./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/popl20-mult-equiv.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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:18:06,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:18:06,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:18:06,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:18:06,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:18:06,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:18:06,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:18:06,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:18:06,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:18:06,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:18:06,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:18:06,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:18:06,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:18:06,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:18:06,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:18:06,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:18:06,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:18:06,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:18:06,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:18:06,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:18:06,669 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:18:06,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:18:06,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:18:06,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:18:06,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:18:06,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:18:06,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:18:06,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:18:06,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:18:06,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:18:06,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:18:06,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:18:06,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:18:06,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:18:06,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:18:06,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:18:06,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:18:06,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:18:06,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:18:06,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:18:06,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:18:06,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:18:06,686 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:18:06,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:18:06,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:18:06,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:18:06,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:18:06,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:18:06,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:18:06,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:18:06,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:18:06,716 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:18:06,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:18:06,717 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:18:06,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:18:06,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:18:06,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:18:06,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:18:06,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:18:06,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:18:06,719 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:18:06,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:18:06,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:18:06,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:18:06,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:18:06,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:18:06,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:18:06,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:18:06,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:18:06,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:18:06,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:18:06,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:18:06,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:18:06,722 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:18:06,722 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:18:06,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:18:06,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2022-07-13 22:18:06,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:18:06,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:18:06,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:18:06,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:18:06,971 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:18:06,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-07-13 22:18:07,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf2cd4ead/8d6c8435614a46f988e310d6c5042496/FLAG40e68fd0d [2022-07-13 22:18:07,374 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:18:07,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-07-13 22:18:07,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf2cd4ead/8d6c8435614a46f988e310d6c5042496/FLAG40e68fd0d [2022-07-13 22:18:07,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf2cd4ead/8d6c8435614a46f988e310d6c5042496 [2022-07-13 22:18:07,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:18:07,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:18:07,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:18:07,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:18:07,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:18:07,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:18:07" (1/1) ... [2022-07-13 22:18:07,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632d5969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:07, skipping insertion in model container [2022-07-13 22:18:07,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:18:07" (1/1) ... [2022-07-13 22:18:07,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:18:07,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:18:08,005 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/popl20-mult-equiv.wvr.c[2591,2604] [2022-07-13 22:18:08,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:18:08,018 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:18:08,057 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/popl20-mult-equiv.wvr.c[2591,2604] [2022-07-13 22:18:08,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:18:08,072 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:18:08,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08 WrapperNode [2022-07-13 22:18:08,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:18:08,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:18:08,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:18:08,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:18:08,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08" (1/1) ... [2022-07-13 22:18:08,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08" (1/1) ... [2022-07-13 22:18:08,116 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-07-13 22:18:08,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:18:08,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:18:08,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:18:08,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:18:08,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08" (1/1) ... [2022-07-13 22:18:08,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08" (1/1) ... [2022-07-13 22:18:08,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08" (1/1) ... [2022-07-13 22:18:08,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08" (1/1) ... [2022-07-13 22:18:08,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08" (1/1) ... [2022-07-13 22:18:08,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08" (1/1) ... [2022-07-13 22:18:08,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08" (1/1) ... [2022-07-13 22:18:08,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:18:08,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:18:08,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:18:08,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:18:08,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08" (1/1) ... [2022-07-13 22:18:08,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:18:08,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:08,176 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) [2022-07-13 22:18:08,182 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 [2022-07-13 22:18:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:18:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:18:08,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:18:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:18:08,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:18:08,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 22:18:08,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 22:18:08,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:18:08,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:18:08,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:18:08,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:18:08,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:18:08,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:18:08,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:18:08,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:18:08,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:18:08,210 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:18:08,271 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:18:08,273 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:18:08,417 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:18:08,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:18:08,459 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 22:18:08,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:18:08 BoogieIcfgContainer [2022-07-13 22:18:08,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:18:08,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:18:08,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:18:08,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:18:08,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:18:07" (1/3) ... [2022-07-13 22:18:08,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be35bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:18:08, skipping insertion in model container [2022-07-13 22:18:08,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:08" (2/3) ... [2022-07-13 22:18:08,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be35bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:18:08, skipping insertion in model container [2022-07-13 22:18:08,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:18:08" (3/3) ... [2022-07-13 22:18:08,469 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2022-07-13 22:18:08,473 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:18:08,481 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:18:08,481 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:18:08,482 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:18:08,538 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 22:18:08,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2022-07-13 22:18:08,631 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-07-13 22:18:08,631 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 22:18:08,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-07-13 22:18:08,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2022-07-13 22:18:08,643 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2022-07-13 22:18:08,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:18:08,665 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@f0381c4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@390ee8c9 [2022-07-13 22:18:08,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 22:18:08,697 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2022-07-13 22:18:08,698 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 22:18:08,698 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:08,699 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] [2022-07-13 22:18:08,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:08,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1408875064, now seen corresponding path program 1 times [2022-07-13 22:18:08,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:08,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056988077] [2022-07-13 22:18:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:08,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:08,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:08,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056988077] [2022-07-13 22:18:08,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056988077] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:08,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:08,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:18:08,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584107298] [2022-07-13 22:18:08,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:08,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:18:08,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:08,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:18:08,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:18:08,996 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2022-07-13 22:18:09,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:09,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:09,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2022-07-13 22:18:09,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:09,064 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2022-07-13 22:18:09,064 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2022-07-13 22:18:09,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 254 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2022-07-13 22:18:09,101 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2022-07-13 22:18:09,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2022-07-13 22:18:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:18:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:18:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2022-07-13 22:18:09,124 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2022-07-13 22:18:09,124 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2022-07-13 22:18:09,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2022-07-13 22:18:09,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:09,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2022-07-13 