./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-send-receive-alt.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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:14:27,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:14:27,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:14:27,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:14:27,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:14:27,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:14:27,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:14:27,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:14:27,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:14:27,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:14:27,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:14:27,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:14:27,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:14:27,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:14:27,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:14:27,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:14:27,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:14:27,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:14:27,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:14:27,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:14:27,718 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:14:27,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:14:27,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:14:27,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:14:27,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:14:27,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:14:27,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:14:27,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:14:27,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:14:27,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:14:27,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:14:27,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:14:27,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:14:27,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:14:27,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:14:27,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:14:27,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:14:27,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:14:27,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:14:27,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:14:27,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:14:27,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:14:27,748 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:14:27,773 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:14:27,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:14:27,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:14:27,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:14:27,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:14:27,774 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:14:27,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:14:27,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:14:27,775 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:14:27,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:14:27,776 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:14:27,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:14:27,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:14:27,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:14:27,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:14:27,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:14:27,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:14:27,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:14:27,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:14:27,777 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:14:27,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:14:27,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:14:27,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:14:27,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:14:27,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:14:27,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:14:27,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:14:27,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:14:27,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:14:27,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:14:27,779 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:14:27,779 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:14:27,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:14:27,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2022-07-21 09:14:28,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:14:28,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:14:28,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:14:28,064 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:14:28,064 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:14:28,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-07-21 09:14:28,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb8bd10e2/0353c2b701874f1bb57d357ec05b3a66/FLAG5f73f1ae3 [2022-07-21 09:14:28,512 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:14:28,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-07-21 09:14:28,518 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb8bd10e2/0353c2b701874f1bb57d357ec05b3a66/FLAG5f73f1ae3 [2022-07-21 09:14:28,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb8bd10e2/0353c2b701874f1bb57d357ec05b3a66 [2022-07-21 09:14:28,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:14:28,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:14:28,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:14:28,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:14:28,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:14:28,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bea288e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28, skipping insertion in model container [2022-07-21 09:14:28,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:14:28,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:14:28,740 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-send-receive-alt.wvr.c[2650,2663] [2022-07-21 09:14:28,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:14:28,757 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:14:28,782 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-send-receive-alt.wvr.c[2650,2663] [2022-07-21 09:14:28,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:14:28,797 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:14:28,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28 WrapperNode [2022-07-21 09:14:28,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:14:28,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:14:28,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:14:28,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:14:28,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,840 INFO L137 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2022-07-21 09:14:28,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:14:28,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:14:28,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:14:28,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:14:28,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:14:28,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:14:28,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:14:28,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:14:28,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28" (1/1) ... [2022-07-21 09:14:28,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:14:28,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:28,943 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) [2022-07-21 09:14:28,959 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 [2022-07-21 09:14:28,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:14:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:14:28,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:14:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:14:28,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:14:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:14:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:14:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:14:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:14:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:14:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:14:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:14:28,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:14:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:14:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:14:28,989 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:14:29,089 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:14:29,090 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:14:29,290 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:14:29,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:14:29,348 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:14:29,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:14:29 BoogieIcfgContainer [2022-07-21 09:14:29,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:14:29,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:14:29,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:14:29,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:14:29,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:14:28" (1/3) ... [2022-07-21 09:14:29,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1faf8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:14:29, skipping insertion in model container [2022-07-21 09:14:29,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:28" (2/3) ... [2022-07-21 09:14:29,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1faf8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:14:29, skipping insertion in model container [2022-07-21 09:14:29,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:14:29" (3/3) ... [2022-07-21 09:14:29,355 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-07-21 09:14:29,358 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:14:29,364 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:14:29,364 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:14:29,365 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:14:29,401 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:14:29,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 129 places, 133 transitions, 282 flow [2022-07-21 09:14:29,504 INFO L129 PetriNetUnfolder]: 11/131 cut-off events. [2022-07-21 09:14:29,504 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:14:29,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 11/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-07-21 09:14:29,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 133 transitions, 282 flow [2022-07-21 09:14:29,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 122 transitions, 256 flow [2022-07-21 09:14:29,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:14:29,523 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@36597b9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@70b447ec [2022-07-21 09:14:29,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:14:29,558 INFO L129 PetriNetUnfolder]: 11/121 cut-off events. [2022-07-21 09:14:29,559 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:14:29,559 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:29,559 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:29,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:29,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2032369785, now seen corresponding path program 1 times [2022-07-21 09:14:29,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:29,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525310313] [2022-07-21 09:14:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:29,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:29,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:29,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525310313] [2022-07-21 09:14:29,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525310313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:29,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:29,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:14:29,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118929297] [2022-07-21 09:14:29,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:29,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:14:29,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:14:29,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:14:29,846 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 133 [2022-07-21 09:14:29,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 256 flow. Second operand has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:29,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:29,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 133 [2022-07-21 09:14:29,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:29,920 INFO L129 PetriNetUnfolder]: 8/122 cut-off events. [2022-07-21 09:14:29,921 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-21 09:14:29,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 8/122 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 1 based on Foata normal form. 10/122 useless extension candidates. Maximal degree in co-relation 83. Up to 13 conditions per place. [2022-07-21 09:14:29,923 INFO L132 encePairwiseOnDemand]: 126/133 looper letters, 7 selfloop transitions, 0 changer transitions 3/115 dead transitions. [2022-07-21 09:14:29,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 256 flow [2022-07-21 09:14:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:14:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:14:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 250 transitions. [2022-07-21 09:14:29,937 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9398496240601504 [2022-07-21 09:14:29,937 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 250 transitions. [2022-07-21 09:14:29,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 250 transitions. [2022-07-21 09:14:29,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:29,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 250 transitions. [2022-07-21 09:14:29,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.0) internal successors, (250), 2 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:29,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:29,946 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:29,948 INFO L186 Difference]: Start difference. First operand has 118 places, 122 transitions, 256 flow. Second operand 2 states and 250 transitions. [2022-07-21 09:14:29,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 256 flow [2022-07-21 09:14:29,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 115 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:14:29,953 INFO L242 Difference]: Finished difference. Result has 115 places, 112 transitions, 228 flow [2022-07-21 09:14:29,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=228, PETRI_PLACES=115, PETRI_TRANSITIONS=112} [2022-07-21 09:14:29,957 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -3 predicate places. [2022-07-21 09:14:29,957 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 112 transitions, 228 flow [2022-07-21 09:14:29,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:29,958 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:29,958 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:29,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:14:29,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:29,959 INFO L85 PathProgramCache]: Analyzing trace with hash 882365775, now seen corresponding path program 1 times [2022-07-21 09:14:29,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:29,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569004282] [2022-07-21 09:14:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:29,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:30,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:30,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569004282] [2022-07-21 09:14:30,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569004282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:30,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:30,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:14:30,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753565038] [2022-07-21 09:14:30,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:30,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:14:30,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:30,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:14:30,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:14:30,115 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 133 [2022-07-21 09:14:30,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:30,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 133 [2022-07-21 09:14:30,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:30,177 INFO L129 PetriNetUnfolder]: 13/157 cut-off events. [2022-07-21 09:14:30,178 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-07-21 09:14:30,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 157 events. 13/157 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 254 event pairs, 1 based on Foata normal form. 2/149 useless extension candidates. Maximal degree in co-relation 199. Up to 19 conditions per place. [2022-07-21 09:14:30,179 INFO L132 encePairwiseOnDemand]: 128/133 looper letters, 23 selfloop transitions, 2 changer transitions 4/121 dead transitions. [2022-07-21 09:14:30,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 307 flow [2022-07-21 09:14:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:14:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:14:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2022-07-21 09:14:30,182 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2022-07-21 09:14:30,182 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2022-07-21 09:14:30,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2022-07-21 09:14:30,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:30,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2022-07-21 09:14:30,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,187 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,187 INFO L186 Difference]: Start difference. First operand has 115 places, 112 transitions, 228 flow. Second operand 5 states and 540 transitions. [2022-07-21 09:14:30,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 307 flow [2022-07-21 09:14:30,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:14:30,190 INFO L242 Difference]: Finished difference. Result has 119 places, 113 transitions, 244 flow [2022-07-21 09:14:30,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2022-07-21 09:14:30,191 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2022-07-21 09:14:30,191 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 244 flow [2022-07-21 09:14:30,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,192 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:30,192 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:30,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:14:30,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:30,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:30,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1024793816, now seen corresponding path program 1 times [2022-07-21 09:14:30,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:30,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919322866] [2022-07-21 09:14:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:30,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:30,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:30,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919322866] [2022-07-21 09:14:30,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919322866] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:30,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:30,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:14:30,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765071637] [2022-07-21 09:14:30,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:30,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:14:30,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:30,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:14:30,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:14:30,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 133 [2022-07-21 09:14:30,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:30,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 133 [2022-07-21 09:14:30,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:30,336 INFO L129 PetriNetUnfolder]: 18/188 cut-off events. [2022-07-21 09:14:30,337 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-21 09:14:30,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 188 events. 18/188 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 361 event pairs, 3 based on Foata normal form. 3/175 useless extension candidates. Maximal degree in co-relation 240. Up to 30 conditions per place. [2022-07-21 09:14:30,338 INFO L132 encePairwiseOnDemand]: 127/133 looper letters, 14 selfloop transitions, 5 changer transitions 2/118 dead transitions. [2022-07-21 09:14:30,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 298 flow [2022-07-21 09:14:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:14:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:14:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2022-07-21 09:14:30,340 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8796992481203008 [2022-07-21 09:14:30,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2022-07-21 09:14:30,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2022-07-21 09:14:30,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:30,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2022-07-21 09:14:30,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,343 INFO L186 Difference]: Start difference. First operand has 119 places, 113 transitions, 244 flow. Second operand 3 states and 351 transitions. [2022-07-21 09:14:30,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 298 flow [2022-07-21 09:14:30,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 292 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-21 09:14:30,345 INFO L242 Difference]: Finished difference. Result has 117 places, 115 transitions, 263 flow [2022-07-21 09:14:30,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=117, PETRI_TRANSITIONS=115} [2022-07-21 09:14:30,346 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2022-07-21 09:14:30,347 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 263 flow [2022-07-21 09:14:30,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,347 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:30,347 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:30,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:14:30,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:30,348 INFO L85 PathProgramCache]: Analyzing trace with hash 315089418, now seen corresponding path program 1 times [2022-07-21 09:14:30,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:30,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980385812] [2022-07-21 09:14:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:30,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:30,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:30,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980385812] [2022-07-21 09:14:30,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980385812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:30,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:30,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:14:30,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520797605] [2022-07-21 09:14:30,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:30,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:14:30,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:14:30,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:14:30,429 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2022-07-21 09:14:30,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 115 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:30,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2022-07-21 09:14:30,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:30,476 INFO L129 PetriNetUnfolder]: 29/229 cut-off events. [2022-07-21 09:14:30,476 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-21 09:14:30,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 229 events. 29/229 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 667 event pairs, 7 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 322. Up to 46 conditions per place. [2022-07-21 09:14:30,479 INFO L132 encePairwiseOnDemand]: 130/133 looper letters, 16 selfloop transitions, 2 changer transitions 1/120 dead transitions. [2022-07-21 09:14:30,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 120 transitions, 316 flow [2022-07-21 09:14:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:14:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:14:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2022-07-21 09:14:30,480 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9022556390977443 [2022-07-21 09:14:30,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2022-07-21 09:14:30,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2022-07-21 09:14:30,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:30,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2022-07-21 09:14:30,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,485 INFO L186 Difference]: Start difference. First operand has 117 places, 115 transitions, 263 flow. Second operand 3 states and 360 transitions. [2022-07-21 09:14:30,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 120 transitions, 316 flow [2022-07-21 09:14:30,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 120 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:14:30,491 INFO L242 Difference]: Finished difference. Result has 119 places, 115 transitions, 266 flow [2022-07-21 09:14:30,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=119, PETRI_TRANSITIONS=115} [2022-07-21 09:14:30,492 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2022-07-21 09:14:30,496 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 115 transitions, 266 flow [2022-07-21 09:14:30,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,497 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:30,497 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:30,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:14:30,497 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash 660397636, now seen corresponding path program 1 times [2022-07-21 09:14:30,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:30,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736073296] [2022-07-21 09:14:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:30,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:30,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736073296] [2022-07-21 09:14:30,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736073296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:30,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:30,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:14:30,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193381724] [2022-07-21 09:14:30,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:30,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:14:30,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:14:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:14:30,627 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 133 [2022-07-21 09:14:30,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 115 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:30,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 133 [2022-07-21 09:14:30,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:30,761 INFO L129 PetriNetUnfolder]: 25/291 cut-off events. [2022-07-21 09:14:30,761 INFO L130 PetriNetUnfolder]: For 51/55 co-relation queries the response was YES. [2022-07-21 09:14:30,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 291 events. 25/291 cut-off events. For 51/55 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 957 event pairs, 9 based on Foata normal form. 3/274 useless extension candidates. Maximal degree in co-relation 416. Up to 28 conditions per place. [2022-07-21 09:14:30,763 INFO L132 encePairwiseOnDemand]: 122/133 looper letters, 24 selfloop transitions, 9 changer transitions 11/131 dead transitions. [2022-07-21 09:14:30,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 131 transitions, 398 flow [2022-07-21 09:14:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:14:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:14:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 934 transitions. [2022-07-21 09:14:30,765 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7802840434419381 [2022-07-21 09:14:30,765 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 934 transitions. [2022-07-21 09:14:30,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 934 transitions. [2022-07-21 09:14:30,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:30,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 934 transitions. [2022-07-21 09:14:30,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 133.0) internal successors, (1330), 10 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,770 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 133.0) internal successors, (1330), 10 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,770 INFO L186 Difference]: Start difference. First operand has 119 places, 115 transitions, 266 flow. Second operand 9 states and 934 transitions. [2022-07-21 09:14:30,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 131 transitions, 398 flow [2022-07-21 09:14:30,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 131 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:14:30,773 INFO L242 Difference]: Finished difference. Result has 128 places, 116 transitions, 292 flow [2022-07-21 09:14:30,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=292, PETRI_PLACES=128, PETRI_TRANSITIONS=116} [2022-07-21 09:14:30,774 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 10 predicate places. [2022-07-21 09:14:30,775 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 116 transitions, 292 flow [2022-07-21 09:14:30,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,776 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:30,776 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:30,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:14:30,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:30,779 INFO L85 PathProgramCache]: Analyzing trace with hash 787603777, now seen corresponding path program 1 times [2022-07-21 09:14:30,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:30,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355364686] [2022-07-21 09:14:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:30,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:14:31,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:31,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355364686] [2022-07-21 09:14:31,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355364686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300332153] [2022-07-21 09:14:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:31,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:31,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:31,011 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) [2022-07-21 09:14:31,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:14:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:31,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 09:14:31,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:31,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:14:31,586 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:14:31,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:14:31,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 09:14:32,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:14:32,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:14:32,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-21 09:14:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:32,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:33,158 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:33,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 72 [2022-07-21 09:14:33,168 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:33,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 494 treesize of output 462 [2022-07-21 09:14:33,179 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:33,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 446 treesize of output 390 [2022-07-21 09:14:33,192 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:33,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 374 treesize of output 354 [2022-07-21 09:14:34,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:14:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:34,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300332153] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:34,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:34,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 27, 25] total 51 [2022-07-21 09:14:34,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581954444] [2022-07-21 09:14:34,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:34,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 09:14:34,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:34,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 09:14:34,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=1882, Unknown=56, NotChecked=0, Total=2550 [2022-07-21 09:14:34,286 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 133 [2022-07-21 09:14:34,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 116 transitions, 292 flow. Second operand has 51 states, 51 states have (on average 61.78431372549019) internal successors, (3151), 51 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:34,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:34,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 133 [2022-07-21 09:14:34,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:35,257 INFO L129 PetriNetUnfolder]: 128/750 cut-off events. [2022-07-21 09:14:35,257 INFO L130 PetriNetUnfolder]: For 193/209 co-relation queries the response was YES. [2022-07-21 09:14:35,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 750 events. 128/750 cut-off events. For 193/209 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4510 event pairs, 6 based on Foata normal form. 2/694 useless extension candidates. Maximal degree in co-relation 1247. Up to 78 conditions per place. [2022-07-21 09:14:35,261 INFO L132 encePairwiseOnDemand]: 102/133 looper letters, 89 selfloop transitions, 39 changer transitions 20/202 dead transitions. [2022-07-21 09:14:35,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 202 transitions, 832 flow [2022-07-21 09:14:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:14:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:14:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2333 transitions. [2022-07-21 09:14:35,266 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4740906319853688 [2022-07-21 09:14:35,266 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2333 transitions. [2022-07-21 09:14:35,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2333 transitions. [2022-07-21 09:14:35,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:35,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2333 transitions. [2022-07-21 09:14:35,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 63.054054054054056) internal successors, (2333), 37 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 133.0) internal successors, (5054), 38 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,278 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 133.0) internal successors, (5054), 38 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,278 INFO L186 Difference]: Start difference. First operand has 128 places, 116 transitions, 292 flow. Second operand 37 states and 2333 transitions. [2022-07-21 09:14:35,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 202 transitions, 832 flow [2022-07-21 09:14:35,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 202 transitions, 812 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-07-21 09:14:35,282 INFO L242 Difference]: Finished difference. Result has 171 places, 136 transitions, 495 flow [2022-07-21 09:14:35,283 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=495, PETRI_PLACES=171, PETRI_TRANSITIONS=136} [2022-07-21 09:14:35,283 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 53 predicate places. [2022-07-21 09:14:35,283 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 136 transitions, 495 flow [2022-07-21 09:14:35,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 61.78431372549019) internal successors, (3151), 51 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,284 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:35,285 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:35,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:35,499 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,SelfDestructingSolverStorable5 [2022-07-21 09:14:35,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:35,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:35,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1743264357, now seen corresponding path program 2 times [2022-07-21 09:14:35,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:35,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891311776] [2022-07-21 09:14:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:35,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:14:35,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:35,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891311776] [2022-07-21 09:14:35,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891311776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:35,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:35,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:14:35,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643496874] [2022-07-21 09:14:35,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:35,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:14:35,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:35,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:14:35,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:14:35,547 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 133 [2022-07-21 09:14:35,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 136 transitions, 495 flow. Second operand has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:35,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 133 [2022-07-21 09:14:35,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:35,643 INFO L129 PetriNetUnfolder]: 98/801 cut-off events. [2022-07-21 09:14:35,643 INFO L130 PetriNetUnfolder]: For 756/804 co-relation queries the response was YES. [2022-07-21 09:14:35,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 801 events. 98/801 cut-off events. For 756/804 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4632 event pairs, 6 based on Foata normal form. 21/762 useless extension candidates. Maximal degree in co-relation 1485. Up to 101 conditions per place. [2022-07-21 09:14:35,647 INFO L132 encePairwiseOnDemand]: 129/133 looper letters, 31 selfloop transitions, 16 changer transitions 0/157 dead transitions. [2022-07-21 09:14:35,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 157 transitions, 724 flow [2022-07-21 09:14:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:14:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:14:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2022-07-21 09:14:35,649 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8947368421052632 [2022-07-21 09:14:35,649 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2022-07-21 09:14:35,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2022-07-21 09:14:35,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:35,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2022-07-21 09:14:35,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 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) [2022-07-21 09:14:35,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,652 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,652 INFO L186 Difference]: Start difference. First operand has 171 places, 136 transitions, 495 flow. Second operand 4 states and 476 transitions. [2022-07-21 09:14:35,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 157 transitions, 724 flow [2022-07-21 09:14:35,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 157 transitions, 646 flow, removed 18 selfloop flow, removed 22 redundant places. [2022-07-21 09:14:35,659 INFO L242 Difference]: Finished difference. Result has 150 places, 149 transitions, 610 flow [2022-07-21 09:14:35,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=610, PETRI_PLACES=150, PETRI_TRANSITIONS=149} [2022-07-21 09:14:35,660 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 32 predicate places. [2022-07-21 09:14:35,660 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 149 transitions, 610 flow [2022-07-21 09:14:35,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:35,661 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:35,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:14:35,661 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:35,662 INFO L85 PathProgramCache]: Analyzing trace with hash 209023655, now seen corresponding path program 3 times [2022-07-21 09:14:35,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:35,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380388113] [2022-07-21 09:14:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:35,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:14:35,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:35,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380388113] [2022-07-21 09:14:35,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380388113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:35,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:35,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:14:35,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073198495] [2022-07-21 09:14:35,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:35,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:14:35,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:35,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:14:35,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:14:35,766 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2022-07-21 09:14:35,766 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 149 transitions, 610 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,766 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:35,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2022-07-21 09:14:35,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:35,935 INFO L129 PetriNetUnfolder]: 172/1415 cut-off events. [2022-07-21 09:14:35,935 INFO L130 PetriNetUnfolder]: For 1367/1380 co-relation queries the response was YES. [2022-07-21 09:14:35,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2620 conditions, 1415 events. 172/1415 cut-off events. For 1367/1380 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 10848 event pairs, 37 based on Foata normal form. 49/1330 useless extension candidates. Maximal degree in co-relation 2599. Up to 193 conditions per place. [2022-07-21 09:14:35,941 INFO L132 encePairwiseOnDemand]: 129/133 looper letters, 46 selfloop transitions, 4 changer transitions 1/163 dead transitions. [2022-07-21 09:14:35,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 163 transitions, 825 flow [2022-07-21 09:14:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:14:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:14:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2022-07-21 09:14:35,943 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8909774436090225 [2022-07-21 09:14:35,943 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2022-07-21 09:14:35,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2022-07-21 09:14:35,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:35,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2022-07-21 09:14:35,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,945 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,946 INFO L186 Difference]: Start difference. First operand has 150 places, 149 transitions, 610 flow. Second operand 4 states and 474 transitions. [2022-07-21 09:14:35,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 163 transitions, 825 flow [2022-07-21 09:14:35,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 163 transitions, 813 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-21 09:14:35,949 INFO L242 Difference]: Finished difference. Result has 155 places, 148 transitions, 606 flow [2022-07-21 09:14:35,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=606, PETRI_PLACES=155, PETRI_TRANSITIONS=148} [2022-07-21 09:14:35,950 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 37 predicate places. [2022-07-21 09:14:35,950 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 148 transitions, 606 flow [2022-07-21 09:14:35,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:35,951 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:35,951 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:35,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:14:35,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:35,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash 4844825, now seen corresponding path program 1 times [2022-07-21 09:14:35,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:35,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136792901] [2022-07-21 09:14:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:35,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:36,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:36,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136792901] [2022-07-21 09:14:36,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136792901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:36,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088924317] [2022-07-21 09:14:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:36,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:36,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:36,102 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) [2022-07-21 09:14:36,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:14:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:36,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 09:14:36,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:36,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:37,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088924317] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:37,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:37,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-07-21 09:14:37,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343757924] [2022-07-21 09:14:37,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:37,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:14:37,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:37,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:14:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:14:37,029 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2022-07-21 09:14:37,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 148 transitions, 606 flow. Second operand has 33 states, 33 states have (on average 96.57575757575758) internal successors, (3187), 33 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:37,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:37,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2022-07-21 09:14:37,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:38,302 INFO L129 PetriNetUnfolder]: 349/2116 cut-off events. [2022-07-21 09:14:38,303 INFO L130 PetriNetUnfolder]: For 2957/2965 co-relation queries the response was YES. [2022-07-21 09:14:38,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4262 conditions, 2116 events. 349/2116 cut-off events. For 2957/2965 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 17892 event pairs, 109 based on Foata normal form. 75/1996 useless extension candidates. Maximal degree in co-relation 4238. Up to 314 conditions per place. [2022-07-21 09:14:38,311 INFO L132 encePairwiseOnDemand]: 114/133 looper letters, 68 selfloop transitions, 43 changer transitions 18/216 dead transitions. [2022-07-21 09:14:38,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 216 transitions, 1206 flow [2022-07-21 09:14:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 09:14:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-21 09:14:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2449 transitions. [2022-07-21 09:14:38,315 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7365413533834586 [2022-07-21 09:14:38,315 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2449 transitions. [2022-07-21 09:14:38,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2449 transitions. [2022-07-21 09:14:38,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:38,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2449 transitions. [2022-07-21 09:14:38,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 97.96) internal successors, (2449), 25 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:38,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 133.0) internal successors, (3458), 26 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:38,325 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 133.0) internal successors, (3458), 26 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:38,325 INFO L186 Difference]: Start difference. First operand has 155 places, 148 transitions, 606 flow. Second operand 25 states and 2449 transitions. [2022-07-21 09:14:38,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 216 transitions, 1206 flow [2022-07-21 09:14:38,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 216 transitions, 1187 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-21 09:14:38,331 INFO L242 Difference]: Finished difference. Result has 189 places, 168 transitions, 926 flow [2022-07-21 09:14:38,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=926, PETRI_PLACES=189, PETRI_TRANSITIONS=168} [2022-07-21 09:14:38,332 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 71 predicate places. [2022-07-21 09:14:38,332 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 168 transitions, 926 flow [2022-07-21 09:14:38,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 96.57575757575758) internal successors, (3187), 33 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:38,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:38,333 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:38,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:38,551 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,SelfDestructingSolverStorable8 [2022-07-21 09:14:38,552 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1831596973, now seen corresponding path program 2 times [2022-07-21 09:14:38,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:38,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581931350] [2022-07-21 09:14:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:38,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:38,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581931350] [2022-07-21 09:14:38,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581931350] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:38,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554051059] [2022-07-21 09:14:38,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:14:38,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:38,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:38,668 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) [2022-07-21 09:14:38,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:14:38,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:14:38,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:38,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 09:14:38,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:39,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:39,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554051059] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:39,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:39,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 29 [2022-07-21 09:14:39,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993974221] [2022-07-21 09:14:39,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:39,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 09:14:39,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:39,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 09:14:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-07-21 09:14:39,431 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2022-07-21 09:14:39,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 168 transitions, 926 flow. Second operand has 29 states, 29 states have (on average 96.79310344827586) internal successors, (2807), 29 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:39,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:39,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2022-07-21 09:14:39,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:40,116 INFO L129 PetriNetUnfolder]: 179/1194 cut-off events. [2022-07-21 09:14:40,116 INFO L130 PetriNetUnfolder]: For 2422/2434 co-relation queries the response was YES. [2022-07-21 09:14:40,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2853 conditions, 1194 events. 179/1194 cut-off events. For 2422/2434 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 8403 event pairs, 87 based on Foata normal form. 8/1129 useless extension candidates. Maximal degree in co-relation 2818. Up to 314 conditions per place. [2022-07-21 09:14:40,123 INFO L132 encePairwiseOnDemand]: 115/133 looper letters, 59 selfloop transitions, 19 changer transitions 25/190 dead transitions. [2022-07-21 09:14:40,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 190 transitions, 1116 flow [2022-07-21 09:14:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:14:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 09:14:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2059 transitions. [2022-07-21 09:14:40,127 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7372001432151808 [2022-07-21 09:14:40,127 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2059 transitions. [2022-07-21 09:14:40,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2059 transitions. [2022-07-21 09:14:40,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:40,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2059 transitions. [2022-07-21 09:14:40,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 98.04761904761905) internal successors, (2059), 21 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:40,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 133.0) internal successors, (2926), 22 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:40,135 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 133.0) internal successors, (2926), 22 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:40,135 INFO L186 Difference]: Start difference. First operand has 189 places, 168 transitions, 926 flow. Second operand 21 states and 2059 transitions. [2022-07-21 09:14:40,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 190 transitions, 1116 flow [2022-07-21 09:14:40,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 190 transitions, 1067 flow, removed 12 selfloop flow, removed 10 redundant places. [2022-07-21 09:14:40,142 INFO L242 Difference]: Finished difference. Result has 199 places, 147 transitions, 690 flow [2022-07-21 09:14:40,143 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=690, PETRI_PLACES=199, PETRI_TRANSITIONS=147} [2022-07-21 09:14:40,143 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 81 predicate places. [2022-07-21 09:14:40,143 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 147 transitions, 690 flow [2022-07-21 09:14:40,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 96.79310344827586) internal successors, (2807), 29 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:40,144 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:40,145 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:40,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:40,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:40,362 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:40,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1401725035, now seen corresponding path program 3 times [2022-07-21 09:14:40,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:40,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540123473] [2022-07-21 09:14:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:40,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:40,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:40,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540123473] [2022-07-21 09:14:40,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540123473] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:40,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454145120] [2022-07-21 09:14:40,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:14:40,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:40,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:40,520 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) [2022-07-21 09:14:40,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:14:40,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:14:40,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:40,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 09:14:40,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:14:40,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:14:40,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454145120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:40,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:40,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-07-21 09:14:40,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133754841] [2022-07-21 09:14:40,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:40,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 09:14:40,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:40,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 09:14:40,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-07-21 09:14:40,965 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2022-07-21 09:14:40,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 147 transitions, 690 flow. Second operand has 26 states, 26 states have (on average 96.84615384615384) internal successors, (2518), 26 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:40,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:40,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2022-07-21 09:14:40,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:41,587 INFO L129 PetriNetUnfolder]: 159/1099 cut-off events. [2022-07-21 09:14:41,587 INFO L130 PetriNetUnfolder]: For 2471/2479 co-relation queries the response was YES. [2022-07-21 09:14:41,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2662 conditions, 1099 events. 159/1099 cut-off events. For 2471/2479 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 7459 event pairs, 99 based on Foata normal form. 2/1033 useless extension candidates. Maximal degree in co-relation 2625. Up to 338 conditions per place. [2022-07-21 09:14:41,594 INFO L132 encePairwiseOnDemand]: 115/133 looper letters, 52 selfloop transitions, 19 changer transitions 8/166 dead transitions. [2022-07-21 09:14:41,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 166 transitions, 922 flow [2022-07-21 09:14:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 09:14:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 09:14:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1756 transitions. [2022-07-21 09:14:41,598 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.733500417710944 [2022-07-21 09:14:41,598 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1756 transitions. [2022-07-21 09:14:41,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1756 transitions. [2022-07-21 09:14:41,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:41,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1756 transitions. [2022-07-21 09:14:41,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 97.55555555555556) internal successors, (1756), 18 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:41,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 133.0) internal successors, (2527), 19 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:41,610 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 133.0) internal successors, (2527), 19 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:41,610 INFO L186 Difference]: Start difference. First operand has 199 places, 147 transitions, 690 flow. Second operand 18 states and 1756 transitions. [2022-07-21 09:14:41,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 166 transitions, 922 flow [2022-07-21 09:14:41,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 166 transitions, 865 flow, removed 9 selfloop flow, removed 17 redundant places. [2022-07-21 09:14:41,618 INFO L242 Difference]: Finished difference. Result has 194 places, 146 transitions, 673 flow [2022-07-21 09:14:41,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=673, PETRI_PLACES=194, PETRI_TRANSITIONS=146} [2022-07-21 09:14:41,619 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 76 predicate places. [2022-07-21 09:14:41,619 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 146 transitions, 673 flow [2022-07-21 09:14:41,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 96.84615384615384) internal successors, (2518), 26 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:41,619 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:41,620 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:41,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:41,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:41,837 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:41,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:41,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1541184629, now seen corresponding path program 4 times [2022-07-21 09:14:41,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:41,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747417303] [2022-07-21 09:14:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:41,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:42,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:42,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747417303] [2022-07-21 09:14:42,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747417303] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:42,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293732250] [2022-07-21 09:14:42,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:14:42,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:42,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:42,012 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) [2022-07-21 09:14:42,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:14:42,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:14:42,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 09:14:42,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:42,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:42,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293732250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:42,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:42,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 31 [2022-07-21 09:14:42,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409928188] [2022-07-21 09:14:42,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:42,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 09:14:42,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:42,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 09:14:42,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-07-21 09:14:42,825 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2022-07-21 09:14:42,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 146 transitions, 673 flow. Second operand has 31 states, 31 states have (on average 96.6774193548387) internal successors, (2997), 31 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:42,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:42,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2022-07-21 09:14:42,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:43,740 INFO L129 PetriNetUnfolder]: 154/1023 cut-off events. [2022-07-21 09:14:43,740 INFO L130 PetriNetUnfolder]: For 2085/2093 co-relation queries the response was YES. [2022-07-21 09:14:43,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 1023 events. 154/1023 cut-off events. For 2085/2093 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 6676 event pairs, 77 based on Foata normal form. 2/962 useless extension candidates. Maximal degree in co-relation 2410. Up to 314 conditions per place. [2022-07-21 09:14:43,746 INFO L132 encePairwiseOnDemand]: 115/133 looper letters, 41 selfloop transitions, 17 changer transitions 29/170 dead transitions. [2022-07-21 09:14:43,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 170 transitions, 919 flow [2022-07-21 09:14:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 09:14:43,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-21 09:14:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2138 transitions. [2022-07-21 09:14:43,748 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7306903622693096 [2022-07-21 09:14:43,749 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2138 transitions. [2022-07-21 09:14:43,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2138 transitions. [2022-07-21 09:14:43,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:43,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2138 transitions. [2022-07-21 09:14:43,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 97.18181818181819) internal successors, (2138), 22 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:43,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 133.0) internal successors, (3059), 23 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:43,754 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 133.0) internal successors, (3059), 23 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:43,754 INFO L186 Difference]: Start difference. First operand has 194 places, 146 transitions, 673 flow. Second operand 22 states and 2138 transitions. [2022-07-21 09:14:43,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 170 transitions, 919 flow [2022-07-21 09:14:43,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 170 transitions, 867 flow, removed 9 selfloop flow, removed 16 redundant places. [2022-07-21 09:14:43,761 INFO L242 Difference]: Finished difference. Result has 196 places, 136 transitions, 594 flow [2022-07-21 09:14:43,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=594, PETRI_PLACES=196, PETRI_TRANSITIONS=136} [2022-07-21 09:14:43,763 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 78 predicate places. [2022-07-21 09:14:43,763 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 136 transitions, 594 flow [2022-07-21 09:14:43,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 96.6774193548387) internal successors, (2997), 31 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:43,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:43,764 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:43,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:43,981 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,SelfDestructingSolverStorable11 [2022-07-21 09:14:43,981 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:43,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:43,982 INFO L85 PathProgramCache]: Analyzing trace with hash -212533129, now seen corresponding path program 5 times [2022-07-21 09:14:43,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:43,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447006308] [2022-07-21 09:14:43,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:43,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:14:44,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:44,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447006308] [2022-07-21 09:14:44,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447006308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:44,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525591200] [2022-07-21 09:14:44,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:14:44,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:44,182 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) [2022-07-21 09:14:44,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:14:44,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:14:44,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:44,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-21 09:14:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:44,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:14:44,480 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:14:44,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:14:44,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 09:14:44,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:14:44,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:14:45,362 INFO L356 Elim1Store]: treesize reduction 96, result has 6.8 percent of original size [2022-07-21 09:14:45,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2022-07-21 09:14:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:45,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:46,900 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:46,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 125 [2022-07-21 09:14:46,928 INFO L356 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2022-07-21 09:14:46,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 384 treesize of output 371 [2022-07-21 09:14:46,956 INFO L356 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2022-07-21 09:14:46,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 333 treesize of output 293 [2022-07-21 09:14:46,983 INFO L356 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2022-07-21 09:14:46,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 255 treesize of output 254 [2022-07-21 09:14:48,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:14:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:48,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525591200] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:48,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:48,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 29, 28] total 58 [2022-07-21 09:14:48,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627922299] [2022-07-21 09:14:48,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:48,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 09:14:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 09:14:48,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=2792, Unknown=46, NotChecked=0, Total=3306 [2022-07-21 09:14:48,657 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2022-07-21 09:14:48,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 136 transitions, 594 flow. Second operand has 58 states, 58 states have (on average 58.08620689655172) internal successors, (3369), 58 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:48,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:48,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2022-07-21 09:14:48,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:54,388 INFO L129 PetriNetUnfolder]: 1478/5629 cut-off events. [2022-07-21 09:14:54,388 INFO L130 PetriNetUnfolder]: For 20412/20465 co-relation queries the response was YES. [2022-07-21 09:14:54,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16842 conditions, 5629 events. 1478/5629 cut-off events. For 20412/20465 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 54341 event pairs, 128 based on Foata normal form. 35/5361 useless extension candidates. Maximal degree in co-relation 16804. Up to 635 conditions per place. [2022-07-21 09:14:54,427 INFO L132 encePairwiseOnDemand]: 102/133 looper letters, 315 selfloop transitions, 156 changer transitions 119/641 dead transitions. [2022-07-21 09:14:54,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 641 transitions, 4912 flow [2022-07-21 09:14:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-21 09:14:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-07-21 09:14:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 5413 transitions. [2022-07-21 09:14:54,433 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.46249145591250856 [2022-07-21 09:14:54,433 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 5413 transitions. [2022-07-21 09:14:54,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 5413 transitions. [2022-07-21 09:14:54,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:54,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 5413 transitions. [2022-07-21 09:14:54,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 61.51136363636363) internal successors, (5413), 88 states have internal predecessors, (5413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:54,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 133.0) internal successors, (11837), 89 states have internal predecessors, (11837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:54,451 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 133.0) internal successors, (11837), 89 states have internal predecessors, (11837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:54,451 INFO L186 Difference]: Start difference. First operand has 196 places, 136 transitions, 594 flow. Second operand 88 states and 5413 transitions. [2022-07-21 09:14:54,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 641 transitions, 4912 flow [2022-07-21 09:14:54,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 641 transitions, 4404 flow, removed 238 selfloop flow, removed 21 redundant places. [2022-07-21 09:14:54,471 INFO L242 Difference]: Finished difference. Result has 291 places, 272 transitions, 2610 flow [2022-07-21 09:14:54,472 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=2610, PETRI_PLACES=291, PETRI_TRANSITIONS=272} [2022-07-21 09:14:54,472 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 173 predicate places. [2022-07-21 09:14:54,472 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 272 transitions, 2610 flow [2022-07-21 09:14:54,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 58.08620689655172) internal successors, (3369), 58 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:54,473 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:54,473 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:54,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 09:14:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:54,687 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:54,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:54,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1006484589, now seen corresponding path program 6 times [2022-07-21 09:14:54,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:54,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608626511] [2022-07-21 09:14:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:54,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:14:54,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:54,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608626511] [2022-07-21 09:14:54,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608626511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:54,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810559535] [2022-07-21 09:14:54,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:14:54,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:54,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:54,863 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) [2022-07-21 09:14:54,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:14:54,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:14:54,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:54,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-21 09:14:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:54,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:14:55,190 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:14:55,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:14:55,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 09:14:55,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:14:55,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:14:56,083 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:14:56,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-07-21 09:14:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:56,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:57,450 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:57,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 125 [2022-07-21 09:14:57,482 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-21 09:14:57,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 384 treesize of output 385 [2022-07-21 09:14:57,515 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-21 09:14:57,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 333 treesize of output 307 [2022-07-21 09:14:57,548 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-21 09:14:57,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 255 treesize of output 268 [2022-07-21 09:15:00,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:15:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:00,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810559535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:00,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:00,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 29, 28] total 57 [2022-07-21 09:15:00,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111738782] [2022-07-21 09:15:00,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:00,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 09:15:00,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:00,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 09:15:00,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=2466, Unknown=41, NotChecked=0, Total=3192 [2022-07-21 09:15:00,580 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2022-07-21 09:15:00,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 272 transitions, 2610 flow. Second operand has 57 states, 57 states have (on average 58.1578947368421) internal successors, (3315), 57 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:00,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:00,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2022-07-21 09:15:00,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:05,688 INFO L129 PetriNetUnfolder]: 3315/12899 cut-off events. [2022-07-21 09:15:05,688 INFO L130 PetriNetUnfolder]: For 144794/145016 co-relation queries the response was YES. [2022-07-21 09:15:05,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54014 conditions, 12899 events. 3315/12899 cut-off events. For 144794/145016 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 147316 event pairs, 502 based on Foata normal form. 132/12229 useless extension candidates. Maximal degree in co-relation 53939. Up to 1676 conditions per place. [2022-07-21 09:15:05,813 INFO L132 encePairwiseOnDemand]: 102/133 looper letters, 347 selfloop transitions, 221 changer transitions 118/737 dead transitions. [2022-07-21 09:15:05,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 737 transitions, 9741 flow [2022-07-21 09:15:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-21 09:15:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-21 09:15:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4277 transitions. [2022-07-21 09:15:05,817 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45939849624060153 [2022-07-21 09:15:05,817 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4277 transitions. [2022-07-21 09:15:05,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4277 transitions. [2022-07-21 09:15:05,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:05,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4277 transitions. [2022-07-21 09:15:05,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 61.1) internal successors, (4277), 70 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:05,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 133.0) internal successors, (9443), 71 states have internal predecessors, (9443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:05,831 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 133.0) internal successors, (9443), 71 states have internal predecessors, (9443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:05,831 INFO L186 Difference]: Start difference. First operand has 291 places, 272 transitions, 2610 flow. Second operand 70 states and 4277 transitions. [2022-07-21 09:15:05,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 737 transitions, 9741 flow [2022-07-21 09:15:06,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 737 transitions, 7531 flow, removed 1085 selfloop flow, removed 24 redundant places. [2022-07-21 09:15:06,110 INFO L242 Difference]: Finished difference. Result has 364 places, 418 transitions, 4146 flow [2022-07-21 09:15:06,111 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=4146, PETRI_PLACES=364, PETRI_TRANSITIONS=418} [2022-07-21 09:15:06,111 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 246 predicate places. [2022-07-21 09:15:06,111 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 418 transitions, 4146 flow [2022-07-21 09:15:06,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 58.1578947368421) internal successors, (3315), 57 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:06,112 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:06,113 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:15:06,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 09:15:06,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:06,332 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:06,332 INFO L85 PathProgramCache]: Analyzing trace with hash -918281834, now seen corresponding path program 7 times [2022-07-21 09:15:06,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:06,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112696064] [2022-07-21 09:15:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:06,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 09:15:06,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:06,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112696064] [2022-07-21 09:15:06,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112696064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:06,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271571770] [2022-07-21 09:15:06,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:15:06,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:06,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:06,411 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:06,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:15:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:06,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:15:06,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 37 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:15:06,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 23 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:15:06,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271571770] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:06,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:06,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 15 [2022-07-21 09:15:06,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004404546] [2022-07-21 09:15:06,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:06,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 09:15:06,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:06,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 09:15:06,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:15:06,912 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 133 [2022-07-21 09:15:06,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 418 transitions, 4146 flow. Second operand has 15 states, 15 states have (on average 112.4) internal successors, (1686), 15 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:06,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:06,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 133 [2022-07-21 09:15:06,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:10,573 INFO L129 PetriNetUnfolder]: 2398/14234 cut-off events. [2022-07-21 09:15:10,573 INFO L130 PetriNetUnfolder]: For 199335/200998 co-relation queries the response was YES. [2022-07-21 09:15:10,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61291 conditions, 14234 events. 2398/14234 cut-off events. For 199335/200998 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 178556 event pairs, 580 based on Foata normal form. 313/13388 useless extension candidates. Maximal degree in co-relation 61189. Up to 1915 conditions per place. [2022-07-21 09:15:10,732 INFO L132 encePairwiseOnDemand]: 127/133 looper letters, 306 selfloop transitions, 402 changer transitions 0/844 dead transitions. [2022-07-21 09:15:10,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 844 transitions, 11093 flow [2022-07-21 09:15:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:15:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:15:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 925 transitions. [2022-07-21 09:15:10,733 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8693609022556391 [2022-07-21 09:15:10,733 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 925 transitions. [2022-07-21 09:15:10,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 925 transitions. [2022-07-21 09:15:10,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:10,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 925 transitions. [2022-07-21 09:15:10,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.625) internal successors, (925), 8 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:10,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 133.0) internal successors, (1197), 9 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:10,736 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 133.0) internal successors, (1197), 9 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:10,736 INFO L186 Difference]: Start difference. First operand has 364 places, 418 transitions, 4146 flow. Second operand 8 states and 925 transitions. [2022-07-21 09:15:10,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 844 transitions, 11093 flow [2022-07-21 09:15:11,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 844 transitions, 9719 flow, removed 649 selfloop flow, removed 45 redundant places. [2022-07-21 09:15:11,146 INFO L242 Difference]: Finished difference. Result has 311 places, 791 transitions, 9709 flow [2022-07-21 09:15:11,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9709, PETRI_PLACES=311, PETRI_TRANSITIONS=791} [2022-07-21 09:15:11,147 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 193 predicate places. [2022-07-21 09:15:11,147 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 791 transitions, 9709 flow [2022-07-21 09:15:11,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 112.4) internal successors, (1686), 15 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:11,147 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:11,148 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:15:11,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:11,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:15:11,365 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:11,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1115242029, now seen corresponding path program 8 times [2022-07-21 09:15:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:11,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918925177] [2022-07-21 09:15:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:11,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:11,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:11,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918925177] [2022-07-21 09:15:11,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918925177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:11,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124841620] [2022-07-21 09:15:11,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:15:11,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:11,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:11,504 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:11,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:15:11,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:15:11,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:11,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 09:15:11,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:15:11,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:15:12,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124841620] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:12,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:12,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 39 [2022-07-21 09:15:12,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204330809] [2022-07-21 09:15:12,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:12,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 09:15:12,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 09:15:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 09:15:12,490 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2022-07-21 09:15:12,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 791 transitions, 9709 flow. Second operand has 39 states, 39 states have (on average 96.84615384615384) internal successors, (3777), 39 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:12,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:12,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2022-07-21 09:15:12,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:16,611 INFO L129 PetriNetUnfolder]: 2659/13553 cut-off events. [2022-07-21 09:15:16,611 INFO L130 PetriNetUnfolder]: For 194721/196744 co-relation queries the response was YES. [2022-07-21 09:15:16,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58578 conditions, 13553 events. 2659/13553 cut-off events. For 194721/196744 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 166215 event pairs, 844 based on Foata normal form. 411/12691 useless extension candidates. Maximal degree in co-relation 58488. Up to 2157 conditions per place. [2022-07-21 09:15:16,757 INFO L132 encePairwiseOnDemand]: 115/133 looper letters, 339 selfloop transitions, 90 changer transitions 272/791 dead transitions. [2022-07-21 09:15:16,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 791 transitions, 11746 flow [2022-07-21 09:15:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 09:15:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-21 09:15:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2451 transitions. [2022-07-21 09:15:16,760 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7371428571428571 [2022-07-21 09:15:16,760 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2451 transitions. [2022-07-21 09:15:16,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2451 transitions. [2022-07-21 09:15:16,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:16,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2451 transitions. [2022-07-21 09:15:16,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 98.04) internal successors, (2451), 25 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:16,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 133.0) internal successors, (3458), 26 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:16,767 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 133.0) internal successors, (3458), 26 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:16,767 INFO L186 Difference]: Start difference. First operand has 311 places, 791 transitions, 9709 flow. Second operand 25 states and 2451 transitions. [2022-07-21 09:15:16,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 791 transitions, 11746 flow [2022-07-21 09:15:17,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 791 transitions, 11187 flow, removed 222 selfloop flow, removed 4 redundant places. [2022-07-21 09:15:17,395 INFO L242 Difference]: Finished difference. Result has 336 places, 484 transitions, 5471 flow [2022-07-21 09:15:17,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=6154, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5471, PETRI_PLACES=336, PETRI_TRANSITIONS=484} [2022-07-21 09:15:17,396 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 218 predicate places. [2022-07-21 09:15:17,396 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 484 transitions, 5471 flow [2022-07-21 09:15:17,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 96.84615384615384) internal successors, (3777), 39 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:17,397 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:17,397 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:15:17,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:17,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:15:17,618 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:17,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1228389382, now seen corresponding path program 9 times [2022-07-21 09:15:17,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:17,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882781077] [2022-07-21 09:15:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:17,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:15:17,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:17,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882781077] [2022-07-21 09:15:17,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882781077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:17,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973834839] [2022-07-21 09:15:17,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:15:17,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:17,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:17,802 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:17,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:15:18,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 09:15:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:18,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:15:18,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:15:18,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:15:18,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973834839] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:18,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:18,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-07-21 09:15:18,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665656185] [2022-07-21 09:15:18,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:18,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 09:15:18,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:18,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 09:15:18,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 09:15:18,740 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2022-07-21 09:15:18,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 484 transitions, 5471 flow. Second operand has 43 states, 43 states have (on average 96.6046511627907) internal successors, (4154), 43 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:18,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:18,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2022-07-21 09:15:18,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:21,183 INFO L129 PetriNetUnfolder]: 1079/5426 cut-off events. [2022-07-21 09:15:21,184 INFO L130 PetriNetUnfolder]: For 93411/94338 co-relation queries the response was YES. [2022-07-21 09:15:21,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25693 conditions, 5426 events. 1079/5426 cut-off events. For 93411/94338 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 52567 event pairs, 600 based on Foata normal form. 29/4976 useless extension candidates. Maximal degree in co-relation 25598. Up to 2135 conditions per place. [2022-07-21 09:15:21,248 INFO L132 encePairwiseOnDemand]: 116/133 looper letters, 203 selfloop transitions, 15 changer transitions 58/359 dead transitions. [2022-07-21 09:15:21,249 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 359 transitions, 4239 flow [2022-07-21 09:15:21,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:15:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:15:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3011 transitions. [2022-07-21 09:15:21,251 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7302934756245453 [2022-07-21 09:15:21,251 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3011 transitions. [2022-07-21 09:15:21,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3011 transitions. [2022-07-21 09:15:21,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:21,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3011 transitions. [2022-07-21 09:15:21,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 97.12903225806451) internal successors, (3011), 31 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:21,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 133.0) internal successors, (4256), 32 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:21,257 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 133.0) internal successors, (4256), 32 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:21,257 INFO L186 Difference]: Start difference. First operand has 336 places, 484 transitions, 5471 flow. Second operand 31 states and 3011 transitions. [2022-07-21 09:15:21,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 359 transitions, 4239 flow [2022-07-21 09:15:21,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 359 transitions, 3775 flow, removed 166 selfloop flow, removed 48 redundant places. [2022-07-21 09:15:21,379 INFO L242 Difference]: Finished difference. Result has 285 places, 297 transitions, 2746 flow [2022-07-21 09:15:21,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2746, PETRI_PLACES=285, PETRI_TRANSITIONS=297} [2022-07-21 09:15:21,380 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 167 predicate places. [2022-07-21 09:15:21,380 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 297 transitions, 2746 flow [2022-07-21 09:15:21,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 96.6046511627907) internal successors, (4154), 43 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:21,381 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:21,381 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:15:21,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:21,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:15:21,598 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:21,599 INFO L85 PathProgramCache]: Analyzing trace with hash -211300740, now seen corresponding path program 10 times [2022-07-21 09:15:21,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:21,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727465067] [2022-07-21 09:15:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:21,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:22,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:22,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727465067] [2022-07-21 09:15:22,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727465067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:22,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133692801] [2022-07-21 09:15:22,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:15:22,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:22,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:22,268 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:22,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:15:22,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:15:22,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:22,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-21 09:15:22,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:23,482 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:15:23,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-07-21 09:15:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:23,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:23,949 INFO L356 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2022-07-21 09:15:23,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 64 [2022-07-21 09:15:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:25,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133692801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:25,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:25,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 25] total 68 [2022-07-21 09:15:25,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969618372] [2022-07-21 09:15:25,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:25,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-21 09:15:25,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:25,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-21 09:15:25,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=3726, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 09:15:25,375 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2022-07-21 09:15:25,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 297 transitions, 2746 flow. Second operand has 68 states, 68 states have (on average 67.92647058823529) internal successors, (4619), 68 states have internal predecessors, (4619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:25,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:25,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2022-07-21 09:15:25,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:36,861 INFO L129 PetriNetUnfolder]: 6893/25563 cut-off events. [2022-07-21 09:15:36,861 INFO L130 PetriNetUnfolder]: For 257937/258270 co-relation queries the response was YES. [2022-07-21 09:15:37,323 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107456 conditions, 25563 events. 6893/25563 cut-off events. For 257937/258270 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 310334 event pairs, 968 based on Foata normal form. 198/24343 useless extension candidates. Maximal degree in co-relation 107383. Up to 3670 conditions per place. [2022-07-21 09:15:37,456 INFO L132 encePairwiseOnDemand]: 98/133 looper letters, 468 selfloop transitions, 479 changer transitions 164/1168 dead transitions. [2022-07-21 09:15:37,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1168 transitions, 15308 flow [2022-07-21 09:15:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-21 09:15:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2022-07-21 09:15:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 8197 transitions. [2022-07-21 09:15:37,466 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5267656320287899 [2022-07-21 09:15:37,466 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 8197 transitions. [2022-07-21 09:15:37,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 8197 transitions. [2022-07-21 09:15:37,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:37,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 8197 transitions. [2022-07-21 09:15:37,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 70.05982905982906) internal successors, (8197), 117 states have internal predecessors, (8197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:37,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 133.0) internal successors, (15694), 118 states have internal predecessors, (15694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:37,494 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 133.0) internal successors, (15694), 118 states have internal predecessors, (15694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:37,495 INFO L186 Difference]: Start difference. First operand has 285 places, 297 transitions, 2746 flow. Second operand 117 states and 8197 transitions. [2022-07-21 09:15:37,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1168 transitions, 15308 flow [2022-07-21 09:15:37,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1168 transitions, 14092 flow, removed 590 selfloop flow, removed 37 redundant places. [2022-07-21 09:15:37,866 INFO L242 Difference]: Finished difference. Result has 415 places, 688 transitions, 10587 flow [2022-07-21 09:15:37,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=10587, PETRI_PLACES=415, PETRI_TRANSITIONS=688} [2022-07-21 09:15:37,867 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 297 predicate places. [2022-07-21 09:15:37,867 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 688 transitions, 10587 flow [2022-07-21 09:15:37,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 67.92647058823529) internal successors, (4619), 68 states have internal predecessors, (4619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:37,868 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:37,868 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:15:37,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:38,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 09:15:38,086 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:38,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2133377927, now seen corresponding path program 11 times [2022-07-21 09:15:38,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:38,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686928849] [2022-07-21 09:15:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:38,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:38,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686928849] [2022-07-21 09:15:38,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686928849] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103858150] [2022-07-21 09:15:38,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:15:38,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:38,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:38,873 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:38,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:15:38,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 09:15:38,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:38,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-21 09:15:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:39,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:15:39,313 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:15:39,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:15:39,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 09:15:39,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 09:15:40,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:15:40,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:15:41,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:15:41,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:15:41,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:15:41,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:15:41,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:15:41,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:15:41,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:15:41,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:15:41,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:15:41,808 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:15:41,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 27 [2022-07-21 09:15:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:41,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:45,085 INFO L356 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-07-21 09:15:45,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 344 treesize of output 189 [2022-07-21 09:15:45,173 INFO L356 Elim1Store]: treesize reduction 140, result has 46.4 percent of original size [2022-07-21 09:15:45,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 528 treesize of output 570 [2022-07-21 09:15:45,261 INFO L356 Elim1Store]: treesize reduction 140, result has 46.4 percent of original size [2022-07-21 09:15:45,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 450 treesize of output 450 [2022-07-21 09:15:45,350 INFO L356 Elim1Store]: treesize reduction 140, result has 46.4 percent of original size [2022-07-21 09:15:45,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 330 treesize of output 390 [2022-07-21 09:15:56,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:15:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:57,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103858150] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:57,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:57,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 35, 35] total 91 [2022-07-21 09:15:57,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394241507] [2022-07-21 09:15:57,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:57,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-21 09:15:57,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:57,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-21 09:15:57,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=6876, Unknown=61, NotChecked=0, Total=8190 [2022-07-21 09:15:57,045 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2022-07-21 09:15:57,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 688 transitions, 10587 flow. Second operand has 91 states, 91 states have (on average 57.395604395604394) internal successors, (5223), 91 states have internal predecessors, (5223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:57,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:57,047 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2022-07-21 09:15:57,047 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand