-07-19 21:29:36,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 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) [2022-07-19 21:29:36,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2022-07-19 21:29:36,325 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2022-07-19 21:29:36,325 INFO L186 Difference]: Start difference. First operand has 204 places, 208 transitions, 1659 flow. Second operand 4 states and 377 transitions. [2022-07-19 21:29:36,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 226 transitions, 1809 flow [2022-07-19 21:29:36,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 226 transitions, 1809 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:29:36,443 INFO L242 Difference]: Finished difference. Result has 210 places, 211 transitions, 1693 flow [2022-07-19 21:29:36,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1693, PETRI_PLACES=210, PETRI_TRANSITIONS=211} [2022-07-19 21:29:36,444 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 118 predicate places. [2022-07-19 21:29:36,444 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 211 transitions, 1693 flow [2022-07-19 21:29:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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) [2022-07-19 21:29:36,444 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:36,445 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:36,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:29:36,445 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:36,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:36,446 INFO L85 PathProgramCache]: Analyzing trace with hash 291710930, now seen corresponding path program 1 times [2022-07-19 21:29:36,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:36,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457992867] [2022-07-19 21:29:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:36,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:36,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:36,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457992867] [2022-07-19 21:29:36,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457992867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:36,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087443954] [2022-07-19 21:29:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:36,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:36,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:36,636 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) [2022-07-19 21:29:36,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:29:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:36,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 21:29:36,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:36,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:36,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087443954] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:36,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:36,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-19 21:29:36,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055852796] [2022-07-19 21:29:36,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:36,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:29:36,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:36,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:29:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:29:36,972 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-19 21:29:36,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 211 transitions, 1693 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 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) [2022-07-19 21:29:36,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:36,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-19 21:29:36,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:37,828 INFO L129 PetriNetUnfolder]: 1003/3973 cut-off events. [2022-07-19 21:29:37,828 INFO L130 PetriNetUnfolder]: For 35812/36067 co-relation queries the response was YES. [2022-07-19 21:29:37,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18085 conditions, 3973 events. 1003/3973 cut-off events. For 35812/36067 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 39168 event pairs, 295 based on Foata normal form. 62/3861 useless extension candidates. Maximal degree in co-relation 18023. Up to 611 conditions per place. [2022-07-19 21:29:37,904 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 36 selfloop transitions, 20 changer transitions 4/246 dead transitions. [2022-07-19 21:29:37,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 246 transitions, 1951 flow [2022-07-19 21:29:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:29:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:29:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 844 transitions. [2022-07-19 21:29:37,908 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8115384615384615 [2022-07-19 21:29:37,908 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 844 transitions. [2022-07-19 21:29:37,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 844 transitions. [2022-07-19 21:29:37,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:37,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 844 transitions. [2022-07-19 21:29:37,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.4) internal successors, (844), 10 states have internal predecessors, (844), 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) [2022-07-19 21:29:37,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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) [2022-07-19 21:29:37,916 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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) [2022-07-19 21:29:37,916 INFO L186 Difference]: Start difference. First operand has 210 places, 211 transitions, 1693 flow. Second operand 10 states and 844 transitions. [2022-07-19 21:29:37,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 246 transitions, 1951 flow [2022-07-19 21:29:38,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 246 transitions, 1951 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:29:38,022 INFO L242 Difference]: Finished difference. Result has 222 places, 222 transitions, 1799 flow [2022-07-19 21:29:38,022 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1799, PETRI_PLACES=222, PETRI_TRANSITIONS=222} [2022-07-19 21:29:38,023 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 130 predicate places. [2022-07-19 21:29:38,023 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 222 transitions, 1799 flow [2022-07-19 21:29:38,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 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) [2022-07-19 21:29:38,023 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:38,024 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:38,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:29:38,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:38,227 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash -398723812, now seen corresponding path program 2 times [2022-07-19 21:29:38,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:38,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992653143] [2022-07-19 21:29:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:38,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:38,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:38,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992653143] [2022-07-19 21:29:38,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992653143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:38,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033106524] [2022-07-19 21:29:38,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:29:38,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:38,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:38,394 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) [2022-07-19 21:29:38,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:29:38,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:29:38,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:29:38,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 21:29:38,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:38,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:38,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033106524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:38,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:38,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-19 21:29:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883474051] [2022-07-19 21:29:38,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:38,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:29:38,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:29:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:29:38,798 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-19 21:29:38,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 222 transitions, 1799 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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) [2022-07-19 21:29:38,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:38,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-19 21:29:38,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:39,975 INFO L129 PetriNetUnfolder]: 1603/6338 cut-off events. [2022-07-19 21:29:39,975 INFO L130 PetriNetUnfolder]: For 61811/62357 co-relation queries the response was YES. [2022-07-19 21:29:40,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30128 conditions, 6338 events. 1603/6338 cut-off events. For 61811/62357 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 67958 event pairs, 372 based on Foata normal form. 113/6203 useless extension candidates. Maximal degree in co-relation 30062. Up to 785 conditions per place. [2022-07-19 21:29:40,047 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 47 selfloop transitions, 35 changer transitions 4/272 dead transitions. [2022-07-19 21:29:40,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 272 transitions, 2228 flow [2022-07-19 21:29:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:29:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:29:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 934 transitions. [2022-07-19 21:29:40,050 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8164335664335665 [2022-07-19 21:29:40,051 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 934 transitions. [2022-07-19 21:29:40,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 934 transitions. [2022-07-19 21:29:40,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:40,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 934 transitions. [2022-07-19 21:29:40,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.9090909090909) internal successors, (934), 11 states have internal predecessors, (934), 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) [2022-07-19 21:29:40,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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) [2022-07-19 21:29:40,057 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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) [2022-07-19 21:29:40,057 INFO L186 Difference]: Start difference. First operand has 222 places, 222 transitions, 1799 flow. Second operand 11 states and 934 transitions. [2022-07-19 21:29:40,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 272 transitions, 2228 flow [2022-07-19 21:29:40,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 272 transitions, 2147 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-07-19 21:29:40,247 INFO L242 Difference]: Finished difference. Result has 228 places, 237 transitions, 1921 flow [2022-07-19 21:29:40,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1921, PETRI_PLACES=228, PETRI_TRANSITIONS=237} [2022-07-19 21:29:40,249 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 136 predicate places. [2022-07-19 21:29:40,249 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 237 transitions, 1921 flow [2022-07-19 21:29:40,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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) [2022-07-19 21:29:40,249 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:40,250 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:40,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:29:40,463 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,SelfDestructingSolverStorable12 [2022-07-19 21:29:40,463 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1128249126, now seen corresponding path program 3 times [2022-07-19 21:29:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:40,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202233209] [2022-07-19 21:29:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:40,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:40,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:40,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202233209] [2022-07-19 21:29:40,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202233209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:40,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937800229] [2022-07-19 21:29:40,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:29:40,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:40,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:40,608 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) [2022-07-19 21:29:40,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:29:40,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:29:40,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:29:40,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 21:29:40,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:40,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:40,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937800229] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:40,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:40,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-19 21:29:40,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885890736] [2022-07-19 21:29:40,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:40,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:29:40,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:40,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:29:40,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:29:40,968 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-19 21:29:40,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 237 transitions, 1921 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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) [2022-07-19 21:29:40,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:40,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-19 21:29:40,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:42,615 INFO L129 PetriNetUnfolder]: 1998/8151 cut-off events. [2022-07-19 21:29:42,616 INFO L130 PetriNetUnfolder]: For 80698/81392 co-relation queries the response was YES. [2022-07-19 21:29:42,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38650 conditions, 8151 events. 1998/8151 cut-off events. For 80698/81392 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 93127 event pairs, 520 based on Foata normal form. 126/7957 useless extension candidates. Maximal degree in co-relation 38582. Up to 1104 conditions per place. [2022-07-19 21:29:42,706 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 72 selfloop transitions, 27 changer transitions 4/289 dead transitions. [2022-07-19 21:29:42,707 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 289 transitions, 2414 flow [2022-07-19 21:29:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:29:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:29:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 931 transitions. [2022-07-19 21:29:42,709 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138111888111889 [2022-07-19 21:29:42,709 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 931 transitions. [2022-07-19 21:29:42,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 931 transitions. [2022-07-19 21:29:42,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:42,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 931 transitions. [2022-07-19 21:29:42,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.63636363636364) internal successors, (931), 11 states have internal predecessors, (931), 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) [2022-07-19 21:29:42,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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) [2022-07-19 21:29:42,713 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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) [2022-07-19 21:29:42,713 INFO L186 Difference]: Start difference. First operand has 228 places, 237 transitions, 1921 flow. Second operand 11 states and 931 transitions. [2022-07-19 21:29:42,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 289 transitions, 2414 flow [2022-07-19 21:29:42,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 289 transitions, 2326 flow, removed 34 selfloop flow, removed 6 redundant places. [2022-07-19 21:29:42,978 INFO L242 Difference]: Finished difference. Result has 234 places, 253 transitions, 2060 flow [2022-07-19 21:29:42,979 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2060, PETRI_PLACES=234, PETRI_TRANSITIONS=253} [2022-07-19 21:29:42,979 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 142 predicate places. [2022-07-19 21:29:42,979 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 253 transitions, 2060 flow [2022-07-19 21:29:42,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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) [2022-07-19 21:29:42,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:42,980 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:43,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:29:43,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:43,195 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:43,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash 409894142, now seen corresponding path program 1 times [2022-07-19 21:29:43,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:43,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48215904] [2022-07-19 21:29:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:43,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:43,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:43,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48215904] [2022-07-19 21:29:43,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48215904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:43,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:43,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:29:43,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906828330] [2022-07-19 21:29:43,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:43,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:29:43,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:43,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:29:43,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:29:43,270 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-19 21:29:43,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 253 transitions, 2060 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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) [2022-07-19 21:29:43,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:43,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-19 21:29:43,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:44,613 INFO L129 PetriNetUnfolder]: 2124/8002 cut-off events. [2022-07-19 21:29:44,614 INFO L130 PetriNetUnfolder]: For 79350/79767 co-relation queries the response was YES. [2022-07-19 21:29:44,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38630 conditions, 8002 events. 2124/8002 cut-off events. For 79350/79767 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 89616 event pairs, 475 based on Foata normal form. 191/7895 useless extension candidates. Maximal degree in co-relation 38560. Up to 1057 conditions per place. [2022-07-19 21:29:44,699 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 80 selfloop transitions, 6 changer transitions 0/296 dead transitions. [2022-07-19 21:29:44,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 296 transitions, 2530 flow [2022-07-19 21:29:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:29:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:29:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2022-07-19 21:29:44,700 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9014423076923077 [2022-07-19 21:29:44,701 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2022-07-19 21:29:44,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2022-07-19 21:29:44,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:44,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2022-07-19 21:29:44,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 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) [2022-07-19 21:29:44,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2022-07-19 21:29:44,703 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2022-07-19 21:29:44,703 INFO L186 Difference]: Start difference. First operand has 234 places, 253 transitions, 2060 flow. Second operand 4 states and 375 transitions. [2022-07-19 21:29:44,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 296 transitions, 2530 flow [2022-07-19 21:29:44,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 296 transitions, 2493 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-19 21:29:44,939 INFO L242 Difference]: Finished difference. Result has 232 places, 253 transitions, 2059 flow [2022-07-19 21:29:44,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2059, PETRI_PLACES=232, PETRI_TRANSITIONS=253} [2022-07-19 21:29:44,940 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 140 predicate places. [2022-07-19 21:29:44,940 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 253 transitions, 2059 flow [2022-07-19 21:29:44,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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) [2022-07-19 21:29:44,940 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:44,941 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:44,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:29:44,941 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash 184085024, now seen corresponding path program 4 times [2022-07-19 21:29:44,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:44,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027244866] [2022-07-19 21:29:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:44,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:45,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027244866] [2022-07-19 21:29:45,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027244866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429701220] [2022-07-19 21:29:45,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:29:45,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:45,102 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) [2022-07-19 21:29:45,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:29:45,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:29:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:29:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 21:29:45,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:45,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:45,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429701220] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:45,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:45,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-19 21:29:45,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777050428] [2022-07-19 21:29:45,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:45,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:29:45,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:29:45,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:29:45,402 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-19 21:29:45,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 253 transitions, 2059 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 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) [2022-07-19 21:29:45,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:45,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-19 21:29:45,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:46,676 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([253] L44-->L51: Formula: (= v_~pos~0_23 (+ v_~pos~0_24 1)) InVars {~pos~0=v_~pos~0_24} OutVars{thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_1|, ~pos~0=v_~pos~0_23} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post1, ~pos~0][125], [1259#(not (= (+ ~d1~0 (* (- 256) (div ~d1~0 256))) 0)), Black: 640#(and (<= (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296)))) (<= (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0) (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0))), Black: 631#true, 1843#(not (= (+ (* (- 256) (div ~d2~0 256)) ~d2~0) 0)), 1586#(< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)), Black: 1826#(and (<= ~i2~0 (+ (* (div (+ (- 1) ~i2~0) 4294967296) 4294967296) 1)) (<= |thread2Thread1of1ForFork1_#t~post4| (* (div |thread2Thread1of1ForFork1_#t~post4| 4294967296) 4294967296)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1270#(and (<= ~i2~0 (* (div ~i2~0 4294967296) 4294967296)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1265#true, Black: 1501#(and (<= ~i2~0 (+ (* (div (+ (- 1) ~i2~0) 4294967296) 4294967296) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 6#L94-4true, 1837#(and (<= (div ~d1~0 256) 0) (<= 1 ~d1~0)), Black: 1834#true, 3656#true, Black: 1844#(and (<= ~d2~0 (* (div ~d2~0 256) 256)) (<= 0 ~d2~0)), Black: 1841#true, Black: 3052#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 3053#(<= ~pos~0 (+ (* (div (+ (- 1) ~pos~0) 4294967296) 4294967296) 1)), Black: 3649#true, 131#(<= (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296))), Black: 1166#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1198#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1))), Black: 1208#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1204#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1))), Black: 1212#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 618#true, Black: 1178#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1202#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1186#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), 106#true, Black: 1210#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1196#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1206#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 603#true, Black: 1168#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1162#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 592#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 126#true, Black: 652#(and (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1192#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 264#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod ~i2~0 4294967296) 0)), Black: 594#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 1182#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), 3048#true, Black: 1194#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 650#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1188#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1170#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1176#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1214#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1200#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 645#true, 8#L51true, Black: 1220#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 941#(< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)), Black: 1174#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 59#L70true, Black: 868#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (< (mod (+ 4294967295 ~i2~0) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 2452#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1190#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 608#(<= (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))) (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))), Black: 1172#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 2448#true, Black: 1164#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 610#(and (<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0)) (<= (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))) (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296))))), Black: 607#(<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0)), 1849#true, Black: 1257#true, Black: 1260#(and (not (<= (+ (div ~d1~0 256) 1) 0)) (<= ~d1~0 (* 256 (div ~d1~0 256)))), Black: 623#(<= (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296)) (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))), Black: 627#(and (<= (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296)) (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))) (<= (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0) (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0))), 3652#(and (<= (div ~d2~0 256) 0) (<= 1 ~d2~0)), Black: 113#(= (+ (* (- 4294967296) (div ~pos~0 4294967296)) ~pos~0) 0), 636#(<= (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))))]) [2022-07-19 21:29:46,678 INFO L384 tUnfolder$Statistics]: this new event has 96 ancestors and is cut-off event [2022-07-19 21:29:46,678 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-19 21:29:46,678 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-19 21:29:46,678 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-19 21:29:46,883 INFO L129 PetriNetUnfolder]: 1872/7710 cut-off events. [2022-07-19 21:29:46,883 INFO L130 PetriNetUnfolder]: For 79989/80605 co-relation queries the response was YES. [2022-07-19 21:29:46,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37808 conditions, 7710 events. 1872/7710 cut-off events. For 79989/80605 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 87447 event pairs, 541 based on Foata normal form. 126/7500 useless extension candidates. Maximal degree in co-relation 37738. Up to 1226 conditions per place. [2022-07-19 21:29:46,978 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 76 selfloop transitions, 27 changer transitions 4/295 dead transitions. [2022-07-19 21:29:46,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 295 transitions, 2485 flow [2022-07-19 21:29:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:29:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:29:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2022-07-19 21:29:46,981 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2022-07-19 21:29:46,981 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2022-07-19 21:29:46,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2022-07-19 21:29:46,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:46,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2022-07-19 21:29:46,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 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) [2022-07-19 21:29:46,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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) [2022-07-19 21:29:46,985 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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) [2022-07-19 21:29:46,986 INFO L186 Difference]: Start difference. First operand has 232 places, 253 transitions, 2059 flow. Second operand 10 states and 843 transitions. [2022-07-19 21:29:46,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 295 transitions, 2485 flow [2022-07-19 21:29:47,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 295 transitions, 2485 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:29:47,200 INFO L242 Difference]: Finished difference. Result has 246 places, 271 transitions, 2289 flow [2022-07-19 21:29:47,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2289, PETRI_PLACES=246, PETRI_TRANSITIONS=271} [2022-07-19 21:29:47,201 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 154 predicate places. [2022-07-19 21:29:47,201 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 271 transitions, 2289 flow [2022-07-19 21:29:47,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 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) [2022-07-19 21:29:47,202 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:47,202 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:47,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:29:47,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:47,425 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:47,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:47,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1699141446, now seen corresponding path program 5 times [2022-07-19 21:29:47,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:47,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485883529] [2022-07-19 21:29:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:47,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:47,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:47,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485883529] [2022-07-19 21:29:47,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485883529] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:47,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625576317] [2022-07-19 21:29:47,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:29:47,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:47,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:47,569 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) [2022-07-19 21:29:47,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:29:47,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 21:29:47,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:29:47,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 21:29:47,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:47,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:47,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625576317] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:47,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:47,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-19 21:29:47,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298753325] [2022-07-19 21:29:47,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:47,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:29:47,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:47,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:29:47,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:29:47,913 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-19 21:29:47,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 271 transitions, 2289 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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) [2022-07-19 21:29:47,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:47,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-19 21:29:47,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:49,649 INFO L129 PetriNetUnfolder]: 2333/9545 cut-off events. [2022-07-19 21:29:49,650 INFO L130 PetriNetUnfolder]: For 102247/103107 co-relation queries the response was YES. [2022-07-19 21:29:49,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47581 conditions, 9545 events. 2333/9545 cut-off events. For 102247/103107 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 112166 event pairs, 613 based on Foata normal form. 245/9401 useless extension candidates. Maximal degree in co-relation 47505. Up to 1300 conditions per place. [2022-07-19 21:29:49,746 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 75 selfloop transitions, 61 changer transitions 4/328 dead transitions. [2022-07-19 21:29:49,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 328 transitions, 2918 flow [2022-07-19 21:29:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:29:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:29:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 933 transitions. [2022-07-19 21:29:49,748 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8155594405594405 [2022-07-19 21:29:49,749 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 933 transitions. [2022-07-19 21:29:49,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 933 transitions. [2022-07-19 21:29:49,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:49,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 933 transitions. [2022-07-19 21:29:49,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.81818181818181) internal successors, (933), 11 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) [2022-07-19 21:29:49,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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) [2022-07-19 21:29:49,753 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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) [2022-07-19 21:29:49,753 INFO L186 Difference]: Start difference. First operand has 246 places, 271 transitions, 2289 flow. Second operand 11 states and 933 transitions. [2022-07-19 21:29:49,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 328 transitions, 2918 flow [2022-07-19 21:29:50,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 328 transitions, 2883 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-19 21:29:50,010 INFO L242 Difference]: Finished difference. Result has 255 places, 293 transitions, 2698 flow [2022-07-19 21:29:50,011 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2268, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2698, PETRI_PLACES=255, PETRI_TRANSITIONS=293} [2022-07-19 21:29:50,011 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 163 predicate places. [2022-07-19 21:29:50,012 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 293 transitions, 2698 flow [2022-07-19 21:29:50,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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) [2022-07-19 21:29:50,012 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:50,012 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:50,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:29:50,227 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,SelfDestructingSolverStorable16 [2022-07-19 21:29:50,227 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:50,228 INFO L85 PathProgramCache]: Analyzing trace with hash -110206322, now seen corresponding path program 6 times [2022-07-19 21:29:50,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:50,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311431157] [2022-07-19 21:29:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:50,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:50,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:50,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311431157] [2022-07-19 21:29:50,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311431157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:50,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500386313] [2022-07-19 21:29:50,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:29:50,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:50,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:50,375 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) [2022-07-19 21:29:50,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:29:50,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-19 21:29:50,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:29:50,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 21:29:50,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:50,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:50,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500386313] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:50,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:50,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-19 21:29:50,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604492813] [2022-07-19 21:29:50,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:50,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:29:50,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:29:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:29:50,814 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-19 21:29:50,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 293 transitions, 2698 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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) [2022-07-19 21:29:50,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:50,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-19 21:29:50,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:52,899 INFO L129 PetriNetUnfolder]: 2497/10270 cut-off events. [2022-07-19 21:29:52,899 INFO L130 PetriNetUnfolder]: For 115350/116438 co-relation queries the response was YES. [2022-07-19 21:29:52,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52490 conditions, 10270 events. 2497/10270 cut-off events. For 115350/116438 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 122677 event pairs, 676 based on Foata normal form. 259/10117 useless extension candidates. Maximal degree in co-relation 52409. Up to 1413 conditions per place. [2022-07-19 21:29:53,017 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 112 selfloop transitions, 39 changer transitions 4/343 dead transitions. [2022-07-19 21:29:53,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 343 transitions, 3327 flow [2022-07-19 21:29:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:29:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:29:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 931 transitions. [2022-07-19 21:29:53,019 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138111888111889 [2022-07-19 21:29:53,019 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 931 transitions. [2022-07-19 21:29:53,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 931 transitions. [2022-07-19 21:29:53,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:53,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 931 transitions. [2022-07-19 21:29:53,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.63636363636364) internal successors, (931), 11 states have internal predecessors, (931), 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) [2022-07-19 21:29:53,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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) [2022-07-19 21:29:53,022 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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) [2022-07-19 21:29:53,022 INFO L186 Difference]: Start difference. First operand has 255 places, 293 transitions, 2698 flow. Second operand 11 states and 931 transitions. [2022-07-19 21:29:53,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 343 transitions, 3327 flow [2022-07-19 21:29:53,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 343 transitions, 3260 flow, removed 29 selfloop flow, removed 5 redundant places. [2022-07-19 21:29:53,306 INFO L242 Difference]: Finished difference. Result has 263 places, 307 transitions, 2930 flow [2022-07-19 21:29:53,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2930, PETRI_PLACES=263, PETRI_TRANSITIONS=307} [2022-07-19 21:29:53,307 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 171 predicate places. [2022-07-19 21:29:53,307 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 307 transitions, 2930 flow [2022-07-19 21:29:53,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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) [2022-07-19 21:29:53,308 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:53,308 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:53,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:29:53,513 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,SelfDestructingSolverStorable17 [2022-07-19 21:29:53,514 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:53,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:53,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2103120229, now seen corresponding path program 7 times [2022-07-19 21:29:53,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:53,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11493824] [2022-07-19 21:29:53,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:53,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:54,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11493824] [2022-07-19 21:29:54,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11493824] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876540217] [2022-07-19 21:29:54,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:29:54,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:54,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:54,112 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) [2022-07-19 21:29:54,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:29:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:54,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 21:29:54,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:55,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:57,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876540217] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:57,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:57,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-07-19 21:29:57,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418675555] [2022-07-19 21:29:57,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:57,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 21:29:57,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:57,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 21:29:57,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 21:29:57,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-07-19 21:29:57,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 307 transitions, 2930 flow. Second operand has 38 states, 38 states have (on average 65.86842105263158) internal successors, (2503), 38 states have internal predecessors, (2503), 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) [2022-07-19 21:29:57,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:57,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-07-19 21:29:57,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:30:16,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 21:30:56,548 INFO L129 PetriNetUnfolder]: 8004/24504 cut-off events. [2022-07-19 21:30:56,548 INFO L130 PetriNetUnfolder]: For 307428/307620 co-relation queries the response was YES. [2022-07-19 21:30:56,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138898 conditions, 24504 events. 8004/24504 cut-off events. For 307428/307620 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 303650 event pairs, 717 based on Foata normal form. 429/24873 useless extension candidates. Maximal degree in co-relation 138813. Up to 5384 conditions per place. [2022-07-19 21:30:56,823 INFO L132 encePairwiseOnDemand]: 84/104 looper letters, 868 selfloop transitions, 335 changer transitions 0/1266 dead transitions. [2022-07-19 21:30:56,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1266 transitions, 16029 flow [2022-07-19 21:30:56,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-19 21:30:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-07-19 21:30:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 6529 transitions. [2022-07-19 21:30:56,831 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.66082995951417 [2022-07-19 21:30:56,831 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 6529 transitions. [2022-07-19 21:30:56,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 6529 transitions. [2022-07-19 21:30:56,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:30:56,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 6529 transitions. [2022-07-19 21:30:56,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 68.72631578947369) internal successors, (6529), 95 states have internal predecessors, (6529), 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) [2022-07-19 21:30:56,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 104.0) internal successors, (9984), 96 states have internal predecessors, (9984), 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) [2022-07-19 21:30:56,853 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 104.0) internal successors, (9984), 96 states have internal predecessors, (9984), 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) [2022-07-19 21:30:56,853 INFO L186 Difference]: Start difference. First operand has 263 places, 307 transitions, 2930 flow. Second operand 95 states and 6529 transitions. [2022-07-19 21:30:56,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1266 transitions, 16029 flow [2022-07-19 21:30:58,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1266 transitions, 15900 flow, removed 52 selfloop flow, removed 6 redundant places. [2022-07-19 21:30:58,091 INFO L242 Difference]: Finished difference. Result has 389 places, 588 transitions, 7784 flow [2022-07-19 21:30:58,092 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=7784, PETRI_PLACES=389, PETRI_TRANSITIONS=588} [2022-07-19 21:30:58,092 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 297 predicate places. [2022-07-19 21:30:58,092 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 588 transitions, 7784 flow [2022-07-19 21:30:58,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 65.86842105263158) internal successors, (2503), 38 states have internal predecessors, (2503), 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) [2022-07-19 21:30:58,093 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:30:58,093 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:30:58,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:30:58,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:30:58,295 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:30:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:30:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash 88614813, now seen corresponding path program 8 times [2022-07-19 21:30:58,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:30:58,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13807761] [2022-07-19 21:30:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:30:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:30:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:30:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:30:58,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:30:58,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13807761] [2022-07-19 21:30:58,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13807761] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:30:58,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18902187] [2022-07-19 21:30:58,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:30:58,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:30:58,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:30:58,678 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) [2022-07-19 21:30:58,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:30:58,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:30:58,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:30:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 21:30:58,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:30:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:30:59,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:31:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:02,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18902187] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:31:02,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:31:02,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 39 [2022-07-19 21:31:02,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107348215] [2022-07-19 21:31:02,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:31:02,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 21:31:02,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:02,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 21:31:02,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 21:31:02,791 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-07-19 21:31:02,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 588 transitions, 7784 flow. Second operand has 39 states, 39 states have (on average 65.7948717948718) internal successors, (2566), 39 states have internal predecessors, (2566), 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) [2022-07-19 21:31:02,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:02,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-07-19 21:31:02,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:01,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 21:33:38,668 INFO L129 PetriNetUnfolder]: 17113/51187 cut-off events. [2022-07-19 21:33:38,669 INFO L130 PetriNetUnfolder]: For 1209079/1209579 co-relation queries the response was YES. [2022-07-19 21:33:39,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 361630 conditions, 51187 events. 17113/51187 cut-off events. For 1209079/1209579 co-relation queries the response was YES. Maximal size of possible extension queue 2386. Compared 707714 event pairs, 1822 based on Foata normal form. 1048/52056 useless extension candidates. Maximal degree in co-relation 361508. Up to 10773 conditions per place. [2022-07-19 21:33:39,994 INFO L132 encePairwiseOnDemand]: 81/104 looper letters, 1391 selfloop transitions, 757 changer transitions 0/2211 dead transitions. [2022-07-19 21:33:39,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 2211 transitions, 34185 flow [2022-07-19 21:33:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-19 21:33:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-07-19 21:33:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 6451 transitions. [2022-07-19 21:33:40,001 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6598813420621932 [2022-07-19 21:33:40,002 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 6451 transitions. [2022-07-19 21:33:40,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 6451 transitions. [2022-07-19 21:33:40,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:40,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 6451 transitions. [2022-07-19 21:33:40,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 68.62765957446808) internal successors, (6451), 94 states have internal predecessors, (6451), 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) [2022-07-19 21:33:40,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 104.0) internal successors, (9880), 95 states have internal predecessors, (9880), 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) [2022-07-19 21:33:40,023 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 104.0) internal successors, (9880), 95 states have internal predecessors, (9880), 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) [2022-07-19 21:33:40,023 INFO L186 Difference]: Start difference. First operand has 389 places, 588 transitions, 7784 flow. Second operand 94 states and 6451 transitions. [2022-07-19 21:33:40,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 2211 transitions, 34185 flow