22:18:09,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:09,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:09,137 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:09,138 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2022-07-13 22:18:09,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2022-07-13 22:18:09,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 22:18:09,148 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2022-07-13 22:18:09,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2022-07-13 22:18:09,153 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2022-07-13 22:18:09,154 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2022-07-13 22:18:09,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:09,155 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:09,155 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] [2022-07-13 22:18:09,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:18:09,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:09,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1685090523, now seen corresponding path program 1 times [2022-07-13 22:18:09,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:09,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967502028] [2022-07-13 22:18:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:09,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:09,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:09,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967502028] [2022-07-13 22:18:09,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967502028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:09,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:09,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:18:09,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031460313] [2022-07-13 22:18:09,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:09,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:18:09,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:18:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:18:09,393 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2022-07-13 22:18:09,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:09,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:09,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2022-07-13 22:18:09,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:09,524 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2022-07-13 22:18:09,525 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-07-13 22:18:09,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 483 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2022-07-13 22:18:09,530 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2022-07-13 22:18:09,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2022-07-13 22:18:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-07-13 22:18:09,536 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-07-13 22:18:09,537 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-07-13 22:18:09,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-07-13 22:18:09,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:09,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-07-13 22:18:09,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:09,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:09,545 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:09,545 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2022-07-13 22:18:09,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2022-07-13 22:18:09,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:18:09,549 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2022-07-13 22:18:09,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-07-13 22:18:09,550 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2022-07-13 22:18:09,551 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2022-07-13 22:18:09,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:09,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:09,552 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] [2022-07-13 22:18:09,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:18:09,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:09,555 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2022-07-13 22:18:09,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:09,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144052228] [2022-07-13 22:18:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:09,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:09,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:09,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144052228] [2022-07-13 22:18:09,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144052228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:09,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:09,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:18:09,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541826038] [2022-07-13 22:18:09,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:09,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:18:09,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:09,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:18:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:18:09,794 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-13 22:18:09,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:09,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:09,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-13 22:18:09,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:10,122 INFO L129 PetriNetUnfolder]: 297/760 cut-off events. [2022-07-13 22:18:10,122 INFO L130 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2022-07-13 22:18:10,124 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4076 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2022-07-13 22:18:10,130 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2022-07-13 22:18:10,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2022-07-13 22:18:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:18:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:18:10,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2022-07-13 22:18:10,134 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2022-07-13 22:18:10,135 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2022-07-13 22:18:10,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2022-07-13 22:18:10,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:10,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2022-07-13 22:18:10,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:10,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:10,139 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:10,139 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2022-07-13 22:18:10,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2022-07-13 22:18:10,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-13 22:18:10,148 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2022-07-13 22:18:10,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-07-13 22:18:10,151 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2022-07-13 22:18:10,151 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2022-07-13 22:18:10,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:10,151 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:10,152 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] [2022-07-13 22:18:10,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:18:10,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:10,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:10,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1580608891, now seen corresponding path program 2 times [2022-07-13 22:18:10,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:10,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105203668] [2022-07-13 22:18:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:10,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:10,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:10,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105203668] [2022-07-13 22:18:10,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105203668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:10,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:10,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:18:10,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483511963] [2022-07-13 22:18:10,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:10,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:18:10,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:18:10,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:18:10,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-13 22:18:10,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:10,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:10,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-13 22:18:10,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:10,478 INFO L129 PetriNetUnfolder]: 371/890 cut-off events. [2022-07-13 22:18:10,478 INFO L130 PetriNetUnfolder]: For 450/454 co-relation queries the response was YES. [2022-07-13 22:18:10,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 890 events. 371/890 cut-off events. For 450/454 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4794 event pairs, 71 based on Foata normal form. 18/843 useless extension candidates. Maximal degree in co-relation 2091. Up to 395 conditions per place. [2022-07-13 22:18:10,486 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 53 selfloop transitions, 21 changer transitions 2/133 dead transitions. [2022-07-13 22:18:10,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 628 flow [2022-07-13 22:18:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2022-07-13 22:18:10,489 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-07-13 22:18:10,489 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2022-07-13 22:18:10,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2022-07-13 22:18:10,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:10,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2022-07-13 22:18:10,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:10,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:10,493 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:10,493 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 485 transitions. [2022-07-13 22:18:10,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 628 flow [2022-07-13 22:18:10,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:18:10,499 INFO L242 Difference]: Finished difference. Result has 104 places, 108 transitions, 469 flow [2022-07-13 22:18:10,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2022-07-13 22:18:10,500 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2022-07-13 22:18:10,500 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 469 flow [2022-07-13 22:18:10,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:10,500 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:10,501 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] [2022-07-13 22:18:10,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:18:10,501 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:10,502 INFO L85 PathProgramCache]: Analyzing trace with hash -599492455, now seen corresponding path program 3 times [2022-07-13 22:18:10,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:10,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935653448] [2022-07-13 22:18:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:10,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:10,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:10,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935653448] [2022-07-13 22:18:10,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935653448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:10,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:10,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:18:10,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971216824] [2022-07-13 22:18:10,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:10,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:18:10,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:10,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:18:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:18:10,641 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-13 22:18:10,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:10,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:10,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-13 22:18:10,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:11,004 INFO L129 PetriNetUnfolder]: 576/1349 cut-off events. [2022-07-13 22:18:11,005 INFO L130 PetriNetUnfolder]: For 998/1042 co-relation queries the response was YES. [2022-07-13 22:18:11,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1349 events. 576/1349 cut-off events. For 998/1042 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8232 event pairs, 89 based on Foata normal form. 19/1297 useless extension candidates. Maximal degree in co-relation 3275. Up to 389 conditions per place. [2022-07-13 22:18:11,018 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 70 selfloop transitions, 38 changer transitions 2/167 dead transitions. [2022-07-13 22:18:11,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 917 flow [2022-07-13 22:18:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:18:11,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:18:11,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 731 transitions. [2022-07-13 22:18:11,021 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8373424971363116 [2022-07-13 22:18:11,021 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 731 transitions. [2022-07-13 22:18:11,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 731 transitions. [2022-07-13 22:18:11,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:11,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 731 transitions. [2022-07-13 22:18:11,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.22222222222223) internal successors, (731), 9 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 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) [2022-07-13 22:18:11,026 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 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) [2022-07-13 22:18:11,026 INFO L186 Difference]: Start difference. First operand has 104 places, 108 transitions, 469 flow. Second operand 9 states and 731 transitions. [2022-07-13 22:18:11,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 917 flow [2022-07-13 22:18:11,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 871 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-13 22:18:11,036 INFO L242 Difference]: Finished difference. Result has 116 places, 121 transitions, 671 flow [2022-07-13 22:18:11,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2022-07-13 22:18:11,039 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2022-07-13 22:18:11,039 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 671 flow [2022-07-13 22:18:11,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,040 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:11,040 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] [2022-07-13 22:18:11,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:18:11,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:11,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:11,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1430121317, now seen corresponding path program 4 times [2022-07-13 22:18:11,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:11,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654150809] [2022-07-13 22:18:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:11,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:11,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:11,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654150809] [2022-07-13 22:18:11,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654150809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:11,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:11,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:18:11,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803762040] [2022-07-13 22:18:11,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:11,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:18:11,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:18:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:18:11,167 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-13 22:18:11,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:11,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-13 22:18:11,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:11,437 INFO L129 PetriNetUnfolder]: 594/1403 cut-off events. [2022-07-13 22:18:11,437 INFO L130 PetriNetUnfolder]: For 2229/2242 co-relation queries the response was YES. [2022-07-13 22:18:11,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3959 conditions, 1403 events. 594/1403 cut-off events. For 2229/2242 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8721 event pairs, 155 based on Foata normal form. 16/1316 useless extension candidates. Maximal degree in co-relation 3938. Up to 527 conditions per place. [2022-07-13 22:18:11,451 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 64 selfloop transitions, 37 changer transitions 2/160 dead transitions. [2022-07-13 22:18:11,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1072 flow [2022-07-13 22:18:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:18:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:18:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2022-07-13 22:18:11,454 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2022-07-13 22:18:11,454 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2022-07-13 22:18:11,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2022-07-13 22:18:11,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:11,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2022-07-13 22:18:11,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,458 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,458 INFO L186 Difference]: Start difference. First operand has 116 places, 121 transitions, 671 flow. Second operand 8 states and 639 transitions. [2022-07-13 22:18:11,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1072 flow [2022-07-13 22:18:11,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1052 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-13 22:18:11,471 INFO L242 Difference]: Finished difference. Result has 124 places, 128 transitions, 818 flow [2022-07-13 22:18:11,472 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2022-07-13 22:18:11,472 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2022-07-13 22:18:11,473 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 818 flow [2022-07-13 22:18:11,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,473 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:11,473 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] [2022-07-13 22:18:11,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:18:11,474 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash -829555728, now seen corresponding path program 1 times [2022-07-13 22:18:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:11,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939053342] [2022-07-13 22:18:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:11,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:11,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:11,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939053342] [2022-07-13 22:18:11,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939053342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:11,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:11,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:18:11,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103435344] [2022-07-13 22:18:11,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:11,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:18:11,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:18:11,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:18:11,617 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-13 22:18:11,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 818 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:11,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-13 22:18:11,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:12,019 INFO L129 PetriNetUnfolder]: 671/1538 cut-off events. [2022-07-13 22:18:12,020 INFO L130 PetriNetUnfolder]: For 3129/3163 co-relation queries the response was YES. [2022-07-13 22:18:12,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4709 conditions, 1538 events. 671/1538 cut-off events. For 3129/3163 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9727 event pairs, 131 based on Foata normal form. 28/1481 useless extension candidates. Maximal degree in co-relation 4684. Up to 579 conditions per place. [2022-07-13 22:18:12,037 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 82 selfloop transitions, 30 changer transitions 2/171 dead transitions. [2022-07-13 22:18:12,037 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 1312 flow [2022-07-13 22:18:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:18:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:18:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2022-07-13 22:18:12,040 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8276877761413843 [2022-07-13 22:18:12,040 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2022-07-13 22:18:12,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2022-07-13 22:18:12,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:12,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2022-07-13 22:18:12,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:12,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:12,043 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:12,044 INFO L186 Difference]: Start difference. First operand has 124 places, 128 transitions, 818 flow. Second operand 7 states and 562 transitions. [2022-07-13 22:18:12,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 1312 flow [2022-07-13 22:18:12,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1228 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-13 22:18:12,059 INFO L242 Difference]: Finished difference. Result has 129 places, 131 transitions, 889 flow [2022-07-13 22:18:12,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2022-07-13 22:18:12,060 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 43 predicate places. [2022-07-13 22:18:12,060 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 889 flow [2022-07-13 22:18:12,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:12,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:12,061 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] [2022-07-13 22:18:12,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:18:12,062 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1761321142, now seen corresponding path program 2 times [2022-07-13 22:18:12,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:12,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068511659] [2022-07-13 22:18:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:12,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:12,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068511659] [2022-07-13 22:18:12,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068511659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:12,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:12,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 22:18:12,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329850438] [2022-07-13 22:18:12,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:12,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:18:12,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:18:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:18:12,403 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-13 22:18:12,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 889 flow. Second operand has 8 states, 8 states have (on average 71.25) internal successors, (570), 8 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:12,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:12,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-13 22:18:12,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:13,243 INFO L129 PetriNetUnfolder]: 1609/3278 cut-off events. [2022-07-13 22:18:13,243 INFO L130 PetriNetUnfolder]: For 9722/9800 co-relation queries the response was YES. [2022-07-13 22:18:13,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11498 conditions, 3278 events. 1609/3278 cut-off events. For 9722/9800 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23364 event pairs, 512 based on Foata normal form. 9/3005 useless extension candidates. Maximal degree in co-relation 11470. Up to 1864 conditions per place. [2022-07-13 22:18:13,280 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 114 selfloop transitions, 60 changer transitions 6/235 dead transitions. [2022-07-13 22:18:13,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 235 transitions, 2127 flow [2022-07-13 22:18:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:18:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:18:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 722 transitions. [2022-07-13 22:18:13,283 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.827033218785796 [2022-07-13 22:18:13,283 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 722 transitions. [2022-07-13 22:18:13,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 722 transitions. [2022-07-13 22:18:13,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:13,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 722 transitions. [2022-07-13 22:18:13,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.22222222222223) internal successors, (722), 9 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:13,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 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) [2022-07-13 22:18:13,289 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 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) [2022-07-13 22:18:13,289 INFO L186 Difference]: Start difference. First operand has 129 places, 131 transitions, 889 flow. Second operand 9 states and 722 transitions. [2022-07-13 22:18:13,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 235 transitions, 2127 flow [2022-07-13 22:18:13,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 235 transitions, 2076 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 22:18:13,365 INFO L242 Difference]: Finished difference. Result has 142 places, 168 transitions, 1575 flow [2022-07-13 22:18:13,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1575, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2022-07-13 22:18:13,366 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 56 predicate places. [2022-07-13 22:18:13,366 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1575 flow [2022-07-13 22:18:13,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 71.25) internal successors, (570), 8 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:13,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:13,367 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] [2022-07-13 22:18:13,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:18:13,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:13,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash 133163824, now seen corresponding path program 1 times [2022-07-13 22:18:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:13,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245504149] [2022-07-13 22:18:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:13,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:13,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:13,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245504149] [2022-07-13 22:18:13,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245504149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:13,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:13,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:18:13,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786683731] [2022-07-13 22:18:13,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:13,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:18:13,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:13,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:18:13,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:18:13,465 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-13 22:18:13,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1575 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:13,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:13,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-13 22:18:13,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:14,038 INFO L129 PetriNetUnfolder]: 1323/3152 cut-off events. [2022-07-13 22:18:14,039 INFO L130 PetriNetUnfolder]: For 11002/11304 co-relation queries the response was YES. [2022-07-13 22:18:14,055 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11658 conditions, 3152 events. 1323/3152 cut-off events. For 11002/11304 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25036 event pairs, 262 based on Foata normal form. 96/3141 useless extension candidates. Maximal degree in co-relation 11623. Up to 1104 conditions per place. [2022-07-13 22:18:14,077 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 64 selfloop transitions, 65 changer transitions 2/200 dead transitions. [2022-07-13 22:18:14,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 200 transitions, 1998 flow [2022-07-13 22:18:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-07-13 22:18:14,079 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-13 22:18:14,079 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-07-13 22:18:14,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-07-13 22:18:14,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:14,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-07-13 22:18:14,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:14,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:14,083 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:14,083 INFO L186 Difference]: Start difference. First operand has 142 places, 168 transitions, 1575 flow. Second operand 6 states and 486 transitions. [2022-07-13 22:18:14,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 200 transitions, 1998 flow [2022-07-13 22:18:14,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 200 transitions, 1946 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 22:18:14,145 INFO L242 Difference]: Finished difference. Result has 147 places, 173 transitions, 1774 flow [2022-07-13 22:18:14,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1774, PETRI_PLACES=147, PETRI_TRANSITIONS=173} [2022-07-13 22:18:14,146 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 61 predicate places. [2022-07-13 22:18:14,146 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 173 transitions, 1774 flow [2022-07-13 22:18:14,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:14,147 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:14,147 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] [2022-07-13 22:18:14,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 22:18:14,147 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:14,148 INFO L85 PathProgramCache]: Analyzing trace with hash -695560766, now seen corresponding path program 2 times [2022-07-13 22:18:14,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:14,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063312678] [2022-07-13 22:18:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:14,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:14,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:14,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063312678] [2022-07-13 22:18:14,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063312678] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:14,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:14,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:18:14,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395649897] [2022-07-13 22:18:14,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:14,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:18:14,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:18:14,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:18:14,260 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-13 22:18:14,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 173 transitions, 1774 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:14,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:14,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-13 22:18:14,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:14,718 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~q~0_14 v_~M~0_20))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][177], [Black: 122#(or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 190#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 192#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 123#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 131#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 187#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 127#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 225#true, 106#true, Black: 140#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (= ~N~0 ~L~0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 185#true, Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 67#L99-4true, 7#L83true, 103#true, Black: 211#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0)))), Black: 213#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 207#(and (<= 1 thread2Thread1of1ForFork1_~cond~1) (<= (div thread2Thread1of1ForFork1_~cond~1 256) 0)), Black: 215#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0))) (or (< (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 217#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), 120#true, Black: 209#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), 83#L64true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 157#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 159#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), 6#L46-1true, Black: 163#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 150#true, Black: 227#(or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 231#(and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 233#(and (= thread2Thread1of1ForFork1_~cond~1 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 175#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 180#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 176#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 238#true]) [2022-07-13 22:18:14,719 INFO L384 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-07-13 22:18:14,719 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-13 22:18:14,719 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-13 22:18:14,719 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-07-13 22:18:14,951 INFO L129 PetriNetUnfolder]: 1649/3706 cut-off events. [2022-07-13 22:18:14,951 INFO L130 PetriNetUnfolder]: For 18241/18640 co-relation queries the response was YES. [2022-07-13 22:18:14,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15719 conditions, 3706 events. 1649/3706 cut-off events. For 18241/18640 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 29394 event pairs, 179 based on Foata normal form. 127/3712 useless extension candidates. Maximal degree in co-relation 15682. Up to 1319 conditions per place. [2022-07-13 22:18:15,010 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 123 selfloop transitions, 105 changer transitions 2/299 dead transitions. [2022-07-13 22:18:15,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 299 transitions, 3896 flow [2022-07-13 22:18:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 491 transitions. [2022-07-13 22:18:15,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8436426116838488 [2022-07-13 22:18:15,014 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 491 transitions. [2022-07-13 22:18:15,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 491 transitions. [2022-07-13 22:18:15,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:15,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 491 transitions. [2022-07-13 22:18:15,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.83333333333333) internal successors, (491), 6 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:15,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:15,017 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:15,018 INFO L186 Difference]: Start difference. First operand has 147 places, 173 transitions, 1774 flow. Second operand 6 states and 491 transitions. [2022-07-13 22:18:15,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 299 transitions, 3896 flow [2022-07-13 22:18:15,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 299 transitions, 3726 flow, removed 17 selfloop flow, removed 2 redundant places. [2022-07-13 22:18:15,106 INFO L242 Difference]: Finished difference. Result has 154 places, 232 transitions, 2918 flow [2022-07-13 22:18:15,107 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2918, PETRI_PLACES=154, PETRI_TRANSITIONS=232} [2022-07-13 22:18:15,109 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 68 predicate places. [2022-07-13 22:18:15,109 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 232 transitions, 2918 flow [2022-07-13 22:18:15,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:15,110 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:15,110 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] [2022-07-13 22:18:15,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 22:18:15,111 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:15,111 INFO L85 PathProgramCache]: Analyzing trace with hash 140530238, now seen corresponding path program 3 times [2022-07-13 22:18:15,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:15,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291140360] [2022-07-13 22:18:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:15,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:15,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:15,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291140360] [2022-07-13 22:18:15,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291140360] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:15,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:15,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:18:15,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353335591] [2022-07-13 22:18:15,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:15,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:18:15,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:15,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:18:15,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:18:15,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-13 22:18:15,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 232 transitions, 2918 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:15,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:15,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-13 22:18:15,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:15,850 INFO L129 PetriNetUnfolder]: 1623/3657 cut-off events. [2022-07-13 22:18:15,851 INFO L130 PetriNetUnfolder]: For 20724/20780 co-relation queries the response was YES. [2022-07-13 22:18:15,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16891 conditions, 3657 events. 1623/3657 cut-off events. For 20724/20780 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28431 event pairs, 389 based on Foata normal form. 14/3562 useless extension candidates. Maximal degree in co-relation 16850. Up to 2302 conditions per place. [2022-07-13 22:18:15,897 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 121 selfloop transitions, 71 changer transitions 1/253 dead transitions. [2022-07-13 22:18:15,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 253 transitions, 3482 flow [2022-07-13 22:18:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:18:15,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:18:15,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 405 transitions. [2022-07-13 22:18:15,899 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-13 22:18:15,900 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 405 transitions. [2022-07-13 22:18:15,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 405 transitions. [2022-07-13 22:18:15,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:15,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 405 transitions. [2022-07-13 22:18:15,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:15,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 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) [2022-07-13 22:18:15,903 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 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) [2022-07-13 22:18:15,903 INFO L186 Difference]: Start difference. First operand has 154 places, 232 transitions, 2918 flow. Second operand 5 states and 405 transitions. [2022-07-13 22:18:15,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 253 transitions, 3482 flow [2022-07-13 22:18:15,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 253 transitions, 3448 flow, removed 17 selfloop flow, removed 0 redundant places. [2022-07-13 22:18:15,985 INFO L242 Difference]: Finished difference. Result has 160 places, 235 transitions, 3178 flow [2022-07-13 22:18:15,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3178, PETRI_PLACES=160, PETRI_TRANSITIONS=235} [2022-07-13 22:18:15,986 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 74 predicate places. [2022-07-13 22:18:15,986 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 235 transitions, 3178 flow [2022-07-13 22:18:15,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:15,987 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:15,987 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] [2022-07-13 22:18:15,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 22:18:15,987 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:15,988 INFO L85 PathProgramCache]: Analyzing trace with hash 540547268, now seen corresponding path program 3 times [2022-07-13 22:18:15,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:15,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895576397] [2022-07-13 22:18:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:15,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:16,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:16,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895576397] [2022-07-13 22:18:16,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895576397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:16,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:16,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:18:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591956415] [2022-07-13 22:18:16,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:16,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:18:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:18:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:18:16,164 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-13 22:18:16,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 235 transitions, 3178 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:16,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:16,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-13 22:18:16,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:16,561 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~q~0_14 v_~M~0_20))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][179], [Black: 190#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 122#(or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 260#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 192#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 123#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 131#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 257#(and (= ~N~0 ~L~0) (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 187#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 127#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 140#(= (+ ~N~0 (* (- 1) ~L~0)) 0), 106#true, Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (= ~N~0 ~L~0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 185#true, Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 67#L99-4true, 7#L83true, 103#true, Black: 211#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0)))), Black: 213#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 207#(and (<= 1 thread2Thread1of1ForFork1_~cond~1) (<= (div thread2Thread1of1ForFork1_~cond~1 256) 0)), 264#true, Black: 215#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0))) (or (< (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 217#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), 120#true, Black: 209#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), 83#L64true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 157#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 159#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 163#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), 6#L46-1true, Black: 150#true, 254#true, Black: 227#(or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 231#(and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 233#(and (= thread2Thread1of1ForFork1_~cond~1 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 175#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 180#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 176#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 240#(or (and (= (* (- 1) thread2Thread1of1ForFork1_~cond~1) 0) (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (and (= (+ (* (- 1) thread2Thread1of1ForFork1_~cond~1) 1) 0) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))))), 238#true, Black: 244#(and (<= (+ 2 (* (div ~N~0 4294967296) 4294967296)) ~N~0) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 242#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 246#(and (= thread1Thread1of1ForFork0_~cond~0 1) (<= (+ 2 (* (div ~N~0 4294967296) 4294967296)) ~N~0) (= thread2Thread1of1ForFork1_~cond~1 1))]) [2022-07-13 22:18:16,561 INFO L384 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-07-13 22:18:16,561 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-13 22:18:16,561 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-13 22:18:16,561 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-07-13 22:18:16,880 INFO L129 PetriNetUnfolder]: 1860/4309 cut-off events. [2022-07-13 22:18:16,880 INFO L130 PetriNetUnfolder]: For 24798/25309 co-relation queries the response was YES. [2022-07-13 22:18:16,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19625 conditions, 4309 events. 1860/4309 cut-off events. For 24798/25309 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36049 event pairs, 229 based on Foata normal form. 143/4307 useless extension candidates. Maximal degree in co-relation 19581. Up to 1429 conditions per place. [2022-07-13 22:18:16,930 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 95 selfloop transitions, 131 changer transitions 3/298 dead transitions. [2022-07-13 22:18:16,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 298 transitions, 4405 flow [2022-07-13 22:18:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:18:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:18:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2022-07-13 22:18:16,932 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8536082474226804 [2022-07-13 22:18:16,933 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2022-07-13 22:18:16,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2022-07-13 22:18:16,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:16,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2022-07-13 22:18:16,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:16,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 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) [2022-07-13 22:18:16,936 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 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) [2022-07-13 22:18:16,936 INFO L186 Difference]: Start difference. First operand has 160 places, 235 transitions, 3178 flow. Second operand 5 states and 414 transitions. [2022-07-13 22:18:16,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 298 transitions, 4405 flow [2022-07-13 22:18:17,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 298 transitions, 4325 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-13 22:18:17,029 INFO L242 Difference]: Finished difference. Result has 166 places, 266 transitions, 4115 flow [2022-07-13 22:18:17,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4115, PETRI_PLACES=166, PETRI_TRANSITIONS=266} [2022-07-13 22:18:17,031 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 80 predicate places. [2022-07-13 22:18:17,032 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 266 transitions, 4115 flow [2022-07-13 22:18:17,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:17,032 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:17,032 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] [2022-07-13 22:18:17,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 22:18:17,033 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash -346743856, now seen corresponding path program 4 times [2022-07-13 22:18:17,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:17,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759575892] [2022-07-13 22:18:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:17,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:17,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:17,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759575892] [2022-07-13 22:18:17,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759575892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:17,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:17,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:18:17,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219032857] [2022-07-13 22:18:17,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:17,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:18:17,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:17,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:18:17,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:18:17,168 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-13 22:18:17,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 266 transitions, 4115 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:17,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:17,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-13 22:18:17,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:18,040 INFO L129 PetriNetUnfolder]: 1950/4789 cut-off events. [2022-07-13 22:18:18,040 INFO L130 PetriNetUnfolder]: For 35999/36593 co-relation queries the response was YES. [2022-07-13 22:18:18,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22906 conditions, 4789 events. 1950/4789 cut-off events. For 35999/36593 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 42268 event pairs, 237 based on Foata normal form. 151/4795 useless extension candidates. Maximal degree in co-relation 22859. Up to 1635 conditions per place. [2022-07-13 22:18:18,116 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 84 selfloop transitions, 167 changer transitions 9/329 dead transitions. [2022-07-13 22:18:18,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 329 transitions, 5409 flow [2022-07-13 22:18:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 495 transitions. [2022-07-13 22:18:18,119 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8505154639175257 [2022-07-13 22:18:18,119 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 495 transitions. [2022-07-13 22:18:18,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 495 transitions. [2022-07-13 22:18:18,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:18,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 495 transitions. [2022-07-13 22:18:18,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.5) internal successors, (495), 6 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:18,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:18,122 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:18,122 INFO L186 Difference]: Start difference. First operand has 166 places, 266 transitions, 4115 flow. Second operand 6 states and 495 transitions. [2022-07-13 22:18:18,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 329 transitions, 5409 flow [2022-07-13 22:18:18,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 329 transitions, 5381 flow, removed 14 selfloop flow, removed 0 redundant places. [2022-07-13 22:18:18,280 INFO L242 Difference]: Finished difference. Result has 174 places, 286 transitions, 4936 flow [2022-07-13 22:18:18,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4936, PETRI_PLACES=174, PETRI_TRANSITIONS=286} [2022-07-13 22:18:18,281 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2022-07-13 22:18:18,281 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 286 transitions, 4936 flow [2022-07-13 22:18:18,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:18,282 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:18,282 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] [2022-07-13 22:18:18,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 22:18:18,282 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:18,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1395758734, now seen corresponding path program 5 times [2022-07-13 22:18:18,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:18,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258729603] [2022-07-13 22:18:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:18,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:18,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:18,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258729603] [2022-07-13 22:18:18,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258729603] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:18,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682273762] [2022-07-13 22:18:18,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:18:18,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:18,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:18,415 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) [2022-07-13 22:18:18,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:18:18,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:18:18,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:18,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:18:18,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:18,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:19,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682273762] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:19,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:18:19,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-07-13 22:18:19,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638689876] [2022-07-13 22:18:19,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:19,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:18:19,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:19,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:18:19,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:18:19,092 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-13 22:18:19,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 286 transitions, 4936 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:19,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:19,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-13 22:18:19,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:20,421 INFO L129 PetriNetUnfolder]: 3895/9307 cut-off events. [2022-07-13 22:18:20,421 INFO L130 PetriNetUnfolder]: For 81067/81102 co-relation queries the response was YES. [2022-07-13 22:18:20,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46008 conditions, 9307 events. 3895/9307 cut-off events. For 81067/81102 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 89826 event pairs, 453 based on Foata normal form. 34/9161 useless extension candidates. Maximal degree in co-relation 45957. Up to 1710 conditions per place. [2022-07-13 22:18:20,537 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 388 selfloop transitions, 167 changer transitions 4/614 dead transitions. [2022-07-13 22:18:20,537 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 614 transitions, 11347 flow [2022-07-13 22:18:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:18:20,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:18:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2022-07-13 22:18:20,539 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8438880706921944 [2022-07-13 22:18:20,539 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2022-07-13 22:18:20,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2022-07-13 22:18:20,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:20,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2022-07-13 22:18:20,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:20,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:20,543 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:20,543 INFO L186 Difference]: Start difference. First operand has 174 places, 286 transitions, 4936 flow. Second operand 7 states and 573 transitions. [2022-07-13 22:18:20,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 614 transitions, 11347 flow [2022-07-13 22:18:21,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 614 transitions, 11207 flow, removed 70 selfloop flow, removed 0 redundant places. [2022-07-13 22:18:21,018 INFO L242 Difference]: Finished difference. Result has 185 places, 413 transitions, 7730 flow [2022-07-13 22:18:21,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7730, PETRI_PLACES=185, PETRI_TRANSITIONS=413} [2022-07-13 22:18:21,019 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 99 predicate places. [2022-07-13 22:18:21,019 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 413 transitions, 7730 flow [2022-07-13 22:18:21,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:21,019 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:21,019 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] [2022-07-13 22:18:21,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 22:18:21,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 22:18:21,220 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:21,221 INFO L85 PathProgramCache]: Analyzing trace with hash 559220224, now seen corresponding path program 6 times [2022-07-13 22:18:21,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:21,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732915844] [2022-07-13 22:18:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:21,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:21,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:21,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732915844] [2022-07-13 22:18:21,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732915844] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:21,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469534963] [2022-07-13 22:18:21,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:18:21,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:21,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:21,487 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) [2022-07-13 22:18:21,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:18:21,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-13 22:18:21,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:21,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:18:21,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:21,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:21,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469534963] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:21,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:18:21,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-07-13 22:18:21,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603204650] [2022-07-13 22:18:21,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:21,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:18:21,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:21,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:18:21,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:18:21,934 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-13 22:18:21,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 413 transitions, 7730 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:21,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:21,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-13 22:18:21,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:23,518 INFO L129 PetriNetUnfolder]: 4074/9522 cut-off events. [2022-07-13 22:18:23,518 INFO L130 PetriNetUnfolder]: For 106901/106901 co-relation queries the response was YES. [2022-07-13 22:18:23,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54464 conditions, 9522 events. 4074/9522 cut-off events. For 106901/106901 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 91322 event pairs, 499 based on Foata normal form. 6/9409 useless extension candidates. Maximal degree in co-relation 54408. Up to 2947 conditions per place. [2022-07-13 22:18:23,629 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 296 selfloop transitions, 219 changer transitions 4/574 dead transitions. [2022-07-13 22:18:23,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 574 transitions, 11140 flow [2022-07-13 22:18:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:18:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:18:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2022-07-13 22:18:23,631 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8394698085419735 [2022-07-13 22:18:23,632 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2022-07-13 22:18:23,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2022-07-13 22:18:23,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:23,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2022-07-13 22:18:23,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:23,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:23,635 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:23,635 INFO L186 Difference]: Start difference. First operand has 185 places, 413 transitions, 7730 flow. Second operand 7 states and 570 transitions. [2022-07-13 22:18:23,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 574 transitions, 11140 flow [2022-07-13 22:18:24,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 574 transitions, 11033 flow, removed 47 selfloop flow, removed 1 redundant places. [2022-07-13 22:18:24,137 INFO L242 Difference]: Finished difference. Result has 196 places, 449 transitions, 9123 flow [2022-07-13 22:18:24,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7637, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9123, PETRI_PLACES=196, PETRI_TRANSITIONS=449} [2022-07-13 22:18:24,138 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 110 predicate places. [2022-07-13 22:18:24,139 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 449 transitions, 9123 flow [2022-07-13 22:18:24,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:24,139 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:24,139 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] [2022-07-13 22:18:24,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:24,340 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,SelfDestructingSolverStorable14 [2022-07-13 22:18:24,340 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:24,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:24,341 INFO L85 PathProgramCache]: Analyzing trace with hash 656605838, now seen corresponding path program 7 times [2022-07-13 22:18:24,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:24,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609457643] [2022-07-13 22:18:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:24,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:24,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:24,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609457643] [2022-07-13 22:18:24,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609457643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:24,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:24,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:18:24,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333940360] [2022-07-13 22:18:24,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:24,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:18:24,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:24,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:18:24,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:18:24,448 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-13 22:18:24,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 449 transitions, 9123 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:24,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:24,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-13 22:18:24,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:26,125 INFO L129 PetriNetUnfolder]: 3464/8894 cut-off events. [2022-07-13 22:18:26,125 INFO L130 PetriNetUnfolder]: For 135480/136714 co-relation queries the response was YES. [2022-07-13 22:18:26,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55488 conditions, 8894 events. 3464/8894 cut-off events. For 135480/136714 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 89611 event pairs, 465 based on Foata normal form. 311/8947 useless extension candidates. Maximal degree in co-relation 55427. Up to 1740 conditions per place. [2022-07-13 22:18:26,219 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 150 selfloop transitions, 370 changer transitions 3/609 dead transitions. [2022-07-13 22:18:26,220 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 609 transitions, 13216 flow [2022-07-13 22:18:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 502 transitions. [2022-07-13 22:18:26,222 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8625429553264605 [2022-07-13 22:18:26,222 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 502 transitions. [2022-07-13 22:18:26,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 502 transitions. [2022-07-13 22:18:26,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:26,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 502 transitions. [2022-07-13 22:18:26,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:26,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:26,227 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:26,227 INFO L186 Difference]: Start difference. First operand has 196 places, 449 transitions, 9123 flow. Second operand 6 states and 502 transitions. [2022-07-13 22:18:26,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 609 transitions, 13216 flow [2022-07-13 22:18:26,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 609 transitions, 13148 flow, removed 34 selfloop flow, removed 0 redundant places. [2022-07-13 22:18:26,538 INFO L242 Difference]: Finished difference. Result has 205 places, 548 transitions, 12794 flow [2022-07-13 22:18:26,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9059, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12794, PETRI_PLACES=205, PETRI_TRANSITIONS=548} [2022-07-13 22:18:26,539 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 119 predicate places. [2022-07-13 22:18:26,539 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 548 transitions, 12794 flow [2022-07-13 22:18:26,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:26,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:26,540 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] [2022-07-13 22:18:26,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 22:18:26,540 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:26,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1072745922, now seen corresponding path program 4 times [2022-07-13 22:18:26,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:26,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460071715] [2022-07-13 22:18:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:26,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:26,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:26,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460071715] [2022-07-13 22:18:26,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460071715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:26,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:26,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:18:26,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273309052] [2022-07-13 22:18:26,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:26,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:18:26,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:26,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:18:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:18:26,609 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-13 22:18:26,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 548 transitions, 12794 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:26,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:26,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-13 22:18:26,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:28,540 INFO L129 PetriNetUnfolder]: 3909/9528 cut-off events. [2022-07-13 22:18:28,541 INFO L130 PetriNetUnfolder]: For 170244/170512 co-relation queries the response was YES. [2022-07-13 22:18:28,602 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63320 conditions, 9528 events. 3909/9528 cut-off events. For 170244/170512 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 93113 event pairs, 976 based on Foata normal form. 37/9292 useless extension candidates. Maximal degree in co-relation 63254. Up to 5688 conditions per place. [2022-07-13 22:18:28,756 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 436 selfloop transitions, 66 changer transitions 8/584 dead transitions. [2022-07-13 22:18:28,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 584 transitions, 14251 flow [2022-07-13 22:18:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-07-13 22:18:28,758 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-07-13 22:18:28,758 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-07-13 22:18:28,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-07-13 22:18:28,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:28,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-07-13 22:18:28,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:28,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:28,761 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:28,761 INFO L186 Difference]: Start difference. First operand has 205 places, 548 transitions, 12794 flow. Second operand 6 states and 476 transitions. [2022-07-13 22:18:28,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 584 transitions, 14251 flow [2022-07-13 22:18:29,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 584 transitions, 14215 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-07-13 22:18:29,160 INFO L242 Difference]: Finished difference. Result has 212 places, 541 transitions, 12699 flow [2022-07-13 22:18:29,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=12418, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12699, PETRI_PLACES=212, PETRI_TRANSITIONS=541} [2022-07-13 22:18:29,161 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 126 predicate places. [2022-07-13 22:18:29,161 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 541 transitions, 12699 flow [2022-07-13 22:18:29,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:29,161 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:29,162 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] [2022-07-13 22:18:29,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 22:18:29,162 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:29,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1416644298, now seen corresponding path program 8 times [2022-07-13 22:18:29,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:29,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131701985] [2022-07-13 22:18:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:29,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:29,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131701985] [2022-07-13 22:18:29,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131701985] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429529039] [2022-07-13 22:18:29,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:18:29,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:29,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:29,264 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) [2022-07-13 22:18:29,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:18:29,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:18:29,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:29,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 22:18:29,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:29,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:30,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429529039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:30,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:30,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-07-13 22:18:30,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225929954] [2022-07-13 22:18:30,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:30,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:18:30,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:30,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:18:30,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:18:30,144 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-13 22:18:30,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 541 transitions, 12699 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:30,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:30,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-13 22:18:30,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:34,487 INFO L129 PetriNetUnfolder]: 7811/19000 cut-off events. [2022-07-13 22:18:34,487 INFO L130 PetriNetUnfolder]: For 303313/304046 co-relation queries the response was YES. [2022-07-13 22:18:34,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118832 conditions, 19000 events. 7811/19000 cut-off events. For 303313/304046 co-relation queries the response was YES. Maximal size of possible extension queue 1439. Compared 210815 event pairs, 1006 based on Foata normal form. 473/19077 useless extension candidates. Maximal degree in co-relation 118762. Up to 4772 conditions per place. [2022-07-13 22:18:34,714 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 783 selfloop transitions, 280 changer transitions 21/1170 dead transitions. [2022-07-13 22:18:34,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1170 transitions, 28289 flow [2022-07-13 22:18:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 22:18:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-13 22:18:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1097 transitions. [2022-07-13 22:18:34,717 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7539518900343642 [2022-07-13 22:18:34,717 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1097 transitions. [2022-07-13 22:18:34,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1097 transitions. [2022-07-13 22:18:34,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:34,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1097 transitions. [2022-07-13 22:18:34,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.13333333333334) internal successors, (1097), 15 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:34,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:34,721 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:34,721 INFO L186 Difference]: Start difference. First operand has 212 places, 541 transitions, 12699 flow. Second operand 15 states and 1097 transitions. [2022-07-13 22:18:34,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1170 transitions, 28289 flow [2022-07-13 22:18:35,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1170 transitions, 28213 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-13 22:18:35,723 INFO L242 Difference]: Finished difference. Result has 236 places, 711 transitions, 17313 flow [2022-07-13 22:18:35,723 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=12577, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=17313, PETRI_PLACES=236, PETRI_TRANSITIONS=711} [2022-07-13 22:18:35,724 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 150 predicate places. [2022-07-13 22:18:35,724 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 711 transitions, 17313 flow [2022-07-13 22:18:35,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:35,724 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:35,724 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] [2022-07-13 22:18:35,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:35,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 22:18:35,925 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:35,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:35,926 INFO L85 PathProgramCache]: Analyzing trace with hash 846898254, now seen corresponding path program 9 times [2022-07-13 22:18:35,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:35,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073586127] [2022-07-13 22:18:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:35,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:36,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:36,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073586127] [2022-07-13 22:18:36,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073586127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:36,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:36,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:18:36,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142347860] [2022-07-13 22:18:36,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:36,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:18:36,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:36,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:18:36,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:18:36,008 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-13 22:18:36,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 711 transitions, 17313 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:36,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:36,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-13 22:18:36,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:40,521 INFO L129 PetriNetUnfolder]: 7695/18660 cut-off events. [2022-07-13 22:18:40,522 INFO L130 PetriNetUnfolder]: For 363847/364686 co-relation queries the response was YES. [2022-07-13 22:18:40,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129115 conditions, 18660 events. 7695/18660 cut-off events. For 363847/364686 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 206916 event pairs, 2046 based on Foata normal form. 194/18371 useless extension candidates. Maximal degree in co-relation 129034. Up to 11820 conditions per place. [2022-07-13 22:18:40,781 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 566 selfloop transitions, 73 changer transitions 9/740 dead transitions. [2022-07-13 22:18:40,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 740 transitions, 18968 flow [2022-07-13 22:18:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 475 transitions. [2022-07-13 22:18:40,783 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8161512027491409 [2022-07-13 22:18:40,783 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 475 transitions. [2022-07-13 22:18:40,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 475 transitions. [2022-07-13 22:18:40,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:40,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 475 transitions. [2022-07-13 22:18:40,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.16666666666667) internal successors, (475), 6 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:40,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:40,786 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:40,786 INFO L186 Difference]: Start difference. First operand has 236 places, 711 transitions, 17313 flow. Second operand 6 states and 475 transitions. [2022-07-13 22:18:40,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 740 transitions, 18968 flow [2022-07-13 22:18:42,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 740 transitions, 18783 flow, removed 58 selfloop flow, removed 4 redundant places. [2022-07-13 22:18:42,058 INFO L242 Difference]: Finished difference. Result has 237 places, 715 transitions, 17401 flow [2022-07-13 22:18:42,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=17100, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17401, PETRI_PLACES=237, PETRI_TRANSITIONS=715} [2022-07-13 22:18:42,059 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 151 predicate places. [2022-07-13 22:18:42,059 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 715 transitions, 17401 flow [2022-07-13 22:18:42,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:42,060 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:42,060 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] [2022-07-13 22:18:42,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 22:18:42,060 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash 570332790, now seen corresponding path program 10 times [2022-07-13 22:18:42,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:42,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254157397] [2022-07-13 22:18:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:42,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:42,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:42,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254157397] [2022-07-13 22:18:42,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254157397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:42,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:42,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:18:42,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948109773] [2022-07-13 22:18:42,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:42,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:18:42,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:42,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:18:42,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:18:42,157 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-13 22:18:42,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 715 transitions, 17401 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:42,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:42,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-13 22:18:42,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:46,578 INFO L129 PetriNetUnfolder]: 7839/18997 cut-off events. [2022-07-13 22:18:46,579 INFO L130 PetriNetUnfolder]: For 377260/378069 co-relation queries the response was YES. [2022-07-13 22:18:46,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132423 conditions, 18997 events. 7839/18997 cut-off events. For 377260/378069 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 211246 event pairs, 2077 based on Foata normal form. 194/18715 useless extension candidates. Maximal degree in co-relation 132341. Up to 11793 conditions per place. [2022-07-13 22:18:47,138 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 627 selfloop transitions, 87 changer transitions 15/819 dead transitions. [2022-07-13 22:18:47,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 819 transitions, 21055 flow [2022-07-13 22:18:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-07-13 22:18:47,140 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-13 22:18:47,140 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-07-13 22:18:47,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-07-13 22:18:47,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:47,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-07-13 22:18:47,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:47,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:47,143 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:47,143 INFO L186 Difference]: Start difference. First operand has 237 places, 715 transitions, 17401 flow. Second operand 6 states and 486 transitions. [2022-07-13 22:18:47,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 819 transitions, 21055 flow [2022-07-13 22:18:48,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 819 transitions, 20722 flow, removed 37 selfloop flow, removed 7 redundant places. [2022-07-13 22:18:48,297 INFO L242 Difference]: Finished difference. Result has 236 places, 713 transitions, 17288 flow [2022-07-13 22:18:48,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16673, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17288, PETRI_PLACES=236, PETRI_TRANSITIONS=713} [2022-07-13 22:18:48,298 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 150 predicate places. [2022-07-13 22:18:48,298 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 713 transitions, 17288 flow [2022-07-13 22:18:48,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:48,298 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:48,299 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] [2022-07-13 22:18:48,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 22:18:48,299 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:18:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:48,299 INFO L85 PathProgramCache]: Analyzing trace with hash -742089420, now seen corresponding path program 1 times [2022-07-13 22:18:48,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:48,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126703540] [2022-07-13 22:18:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:48,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:48,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:48,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126703540] [2022-07-13 22:18:48,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126703540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:48,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825412295] [2022-07-13 22:18:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:48,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:48,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:48,491 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) [2022-07-13 22:18:48,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:18:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:48,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:18:48,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:48,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:54,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825412295] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:54,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:54,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-13 22:18:54,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089063794] [2022-07-13 22:18:54,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:54,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:18:54,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:18:54,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=244, Unknown=1, NotChecked=0, Total=306 [2022-07-13 22:18:54,194 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-13 22:18:54,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 713 transitions, 17288 flow. Second operand has 18 states, 18 states have (on average 67.11111111111111) internal successors, (1208), 18 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:54,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:54,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-13 22:18:54,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:58,834 INFO L129 PetriNetUnfolder]: 7817/20820 cut-off events. [2022-07-13 22:18:58,835 INFO L130 PetriNetUnfolder]: For 399604/400727 co-relation queries the response was YES. [2022-07-13 22:18:59,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143283 conditions, 20820 events. 7817/20820 cut-off events. For 399604/400727 co-relation queries the response was YES. Maximal size of possible extension queue 1672. Compared 245470 event pairs, 539 based on Foata normal form. 373/20764 useless extension candidates. Maximal degree in co-relation 143202. Up to 8773 conditions per place. [2022-07-13 22:18:59,307 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 670 selfloop transitions, 347 changer transitions 9/1133 dead transitions. [2022-07-13 22:18:59,307 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 1133 transitions, 28929 flow [2022-07-13 22:18:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 22:18:59,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 22:18:59,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 855 transitions. [2022-07-13 22:18:59,309 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7345360824742269 [2022-07-13 22:18:59,309 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 855 transitions. [2022-07-13 22:18:59,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 855 transitions. [2022-07-13 22:18:59,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:59,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 855 transitions. [2022-07-13 22:18:59,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 71.25) internal successors, (855), 12 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:59,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:59,313 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:59,314 INFO L186 Difference]: Start difference. First operand has 236 places, 713 transitions, 17288 flow. Second operand 12 states and 855 transitions. [2022-07-13 22:18:59,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 1133 transitions, 28929 flow [2022-07-13 22:19:00,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 1133 transitions, 28505 flow, removed 19 selfloop flow, removed 13 redundant places. [2022-07-13 22:19:00,664 INFO L242 Difference]: Finished difference. Result has 237 places, 922 transitions, 22501 flow [2022-07-13 22:19:00,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16872, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=22501, PETRI_PLACES=237, PETRI_TRANSITIONS=922} [2022-07-13 22:19:00,665 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 151 predicate places. [2022-07-13 22:19:00,665 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 922 transitions, 22501 flow [2022-07-13 22:19:00,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.11111111111111) internal successors, (1208), 18 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:00,666 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:00,666 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] [2022-07-13 22:19:00,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:00,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:00,879 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:00,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1271945040, now seen corresponding path program 2 times [2022-07-13 22:19:00,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:00,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910486966] [2022-07-13 22:19:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:00,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:01,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910486966] [2022-07-13 22:19:01,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910486966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:01,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168851834] [2022-07-13 22:19:01,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:19:01,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:01,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:01,057 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) [2022-07-13 22:19:01,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:19:01,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:19:01,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:01,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:19:01,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:01,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:09,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168851834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:09,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:09,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-13 22:19:09,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953800259] [2022-07-13 22:19:09,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:09,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:19:09,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:09,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:19:09,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=230, Unknown=4, NotChecked=0, Total=306 [2022-07-13 22:19:09,394 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-07-13 22:19:09,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 922 transitions, 22501 flow. Second operand has 18 states, 18 states have (on average 65.55555555555556) internal successors, (1180), 18 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:09,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:09,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-07-13 22:19:09,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:15,529 INFO L129 PetriNetUnfolder]: 9603/24643 cut-off events. [2022-07-13 22:19:15,529 INFO L130 PetriNetUnfolder]: For 497725/498201 co-relation queries the response was YES. [2022-07-13 22:19:15,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177330 conditions, 24643 events. 9603/24643 cut-off events. For 497725/498201 co-relation queries the response was YES. Maximal size of possible extension queue 1995. Compared 293341 event pairs, 1542 based on Foata normal form. 54/24147 useless extension candidates. Maximal degree in co-relation 177251. Up to 12861 conditions per place. [2022-07-13 22:19:15,843 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 624 selfloop transitions, 428 changer transitions 7/1131 dead transitions. [2022-07-13 22:19:15,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1131 transitions, 28693 flow [2022-07-13 22:19:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 22:19:15,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 22:19:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 836 transitions. [2022-07-13 22:19:15,845 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.718213058419244 [2022-07-13 22:19:15,845 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 836 transitions. [2022-07-13 22:19:15,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 836 transitions. [2022-07-13 22:19:15,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:15,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 836 transitions. [2022-07-13 22:19:15,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 69.66666666666667) internal successors, (836), 12 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:15,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:15,848 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:15,848 INFO L186 Difference]: Start difference. First operand has 237 places, 922 transitions, 22501 flow. Second operand 12 states and 836 transitions. [2022-07-13 22:19:15,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1131 transitions, 28693 flow [2022-07-13 22:19:17,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1131 transitions, 28276 flow, removed 168 selfloop flow, removed 5 redundant places. [2022-07-13 22:19:17,708 INFO L242 Difference]: Finished difference. Result has 244 places, 984 transitions, 24543 flow [2022-07-13 22:19:17,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=22086, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=24543, PETRI_PLACES=244, PETRI_TRANSITIONS=984} [2022-07-13 22:19:17,709 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 158 predicate places. [2022-07-13 22:19:17,709 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 984 transitions, 24543 flow [2022-07-13 22:19:17,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.55555555555556) internal successors, (1180), 18 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:17,710 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:17,710 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] [2022-07-13 22:19:17,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:17,910 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,SelfDestructingSolverStorable21 [2022-07-13 22:19:17,910 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash 814758276, now seen corresponding path program 3 times [2022-07-13 22:19:17,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:17,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894521648] [2022-07-13 22:19:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:18,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:18,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894521648] [2022-07-13 22:19:18,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894521648] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:18,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693745702] [2022-07-13 22:19:18,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:19:18,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:18,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:18,076 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) [2022-07-13 22:19:18,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:19:18,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:19:18,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:18,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:19:18,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:18,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:19,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693745702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:19,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:19,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-07-13 22:19:19,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829209704] [2022-07-13 22:19:19,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:19,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 22:19:19,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 22:19:19,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-07-13 22:19:19,044 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-07-13 22:19:19,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 984 transitions, 24543 flow. Second operand has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:19,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:19,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-07-13 22:19:19,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:26,210 INFO L129 PetriNetUnfolder]: 10923/27655 cut-off events. [2022-07-13 22:19:26,210 INFO L130 PetriNetUnfolder]: For 602363/602909 co-relation queries the response was YES. [2022-07-13 22:19:26,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207186 conditions, 27655 events. 10923/27655 cut-off events. For 602363/602909 co-relation queries the response was YES. Maximal size of possible extension queue 2322. Compared 332127 event pairs, 1739 based on Foata normal form. 57/27095 useless extension candidates. Maximal degree in co-relation 207105. Up to 15754 conditions per place. [2022-07-13 22:19:26,827 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 833 selfloop transitions, 409 changer transitions 4/1318 dead transitions. [2022-07-13 22:19:26,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1318 transitions, 35350 flow [2022-07-13 22:19:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 22:19:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 22:19:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 829 transitions. [2022-07-13 22:19:26,829 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7121993127147767 [2022-07-13 22:19:26,829 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 829 transitions. [2022-07-13 22:19:26,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 829 transitions. [2022-07-13 22:19:26,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:26,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 829 transitions. [2022-07-13 22:19:26,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 69.08333333333333) internal successors, (829), 12 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,833 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,833 INFO L186 Difference]: Start difference. First operand has 244 places, 984 transitions, 24543 flow. Second operand 12 states and 829 transitions. [2022-07-13 22:19:26,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1318 transitions, 35350 flow [2022-07-13 22:19:29,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 1318 transitions, 34088 flow, removed 71 selfloop flow, removed 14 redundant places. [2022-07-13 22:19:29,472 INFO L242 Difference]: Finished difference. Result has 241 places, 1152 transitions, 29390 flow [2022-07-13 22:19:29,473 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=23495, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=29390, PETRI_PLACES=241, PETRI_TRANSITIONS=1152} [2022-07-13 22:19:29,474 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 155 predicate places. [2022-07-13 22:19:29,474 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 1152 transitions, 29390 flow [2022-07-13 22:19:29,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:29,475 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:29,475 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] [2022-07-13 22:19:29,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:29,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:29,691 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1637704500, now seen corresponding path program 1 times [2022-07-13 22:19:29,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:29,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652534856] [2022-07-13 22:19:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:29,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:29,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:29,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652534856] [2022-07-13 22:19:29,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652534856] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:29,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041609813] [2022-07-13 22:19:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:29,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:29,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:29,783 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) [2022-07-13 22:19:29,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:19:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:29,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 22:19:29,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:29,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:30,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041609813] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:30,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:30,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 11] total 17 [2022-07-13 22:19:30,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671976751] [2022-07-13 22:19:30,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:30,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 22:19:30,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 22:19:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-07-13 22:19:30,395 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-13 22:19:30,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 1152 transitions, 29390 flow. Second operand has 17 states, 17 states have (on average 71.23529411764706) internal successors, (1211), 17 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:30,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:30,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-13 22:19:30,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand