./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-simple-queue.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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:20:35,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:20:35,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:20:35,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:20:35,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:20:35,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:20:35,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:20:35,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:20:35,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:20:35,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:20:35,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:20:35,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:20:35,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:20:35,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:20:35,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:20:35,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:20:35,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:20:35,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:20:35,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:20:35,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:20:35,701 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:20:35,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:20:35,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:20:35,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:20:35,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:20:35,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:20:35,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:20:35,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:20:35,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:20:35,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:20:35,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:20:35,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:20:35,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:20:35,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:20:35,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:20:35,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:20:35,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:20:35,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:20:35,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:20:35,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:20:35,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:20:35,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:20:35,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:20:35,740 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:20:35,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:20:35,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:20:35,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:20:35,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:20:35,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:20:35,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:20:35,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:20:35,742 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:20:35,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:20:35,743 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:20:35,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:20:35,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:20:35,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:20:35,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:20:35,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:20:35,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:20:35,744 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:20:35,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:20:35,745 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:20:35,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:20:35,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:20:35,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:20:35,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:20:35,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:20:35,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:20:35,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:20:35,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:20:35,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:20:35,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:20:35,747 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:20:35,748 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:20:35,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:20:35,748 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-07-13 22:20:35,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:20:35,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:20:35,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:20:35,929 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:20:35,930 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:20:35,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-07-13 22:20:35,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e3120655/553bbc16290b44efba85f046867f8e1e/FLAGac907c870 [2022-07-13 22:20:36,333 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:20:36,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-07-13 22:20:36,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e3120655/553bbc16290b44efba85f046867f8e1e/FLAGac907c870 [2022-07-13 22:20:36,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e3120655/553bbc16290b44efba85f046867f8e1e [2022-07-13 22:20:36,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:20:36,745 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:20:36,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:20:36,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:20:36,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:20:36,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:20:36" (1/1) ... [2022-07-13 22:20:36,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18613864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:36, skipping insertion in model container [2022-07-13 22:20:36,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:20:36" (1/1) ... [2022-07-13 22:20:36,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:20:36,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:20:36,962 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-simple-queue.wvr.c[2438,2451] [2022-07-13 22:20:36,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:20:36,980 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:20:37,013 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-simple-queue.wvr.c[2438,2451] [2022-07-13 22:20:37,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:20:37,028 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:20:37,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37 WrapperNode [2022-07-13 22:20:37,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:20:37,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:20:37,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:20:37,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:20:37,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37" (1/1) ... [2022-07-13 22:20:37,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37" (1/1) ... [2022-07-13 22:20:37,066 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 128 [2022-07-13 22:20:37,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:20:37,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:20:37,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:20:37,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:20:37,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37" (1/1) ... [2022-07-13 22:20:37,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37" (1/1) ... [2022-07-13 22:20:37,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37" (1/1) ... [2022-07-13 22:20:37,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37" (1/1) ... [2022-07-13 22:20:37,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37" (1/1) ... [2022-07-13 22:20:37,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37" (1/1) ... [2022-07-13 22:20:37,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37" (1/1) ... [2022-07-13 22:20:37,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:20:37,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:20:37,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:20:37,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:20:37,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37" (1/1) ... [2022-07-13 22:20:37,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:20:37,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:37,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:20:37,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:20:37,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:20:37,187 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:20:37,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:20:37,188 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:20:37,188 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:20:37,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:20:37,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:20:37,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:20:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:20:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:20:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:20:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:20:37,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:20:37,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:20:37,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:20:37,193 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:20:37,246 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:20:37,247 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:20:37,492 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:20:37,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:20:37,562 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 22:20:37,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:20:37 BoogieIcfgContainer [2022-07-13 22:20:37,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:20:37,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:20:37,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:20:37,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:20:37,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:20:36" (1/3) ... [2022-07-13 22:20:37,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329b30ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:20:37, skipping insertion in model container [2022-07-13 22:20:37,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:37" (2/3) ... [2022-07-13 22:20:37,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329b30ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:20:37, skipping insertion in model container [2022-07-13 22:20:37,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:20:37" (3/3) ... [2022-07-13 22:20:37,577 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-07-13 22:20:37,580 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:20:37,585 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:20:37,586 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:20:37,586 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:20:37,643 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:20:37,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2022-07-13 22:20:37,711 INFO L129 PetriNetUnfolder]: 9/118 cut-off events. [2022-07-13 22:20:37,712 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:20:37,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-07-13 22:20:37,714 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 256 flow [2022-07-13 22:20:37,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2022-07-13 22:20:37,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:20:37,727 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@151412fb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6e33a1a2 [2022-07-13 22:20:37,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:20:37,769 INFO L129 PetriNetUnfolder]: 9/108 cut-off events. [2022-07-13 22:20:37,769 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:20:37,769 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:37,770 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] [2022-07-13 22:20:37,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:37,774 INFO L85 PathProgramCache]: Analyzing trace with hash -93732278, now seen corresponding path program 1 times [2022-07-13 22:20:37,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:37,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239179560] [2022-07-13 22:20:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:37,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:37,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:37,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239179560] [2022-07-13 22:20:37,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239179560] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:37,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:20:37,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:20:37,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647706203] [2022-07-13 22:20:37,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:37,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:20:37,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:37,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:20:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:20:37,962 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 120 [2022-07-13 22:20:37,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:37,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:37,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 120 [2022-07-13 22:20:37,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:38,001 INFO L129 PetriNetUnfolder]: 5/105 cut-off events. [2022-07-13 22:20:38,004 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 22:20:38,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 105 events. 5/105 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2022-07-13 22:20:38,007 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 6 selfloop transitions, 0 changer transitions 3/103 dead transitions. [2022-07-13 22:20:38,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 230 flow [2022-07-13 22:20:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:20:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:20:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2022-07-13 22:20:38,017 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9416666666666667 [2022-07-13 22:20:38,018 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2022-07-13 22:20:38,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2022-07-13 22:20:38,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:38,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2022-07-13 22:20:38,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 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) [2022-07-13 22:20:38,030 INFO L81 ComplementDD]: Finished complementDD. Result has 3 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) [2022-07-13 22:20:38,031 INFO L186 Difference]: Start difference. First operand has 107 places, 109 transitions, 230 flow. Second operand 2 states and 226 transitions. [2022-07-13 22:20:38,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 230 flow [2022-07-13 22:20:38,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 103 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:20:38,041 INFO L242 Difference]: Finished difference. Result has 104 places, 100 transitions, 204 flow [2022-07-13 22:20:38,042 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-07-13 22:20:38,045 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, -3 predicate places. [2022-07-13 22:20:38,045 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 204 flow [2022-07-13 22:20:38,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,046 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:38,046 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] [2022-07-13 22:20:38,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:20:38,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:38,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1102375271, now seen corresponding path program 1 times [2022-07-13 22:20:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:38,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355939028] [2022-07-13 22:20:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:38,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:38,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:38,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355939028] [2022-07-13 22:20:38,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355939028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:38,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:20:38,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:20:38,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647161341] [2022-07-13 22:20:38,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:38,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:20:38,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:20:38,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:20:38,268 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-13 22:20:38,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:38,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-13 22:20:38,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:38,321 INFO L129 PetriNetUnfolder]: 7/120 cut-off events. [2022-07-13 22:20:38,322 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:20:38,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 120 events. 7/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 152. Up to 15 conditions per place. [2022-07-13 22:20:38,323 INFO L132 encePairwiseOnDemand]: 115/120 looper letters, 21 selfloop transitions, 2 changer transitions 4/107 dead transitions. [2022-07-13 22:20:38,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 274 flow [2022-07-13 22:20:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:20:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:20:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2022-07-13 22:20:38,325 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7966666666666666 [2022-07-13 22:20:38,325 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2022-07-13 22:20:38,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2022-07-13 22:20:38,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:38,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2022-07-13 22:20:38,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,329 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,329 INFO L186 Difference]: Start difference. First operand has 104 places, 100 transitions, 204 flow. Second operand 5 states and 478 transitions. [2022-07-13 22:20:38,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 274 flow [2022-07-13 22:20:38,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:20:38,332 INFO L242 Difference]: Finished difference. Result has 108 places, 101 transitions, 220 flow [2022-07-13 22:20:38,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-07-13 22:20:38,332 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2022-07-13 22:20:38,333 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 220 flow [2022-07-13 22:20:38,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:38,333 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] [2022-07-13 22:20:38,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:20:38,334 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:38,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:38,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1844346479, now seen corresponding path program 1 times [2022-07-13 22:20:38,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:38,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605299285] [2022-07-13 22:20:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:38,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:38,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:38,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605299285] [2022-07-13 22:20:38,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605299285] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:38,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:20:38,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:20:38,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163847948] [2022-07-13 22:20:38,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:38,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:20:38,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:38,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:20:38,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:20:38,471 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-07-13 22:20:38,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:38,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-07-13 22:20:38,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:38,500 INFO L129 PetriNetUnfolder]: 8/142 cut-off events. [2022-07-13 22:20:38,501 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-07-13 22:20:38,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 142 events. 8/142 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 193 event pairs, 1 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 177. Up to 18 conditions per place. [2022-07-13 22:20:38,502 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 11 selfloop transitions, 2 changer transitions 2/105 dead transitions. [2022-07-13 22:20:38,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 261 flow [2022-07-13 22:20:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:20:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:20:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-07-13 22:20:38,505 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-13 22:20:38,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-07-13 22:20:38,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-07-13 22:20:38,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:38,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-07-13 22:20:38,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,507 INFO L186 Difference]: Start difference. First operand has 108 places, 101 transitions, 220 flow. Second operand 3 states and 324 transitions. [2022-07-13 22:20:38,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 261 flow [2022-07-13 22:20:38,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 255 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 22:20:38,509 INFO L242 Difference]: Finished difference. Result has 106 places, 102 transitions, 226 flow [2022-07-13 22:20:38,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2022-07-13 22:20:38,509 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2022-07-13 22:20:38,510 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 226 flow [2022-07-13 22:20:38,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,510 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:38,510 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] [2022-07-13 22:20:38,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:20:38,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:38,511 INFO L85 PathProgramCache]: Analyzing trace with hash 488492189, now seen corresponding path program 1 times [2022-07-13 22:20:38,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:38,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022337732] [2022-07-13 22:20:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:38,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:20:38,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:38,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022337732] [2022-07-13 22:20:38,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022337732] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:38,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:20:38,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:20:38,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298548356] [2022-07-13 22:20:38,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:38,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:20:38,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:38,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:20:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:20:38,621 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 120 [2022-07-13 22:20:38,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:38,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 120 [2022-07-13 22:20:38,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:38,723 INFO L129 PetriNetUnfolder]: 8/185 cut-off events. [2022-07-13 22:20:38,723 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-13 22:20:38,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 185 events. 8/185 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 363 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 247. Up to 28 conditions per place. [2022-07-13 22:20:38,725 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 20 selfloop transitions, 6 changer transitions 5/111 dead transitions. [2022-07-13 22:20:38,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 310 flow [2022-07-13 22:20:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:20:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:20:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2022-07-13 22:20:38,727 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8107142857142857 [2022-07-13 22:20:38,727 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2022-07-13 22:20:38,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2022-07-13 22:20:38,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:38,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2022-07-13 22:20:38,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,733 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,733 INFO L186 Difference]: Start difference. First operand has 106 places, 102 transitions, 226 flow. Second operand 7 states and 681 transitions. [2022-07-13 22:20:38,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 310 flow [2022-07-13 22:20:38,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:20:38,739 INFO L242 Difference]: Finished difference. Result has 113 places, 103 transitions, 246 flow [2022-07-13 22:20:38,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=246, PETRI_PLACES=113, PETRI_TRANSITIONS=103} [2022-07-13 22:20:38,740 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 6 predicate places. [2022-07-13 22:20:38,744 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 103 transitions, 246 flow [2022-07-13 22:20:38,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:38,745 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:38,745 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] [2022-07-13 22:20:38,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:20:38,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash -968534906, now seen corresponding path program 1 times [2022-07-13 22:20:38,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:38,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970119372] [2022-07-13 22:20:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:39,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:39,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970119372] [2022-07-13 22:20:39,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970119372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:39,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581529911] [2022-07-13 22:20:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:39,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:39,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:39,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:20:39,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:20:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:39,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-13 22:20:39,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:39,406 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 [2022-07-13 22:20:39,455 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:20:39,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2022-07-13 22:20:39,759 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:20:39,760 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 15 treesize of output 15 [2022-07-13 22:20:39,875 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 [2022-07-13 22:20:40,117 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 [2022-07-13 22:20:40,171 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 [2022-07-13 22:20:40,292 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 [2022-07-13 22:20:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:40,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:20:40,978 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:20:40,979 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 60 treesize of output 48 [2022-07-13 22:20:40,986 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:20:40,987 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 140 treesize of output 131 [2022-07-13 22:20:40,994 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:20:40,995 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 124 treesize of output 100 [2022-07-13 22:20:41,001 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:20:41,002 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 79 treesize of output 67 [2022-07-13 22:20:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:41,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581529911] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:20:41,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:20:41,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 50 [2022-07-13 22:20:41,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041359308] [2022-07-13 22:20:41,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:20:41,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 22:20:41,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:41,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 22:20:41,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1985, Unknown=32, NotChecked=0, Total=2450 [2022-07-13 22:20:41,506 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-07-13 22:20:41,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 103 transitions, 246 flow. Second operand has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:41,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:41,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-07-13 22:20:41,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:43,407 INFO L129 PetriNetUnfolder]: 89/629 cut-off events. [2022-07-13 22:20:43,407 INFO L130 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2022-07-13 22:20:43,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 629 events. 89/629 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3639 event pairs, 0 based on Foata normal form. 4/589 useless extension candidates. Maximal degree in co-relation 1064. Up to 71 conditions per place. [2022-07-13 22:20:43,411 INFO L132 encePairwiseOnDemand]: 95/120 looper letters, 114 selfloop transitions, 44 changer transitions 25/225 dead transitions. [2022-07-13 22:20:43,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 225 transitions, 964 flow [2022-07-13 22:20:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 22:20:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-13 22:20:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2008 transitions. [2022-07-13 22:20:43,417 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44035087719298244 [2022-07-13 22:20:43,417 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2008 transitions. [2022-07-13 22:20:43,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2008 transitions. [2022-07-13 22:20:43,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:43,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2008 transitions. [2022-07-13 22:20:43,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.8421052631579) internal successors, (2008), 38 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:43,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:43,426 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:43,427 INFO L186 Difference]: Start difference. First operand has 113 places, 103 transitions, 246 flow. Second operand 38 states and 2008 transitions. [2022-07-13 22:20:43,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 225 transitions, 964 flow [2022-07-13 22:20:43,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 225 transitions, 950 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-07-13 22:20:43,431 INFO L242 Difference]: Finished difference. Result has 163 places, 139 transitions, 552 flow [2022-07-13 22:20:43,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=552, PETRI_PLACES=163, PETRI_TRANSITIONS=139} [2022-07-13 22:20:43,431 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 56 predicate places. [2022-07-13 22:20:43,432 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 139 transitions, 552 flow [2022-07-13 22:20:43,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:43,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:43,433 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] [2022-07-13 22:20:43,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:20:43,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:43,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:43,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:43,642 INFO L85 PathProgramCache]: Analyzing trace with hash 194607390, now seen corresponding path program 2 times [2022-07-13 22:20:43,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:43,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396903835] [2022-07-13 22:20:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:43,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:44,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:44,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396903835] [2022-07-13 22:20:44,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396903835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:44,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142862078] [2022-07-13 22:20:44,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:20:44,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:44,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:44,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:20:44,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:20:44,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:20:44,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:44,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 22:20:44,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:44,479 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 15 treesize of output 11 [2022-07-13 22:20:44,743 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 [2022-07-13 22:20:44,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:20:44,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:20:44,943 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 [2022-07-13 22:20:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:44,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:20:44,996 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_98 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_98) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-13 22:20:45,521 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:20:45,522 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 57 treesize of output 45 [2022-07-13 22:20:45,528 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:20:45,528 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 100 treesize of output 100 [2022-07-13 22:20:45,535 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 60 treesize of output 48 [2022-07-13 22:20:45,566 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:20:45,566 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 51 treesize of output 55 [2022-07-13 22:20:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-13 22:20:46,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142862078] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:20:46,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:20:46,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 54 [2022-07-13 22:20:46,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127861116] [2022-07-13 22:20:46,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:20:46,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-13 22:20:46,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:46,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-13 22:20:46,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2539, Unknown=11, NotChecked=102, Total=2862 [2022-07-13 22:20:46,111 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-07-13 22:20:46,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 139 transitions, 552 flow. Second operand has 54 states, 54 states have (on average 50.574074074074076) internal successors, (2731), 54 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:46,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:46,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-07-13 22:20:46,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:48,492 INFO L129 PetriNetUnfolder]: 178/1123 cut-off events. [2022-07-13 22:20:48,493 INFO L130 PetriNetUnfolder]: For 1080/1088 co-relation queries the response was YES. [2022-07-13 22:20:48,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2315 conditions, 1123 events. 178/1123 cut-off events. For 1080/1088 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8552 event pairs, 5 based on Foata normal form. 12/1045 useless extension candidates. Maximal degree in co-relation 2289. Up to 170 conditions per place. [2022-07-13 22:20:48,502 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 96 selfloop transitions, 85 changer transitions 15/238 dead transitions. [2022-07-13 22:20:48,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 238 transitions, 1432 flow [2022-07-13 22:20:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 22:20:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-13 22:20:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1976 transitions. [2022-07-13 22:20:48,507 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-07-13 22:20:48,507 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1976 transitions. [2022-07-13 22:20:48,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1976 transitions. [2022-07-13 22:20:48,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:48,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1976 transitions. [2022-07-13 22:20:48,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.0) internal successors, (1976), 38 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:48,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:48,519 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:48,520 INFO L186 Difference]: Start difference. First operand has 163 places, 139 transitions, 552 flow. Second operand 38 states and 1976 transitions. [2022-07-13 22:20:48,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 238 transitions, 1432 flow [2022-07-13 22:20:48,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 238 transitions, 1263 flow, removed 72 selfloop flow, removed 19 redundant places. [2022-07-13 22:20:48,532 INFO L242 Difference]: Finished difference. Result has 184 places, 185 transitions, 1018 flow [2022-07-13 22:20:48,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1018, PETRI_PLACES=184, PETRI_TRANSITIONS=185} [2022-07-13 22:20:48,534 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 77 predicate places. [2022-07-13 22:20:48,534 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 185 transitions, 1018 flow [2022-07-13 22:20:48,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 50.574074074074076) internal successors, (2731), 54 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:48,535 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:48,535 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 22:20:48,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 22:20:48,768 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,SelfDestructingSolverStorable5 [2022-07-13 22:20:48,768 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:48,769 INFO L85 PathProgramCache]: Analyzing trace with hash 970602436, now seen corresponding path program 3 times [2022-07-13 22:20:48,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:48,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615945949] [2022-07-13 22:20:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:48,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:20:48,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:48,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615945949] [2022-07-13 22:20:48,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615945949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:48,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:20:48,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:20:48,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110801008] [2022-07-13 22:20:48,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:48,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:20:48,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:48,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:20:48,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:20:48,833 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-07-13 22:20:48,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 185 transitions, 1018 flow. Second operand has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:48,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:48,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-07-13 22:20:48,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:48,944 INFO L129 PetriNetUnfolder]: 124/1041 cut-off events. [2022-07-13 22:20:48,945 INFO L130 PetriNetUnfolder]: For 1657/1721 co-relation queries the response was YES. [2022-07-13 22:20:48,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2191 conditions, 1041 events. 124/1041 cut-off events. For 1657/1721 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8080 event pairs, 9 based on Foata normal form. 24/978 useless extension candidates. Maximal degree in co-relation 2164. Up to 178 conditions per place. [2022-07-13 22:20:48,950 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 55 selfloop transitions, 30 changer transitions 2/197 dead transitions. [2022-07-13 22:20:48,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 197 transitions, 1280 flow [2022-07-13 22:20:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:20:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:20:48,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 432 transitions. [2022-07-13 22:20:48,951 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-13 22:20:48,951 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 432 transitions. [2022-07-13 22:20:48,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 432 transitions. [2022-07-13 22:20:48,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:48,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 432 transitions. [2022-07-13 22:20:48,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:48,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:48,953 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:48,954 INFO L186 Difference]: Start difference. First operand has 184 places, 185 transitions, 1018 flow. Second operand 4 states and 432 transitions. [2022-07-13 22:20:48,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 197 transitions, 1280 flow [2022-07-13 22:20:48,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 197 transitions, 1193 flow, removed 20 selfloop flow, removed 26 redundant places. [2022-07-13 22:20:48,961 INFO L242 Difference]: Finished difference. Result has 158 places, 189 transitions, 1108 flow [2022-07-13 22:20:48,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1108, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2022-07-13 22:20:48,961 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 51 predicate places. [2022-07-13 22:20:48,962 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 1108 flow [2022-07-13 22:20:48,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:48,962 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:48,962 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] [2022-07-13 22:20:48,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:20:48,962 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash -455356886, now seen corresponding path program 4 times [2022-07-13 22:20:48,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:48,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199569928] [2022-07-13 22:20:48,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:48,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 22:20:49,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:49,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199569928] [2022-07-13 22:20:49,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199569928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:49,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611066639] [2022-07-13 22:20:49,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:20:49,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:49,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:49,037 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:20:49,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:20:49,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:20:49,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:20:49,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:20:49,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:20:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:20:49,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611066639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:20:49,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:20:49,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-13 22:20:49,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871836394] [2022-07-13 22:20:49,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:20:49,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:20:49,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:49,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:20:49,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:20:49,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-13 22:20:49,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 1108 flow. Second operand has 19 states, 19 states have (on average 92.63157894736842) internal successors, (1760), 19 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:49,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:49,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-13 22:20:49,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:49,518 INFO L129 PetriNetUnfolder]: 45/592 cut-off events. [2022-07-13 22:20:49,518 INFO L130 PetriNetUnfolder]: For 1096/1133 co-relation queries the response was YES. [2022-07-13 22:20:49,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 592 events. 45/592 cut-off events. For 1096/1133 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3467 event pairs, 11 based on Foata normal form. 11/554 useless extension candidates. Maximal degree in co-relation 1210. Up to 103 conditions per place. [2022-07-13 22:20:49,521 INFO L132 encePairwiseOnDemand]: 109/120 looper letters, 48 selfloop transitions, 11 changer transitions 21/159 dead transitions. [2022-07-13 22:20:49,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 159 transitions, 917 flow [2022-07-13 22:20:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 22:20:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 22:20:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2022-07-13 22:20:49,525 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7798611111111111 [2022-07-13 22:20:49,525 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2022-07-13 22:20:49,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2022-07-13 22:20:49,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:49,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2022-07-13 22:20:49,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:49,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 120.0) internal successors, (1560), 13 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:49,530 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 120.0) internal successors, (1560), 13 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:49,530 INFO L186 Difference]: Start difference. First operand has 158 places, 189 transitions, 1108 flow. Second operand 12 states and 1123 transitions. [2022-07-13 22:20:49,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 159 transitions, 917 flow [2022-07-13 22:20:49,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 159 transitions, 895 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-07-13 22:20:49,538 INFO L242 Difference]: Finished difference. Result has 163 places, 134 transitions, 632 flow [2022-07-13 22:20:49,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=632, PETRI_PLACES=163, PETRI_TRANSITIONS=134} [2022-07-13 22:20:49,541 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 56 predicate places. [2022-07-13 22:20:49,541 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 134 transitions, 632 flow [2022-07-13 22:20:49,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 92.63157894736842) internal successors, (1760), 19 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:49,542 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:49,542 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:49,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:20:49,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:49,759 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash -458696651, now seen corresponding path program 5 times [2022-07-13 22:20:49,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:49,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770532451] [2022-07-13 22:20:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:49,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:50,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:50,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770532451] [2022-07-13 22:20:50,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770532451] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:50,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427254616] [2022-07-13 22:20:50,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:20:50,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:50,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:50,246 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:20:50,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:20:50,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:20:50,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-13 22:20:50,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:50,322 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 [2022-07-13 22:20:50,461 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:20:50,461 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 [2022-07-13 22:20:50,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-13 22:20:51,127 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 19 treesize of output 7 [2022-07-13 22:20:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:51,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:20:51,342 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:20:51,342 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 42 treesize of output 42 [2022-07-13 22:20:51,346 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 13 treesize of output 7 [2022-07-13 22:20:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:52,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427254616] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:20:52,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:20:52,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 58 [2022-07-13 22:20:52,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665344467] [2022-07-13 22:20:52,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:20:52,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-13 22:20:52,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:52,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-13 22:20:52,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2022-07-13 22:20:52,268 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-13 22:20:52,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 134 transitions, 632 flow. Second operand has 58 states, 58 states have (on average 51.6551724137931) internal successors, (2996), 58 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:52,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:52,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-13 22:20:52,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:55,873 INFO L129 PetriNetUnfolder]: 259/1704 cut-off events. [2022-07-13 22:20:55,874 INFO L130 PetriNetUnfolder]: For 3342/3346 co-relation queries the response was YES. [2022-07-13 22:20:55,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4083 conditions, 1704 events. 259/1704 cut-off events. For 3342/3346 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14766 event pairs, 8 based on Foata normal form. 14/1582 useless extension candidates. Maximal degree in co-relation 4061. Up to 213 conditions per place. [2022-07-13 22:20:55,884 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 156 selfloop transitions, 91 changer transitions 49/338 dead transitions. [2022-07-13 22:20:55,891 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 338 transitions, 2566 flow [2022-07-13 22:20:55,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-13 22:20:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-13 22:20:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3082 transitions. [2022-07-13 22:20:55,895 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.442816091954023 [2022-07-13 22:20:55,895 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3082 transitions. [2022-07-13 22:20:55,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3082 transitions. [2022-07-13 22:20:55,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:55,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3082 transitions. [2022-07-13 22:20:55,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.13793103448276) internal successors, (3082), 58 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:55,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 120.0) internal successors, (7080), 59 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:55,909 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 120.0) internal successors, (7080), 59 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:55,910 INFO L186 Difference]: Start difference. First operand has 163 places, 134 transitions, 632 flow. Second operand 58 states and 3082 transitions. [2022-07-13 22:20:55,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 338 transitions, 2566 flow [2022-07-13 22:20:55,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 338 transitions, 2402 flow, removed 66 selfloop flow, removed 14 redundant places. [2022-07-13 22:20:55,921 INFO L242 Difference]: Finished difference. Result has 225 places, 195 transitions, 1554 flow [2022-07-13 22:20:55,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=1554, PETRI_PLACES=225, PETRI_TRANSITIONS=195} [2022-07-13 22:20:55,922 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 118 predicate places. [2022-07-13 22:20:55,922 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 195 transitions, 1554 flow [2022-07-13 22:20:55,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 51.6551724137931) internal successors, (2996), 58 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:55,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:55,923 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 22:20:55,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 22:20:56,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:56,139 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:56,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1601581429, now seen corresponding path program 6 times [2022-07-13 22:20:56,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:56,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236188599] [2022-07-13 22:20:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:56,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:56,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:56,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236188599] [2022-07-13 22:20:56,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236188599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:56,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672658265] [2022-07-13 22:20:56,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:20:56,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:56,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:56,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:20:56,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:20:56,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 22:20:56,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:56,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-13 22:20:56,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:57,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 [2022-07-13 22:20:57,272 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 [2022-07-13 22:20:57,374 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 [2022-07-13 22:20:57,588 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:20:57,588 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 23 treesize of output 10 [2022-07-13 22:20:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:57,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:20:58,446 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:20:58,446 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 61 treesize of output 49 [2022-07-13 22:20:58,454 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-13 22:20:58,455 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 144 treesize of output 136 [2022-07-13 22:20:58,461 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 22:20:58,461 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 127 treesize of output 101 [2022-07-13 22:20:58,469 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 22:20:58,469 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 80 treesize of output 67 [2022-07-13 22:20:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:59,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672658265] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:20:59,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:20:59,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 23] total 61 [2022-07-13 22:20:59,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65664461] [2022-07-13 22:20:59,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:20:59,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-13 22:20:59,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:59,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-13 22:20:59,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=3216, Unknown=36, NotChecked=0, Total=3660 [2022-07-13 22:20:59,120 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-07-13 22:20:59,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 195 transitions, 1554 flow. Second operand has 61 states, 61 states have (on average 53.50819672131148) internal successors, (3264), 61 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:59,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:59,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-07-13 22:20:59,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:02,299 INFO L129 PetriNetUnfolder]: 517/2812 cut-off events. [2022-07-13 22:21:02,299 INFO L130 PetriNetUnfolder]: For 13830/13891 co-relation queries the response was YES. [2022-07-13 22:21:02,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8491 conditions, 2812 events. 517/2812 cut-off events. For 13830/13891 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 27202 event pairs, 19 based on Foata normal form. 36/2628 useless extension candidates. Maximal degree in co-relation 8442. Up to 440 conditions per place. [2022-07-13 22:21:02,358 INFO L132 encePairwiseOnDemand]: 87/120 looper letters, 176 selfloop transitions, 140 changer transitions 30/391 dead transitions. [2022-07-13 22:21:02,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 391 transitions, 4023 flow [2022-07-13 22:21:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-13 22:21:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-13 22:21:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2660 transitions. [2022-07-13 22:21:02,370 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2022-07-13 22:21:02,370 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2660 transitions. [2022-07-13 22:21:02,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2660 transitions. [2022-07-13 22:21:02,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:02,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2660 transitions. [2022-07-13 22:21:02,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.416666666666664) internal successors, (2660), 48 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:02,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:02,389 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:02,389 INFO L186 Difference]: Start difference. First operand has 225 places, 195 transitions, 1554 flow. Second operand 48 states and 2660 transitions. [2022-07-13 22:21:02,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 391 transitions, 4023 flow [2022-07-13 22:21:02,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 391 transitions, 3690 flow, removed 147 selfloop flow, removed 31 redundant places. [2022-07-13 22:21:02,413 INFO L242 Difference]: Finished difference. Result has 246 places, 286 transitions, 2961 flow [2022-07-13 22:21:02,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2961, PETRI_PLACES=246, PETRI_TRANSITIONS=286} [2022-07-13 22:21:02,414 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 139 predicate places. [2022-07-13 22:21:02,414 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 286 transitions, 2961 flow [2022-07-13 22:21:02,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 53.50819672131148) internal successors, (3264), 61 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:02,415 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:02,415 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 22:21:02,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:21:02,632 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,SelfDestructingSolverStorable9 [2022-07-13 22:21:02,633 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:21:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:02,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1615726847, now seen corresponding path program 7 times [2022-07-13 22:21:02,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:02,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157656180] [2022-07-13 22:21:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:02,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:03,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157656180] [2022-07-13 22:21:03,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157656180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645071146] [2022-07-13 22:21:03,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:21:03,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:03,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:03,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:21:03,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:21:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:03,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 22:21:03,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:03,635 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:21:03,635 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 23 treesize of output 10 [2022-07-13 22:21:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:03,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:03,744 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-13 22:21:03,744 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 25 treesize of output 17 [2022-07-13 22:21:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:04,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645071146] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:04,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:04,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 45 [2022-07-13 22:21:04,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835799561] [2022-07-13 22:21:04,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:04,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-13 22:21:04,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:04,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-13 22:21:04,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 22:21:04,471 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-13 22:21:04,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 286 transitions, 2961 flow. Second operand has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:04,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:04,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-13 22:21:04,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:07,732 INFO L129 PetriNetUnfolder]: 1034/5302 cut-off events. [2022-07-13 22:21:07,732 INFO L130 PetriNetUnfolder]: For 50600/50832 co-relation queries the response was YES. [2022-07-13 22:21:07,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21835 conditions, 5302 events. 1034/5302 cut-off events. For 50600/50832 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 58106 event pairs, 4 based on Foata normal form. 93/4996 useless extension candidates. Maximal degree in co-relation 21781. Up to 956 conditions per place. [2022-07-13 22:21:07,771 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 283 selfloop transitions, 288 changer transitions 62/681 dead transitions. [2022-07-13 22:21:07,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 681 transitions, 9896 flow [2022-07-13 22:21:07,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-13 22:21:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-13 22:21:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4159 transitions. [2022-07-13 22:21:07,775 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5251262626262626 [2022-07-13 22:21:07,775 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4159 transitions. [2022-07-13 22:21:07,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4159 transitions. [2022-07-13 22:21:07,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:07,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4159 transitions. [2022-07-13 22:21:07,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 63.015151515151516) internal successors, (4159), 66 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:07,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 120.0) internal successors, (8040), 67 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:07,786 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 120.0) internal successors, (8040), 67 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:07,786 INFO L186 Difference]: Start difference. First operand has 246 places, 286 transitions, 2961 flow. Second operand 66 states and 4159 transitions. [2022-07-13 22:21:07,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 681 transitions, 9896 flow [2022-07-13 22:21:07,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 681 transitions, 9398 flow, removed 219 selfloop flow, removed 30 redundant places. [2022-07-13 22:21:07,879 INFO L242 Difference]: Finished difference. Result has 308 places, 452 transitions, 6366 flow [2022-07-13 22:21:07,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=6366, PETRI_PLACES=308, PETRI_TRANSITIONS=452} [2022-07-13 22:21:07,880 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 201 predicate places. [2022-07-13 22:21:07,880 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 452 transitions, 6366 flow [2022-07-13 22:21:07,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:07,881 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:07,881 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 22:21:07,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 22:21:08,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:08,096 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:21:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:08,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2050011769, now seen corresponding path program 8 times [2022-07-13 22:21:08,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:08,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90607172] [2022-07-13 22:21:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:08,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:08,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:08,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90607172] [2022-07-13 22:21:08,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90607172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:08,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267080816] [2022-07-13 22:21:08,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:21:08,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:08,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:08,544 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:21:08,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:21:08,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:21:08,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:21:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 22:21:08,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:09,028 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 15 treesize of output 11 [2022-07-13 22:21:09,299 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 [2022-07-13 22:21:09,357 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 [2022-07-13 22:21:09,532 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:21:09,535 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 23 treesize of output 10 [2022-07-13 22:21:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:09,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:10,446 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:21:10,446 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 61 treesize of output 49 [2022-07-13 22:21:10,454 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-13 22:21:10,456 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 308 treesize of output 283 [2022-07-13 22:21:10,465 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 22:21:10,466 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 274 treesize of output 248 [2022-07-13 22:21:10,473 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 22:21:10,473 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 248 treesize of output 196 [2022-07-13 22:21:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:11,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267080816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:11,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:11,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 23] total 62 [2022-07-13 22:21:11,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581339648] [2022-07-13 22:21:11,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:11,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-13 22:21:11,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:11,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-13 22:21:11,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=3329, Unknown=40, NotChecked=0, Total=3782 [2022-07-13 22:21:11,152 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-07-13 22:21:11,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 452 transitions, 6366 flow. Second operand has 62 states, 62 states have (on average 53.46774193548387) internal successors, (3315), 62 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) [2022-07-13 22:21:11,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:11,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-07-13 22:21:11,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:14,453 INFO L129 PetriNetUnfolder]: 1322/6904 cut-off events. [2022-07-13 22:21:14,453 INFO L130 PetriNetUnfolder]: For 99079/99400 co-relation queries the response was YES. [2022-07-13 22:21:14,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32509 conditions, 6904 events. 1322/6904 cut-off events. For 99079/99400 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 81888 event pairs, 6 based on Foata normal form. 94/6457 useless extension candidates. Maximal degree in co-relation 32429. Up to 1269 conditions per place. [2022-07-13 22:21:14,512 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 287 selfloop transitions, 413 changer transitions 42/787 dead transitions. [2022-07-13 22:21:14,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 787 transitions, 14014 flow [2022-07-13 22:21:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 22:21:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-13 22:21:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2895 transitions. [2022-07-13 22:21:14,515 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2022-07-13 22:21:14,515 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2895 transitions. [2022-07-13 22:21:14,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2895 transitions. [2022-07-13 22:21:14,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:14,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2895 transitions. [2022-07-13 22:21:14,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 55.67307692307692) internal successors, (2895), 52 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:14,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 120.0) internal successors, (6360), 53 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:14,523 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 120.0) internal successors, (6360), 53 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:14,523 INFO L186 Difference]: Start difference. First operand has 308 places, 452 transitions, 6366 flow. Second operand 52 states and 2895 transitions. [2022-07-13 22:21:14,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 787 transitions, 14014 flow [2022-07-13 22:21:14,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 787 transitions, 12869 flow, removed 538 selfloop flow, removed 35 redundant places. [2022-07-13 22:21:14,775 INFO L242 Difference]: Finished difference. Result has 331 places, 624 transitions, 10240 flow [2022-07-13 22:21:14,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=5753, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=10240, PETRI_PLACES=331, PETRI_TRANSITIONS=624} [2022-07-13 22:21:14,776 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 224 predicate places. [2022-07-13 22:21:14,776 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 624 transitions, 10240 flow [2022-07-13 22:21:14,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 53.46774193548387) internal successors, (3315), 62 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) [2022-07-13 22:21:14,777 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:14,777 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 22:21:14,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 22:21:14,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:14,994 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:21:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:14,994 INFO L85 PathProgramCache]: Analyzing trace with hash 122552891, now seen corresponding path program 9 times [2022-07-13 22:21:14,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:14,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228025372] [2022-07-13 22:21:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:14,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:15,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:15,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228025372] [2022-07-13 22:21:15,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228025372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:15,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859956438] [2022-07-13 22:21:15,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:21:15,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:15,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:15,352 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) [2022-07-13 22:21:15,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 22:21:15,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:21:15,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:21:15,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 22:21:15,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:15,731 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:21:15,731 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 23 treesize of output 10 [2022-07-13 22:21:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:21:15,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:15,937 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:21:15,937 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 24 treesize of output 15 [2022-07-13 22:21:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:21:16,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859956438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:16,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:16,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9, 9] total 30 [2022-07-13 22:21:16,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900633949] [2022-07-13 22:21:16,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:16,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 22:21:16,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:16,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 22:21:16,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2022-07-13 22:21:16,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-13 22:21:16,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 624 transitions, 10240 flow. Second operand has 30 states, 30 states have (on average 62.5) internal successors, (1875), 30 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:16,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:16,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-13 22:21:16,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:19,010 INFO L129 PetriNetUnfolder]: 1864/9791 cut-off events. [2022-07-13 22:21:19,011 INFO L130 PetriNetUnfolder]: For 174955/175607 co-relation queries the response was YES. [2022-07-13 22:21:19,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49603 conditions, 9791 events. 1864/9791 cut-off events. For 174955/175607 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 125621 event pairs, 76 based on Foata normal form. 92/9113 useless extension candidates. Maximal degree in co-relation 49517. Up to 2413 conditions per place. [2022-07-13 22:21:19,105 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 538 selfloop transitions, 339 changer transitions 65/990 dead transitions. [2022-07-13 22:21:19,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 990 transitions, 19122 flow [2022-07-13 22:21:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-13 22:21:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-13 22:21:19,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2915 transitions. [2022-07-13 22:21:19,107 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5168439716312057 [2022-07-13 22:21:19,107 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2915 transitions. [2022-07-13 22:21:19,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2915 transitions. [2022-07-13 22:21:19,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:19,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2915 transitions. [2022-07-13 22:21:19,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 62.02127659574468) internal successors, (2915), 47 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:19,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 120.0) internal successors, (5760), 48 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:19,114 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 120.0) internal successors, (5760), 48 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:19,114 INFO L186 Difference]: Start difference. First operand has 331 places, 624 transitions, 10240 flow. Second operand 47 states and 2915 transitions. [2022-07-13 22:21:19,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 990 transitions, 19122 flow [2022-07-13 22:21:19,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 990 transitions, 18236 flow, removed 388 selfloop flow, removed 32 redundant places. [2022-07-13 22:21:19,790 INFO L242 Difference]: Finished difference. Result has 363 places, 849 transitions, 15638 flow [2022-07-13 22:21:19,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=9769, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15638, PETRI_PLACES=363, PETRI_TRANSITIONS=849} [2022-07-13 22:21:19,791 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 256 predicate places. [2022-07-13 22:21:19,791 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 849 transitions, 15638 flow [2022-07-13 22:21:19,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 62.5) internal successors, (1875), 30 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:19,791 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:19,791 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 22:21:19,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 22:21:20,008 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,SelfDestructingSolverStorable12 [2022-07-13 22:21:20,010 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:21:20,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:20,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1652157435, now seen corresponding path program 10 times [2022-07-13 22:21:20,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:20,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372822848] [2022-07-13 22:21:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:20,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:20,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:20,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372822848] [2022-07-13 22:21:20,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372822848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:20,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666063772] [2022-07-13 22:21:20,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:21:20,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:20,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:20,364 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) [2022-07-13 22:21:20,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 22:21:20,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:21:20,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:21:20,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 22:21:20,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:20,928 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:21:20,928 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 23 treesize of output 10 [2022-07-13 22:21:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:20,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:20,992 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-13 22:21:20,992 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 25 treesize of output 17 [2022-07-13 22:21:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:21,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666063772] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:21,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:21,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 45 [2022-07-13 22:21:21,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635616163] [2022-07-13 22:21:21,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:21,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-13 22:21:21,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:21,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-13 22:21:21,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 22:21:21,398 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-13 22:21:21,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 849 transitions, 15638 flow. Second operand has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:21,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:21,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-13 22:21:21,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:28,270 INFO L129 PetriNetUnfolder]: 3300/16834 cut-off events. [2022-07-13 22:21:28,270 INFO L130 PetriNetUnfolder]: For 465858/466988 co-relation queries the response was YES. [2022-07-13 22:21:28,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101923 conditions, 16834 events. 3300/16834 cut-off events. For 465858/466988 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 231849 event pairs, 12 based on Foata normal form. 308/15862 useless extension candidates. Maximal degree in co-relation 101821. Up to 2711 conditions per place. [2022-07-13 22:21:28,472 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 621 selfloop transitions, 877 changer transitions 114/1660 dead transitions. [2022-07-13 22:21:28,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1660 transitions, 37553 flow [2022-07-13 22:21:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-13 22:21:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-13 22:21:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4404 transitions. [2022-07-13 22:21:28,476 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5242857142857142 [2022-07-13 22:21:28,476 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4404 transitions. [2022-07-13 22:21:28,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4404 transitions. [2022-07-13 22:21:28,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:28,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4404 transitions. [2022-07-13 22:21:28,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 62.91428571428571) internal successors, (4404), 70 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:28,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 120.0) internal successors, (8520), 71 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:28,487 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 120.0) internal successors, (8520), 71 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:28,487 INFO L186 Difference]: Start difference. First operand has 363 places, 849 transitions, 15638 flow. Second operand 70 states and 4404 transitions. [2022-07-13 22:21:28,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1660 transitions, 37553 flow [2022-07-13 22:21:30,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1660 transitions, 36524 flow, removed 487 selfloop flow, removed 27 redundant places. [2022-07-13 22:21:30,588 INFO L242 Difference]: Finished difference. Result has 430 places, 1244 transitions, 27398 flow [2022-07-13 22:21:30,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=15291, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=27398, PETRI_PLACES=430, PETRI_TRANSITIONS=1244} [2022-07-13 22:21:30,590 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 323 predicate places. [2022-07-13 22:21:30,590 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1244 transitions, 27398 flow [2022-07-13 22:21:30,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:30,590 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:30,591 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 22:21:30,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-13 22:21:30,792 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,SelfDestructingSolverStorable13 [2022-07-13 22:21:30,792 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:21:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:30,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1495727277, now seen corresponding path program 11 times [2022-07-13 22:21:30,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:30,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358528389] [2022-07-13 22:21:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:30,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:31,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:31,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358528389] [2022-07-13 22:21:31,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358528389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:31,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65915938] [2022-07-13 22:21:31,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:21:31,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:31,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:31,257 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) [2022-07-13 22:21:31,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 22:21:31,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:21:31,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:21:31,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 22:21:31,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:31,375 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 [2022-07-13 22:21:31,448 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:21:31,449 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 [2022-07-13 22:21:31,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:21:31,910 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:21:31,911 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 23 treesize of output 10 [2022-07-13 22:21:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:21:31,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:32,004 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_342 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_342) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-07-13 22:21:32,018 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:21:32,018 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 44 treesize of output 44 [2022-07-13 22:21:32,021 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 14 treesize of output 7 [2022-07-13 22:21:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:21:32,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65915938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:32,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:32,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 16] total 39 [2022-07-13 22:21:32,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762174783] [2022-07-13 22:21:32,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:32,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 22:21:32,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:32,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 22:21:32,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1304, Unknown=1, NotChecked=72, Total=1482 [2022-07-13 22:21:32,493 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 120 [2022-07-13 22:21:32,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1244 transitions, 27398 flow. Second operand has 39 states, 39 states have (on average 53.282051282051285) internal successors, (2078), 39 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:32,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:32,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 120 [2022-07-13 22:21:32,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:39,990 INFO L129 PetriNetUnfolder]: 3683/18623 cut-off events. [2022-07-13 22:21:39,991 INFO L130 PetriNetUnfolder]: For 574379/575886 co-relation queries the response was YES. [2022-07-13 22:21:40,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119929 conditions, 18623 events. 3683/18623 cut-off events. For 574379/575886 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 261848 event pairs, 289 based on Foata normal form. 187/17340 useless extension candidates. Maximal degree in co-relation 119798. Up to 6830 conditions per place. [2022-07-13 22:21:40,251 INFO L132 encePairwiseOnDemand]: 93/120 looper letters, 1172 selfloop transitions, 262 changer transitions 30/1507 dead transitions. [2022-07-13 22:21:40,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1507 transitions, 36498 flow [2022-07-13 22:21:40,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 22:21:40,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-13 22:21:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2059 transitions. [2022-07-13 22:21:40,253 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45153508771929823 [2022-07-13 22:21:40,253 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2059 transitions. [2022-07-13 22:21:40,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2059 transitions. [2022-07-13 22:21:40,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:40,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2059 transitions. [2022-07-13 22:21:40,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 54.18421052631579) internal successors, (2059), 38 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) [2022-07-13 22:21:40,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:40,259 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:40,259 INFO L186 Difference]: Start difference. First operand has 430 places, 1244 transitions, 27398 flow. Second operand 38 states and 2059 transitions. [2022-07-13 22:21:40,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1507 transitions, 36498 flow [2022-07-13 22:21:42,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1507 transitions, 35356 flow, removed 509 selfloop flow, removed 38 redundant places. [2022-07-13 22:21:42,665 INFO L242 Difference]: Finished difference. Result has 425 places, 1369 transitions, 30467 flow [2022-07-13 22:21:42,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=26475, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=984, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=30467, PETRI_PLACES=425, PETRI_TRANSITIONS=1369} [2022-07-13 22:21:42,667 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 318 predicate places. [2022-07-13 22:21:42,667 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 1369 transitions, 30467 flow [2022-07-13 22:21:42,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 53.282051282051285) internal successors, (2078), 39 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:42,667 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:42,668 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2022-07-13 22:21:42,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 22:21:42,883 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,SelfDestructingSolverStorable14 [2022-07-13 22:21:42,884 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:21:42,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:42,884 INFO L85 PathProgramCache]: Analyzing trace with hash 730214897, now seen corresponding path program 12 times [2022-07-13 22:21:42,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:42,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646675701] [2022-07-13 22:21:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:42,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 22:21:42,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:42,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646675701] [2022-07-13 22:21:42,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646675701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:42,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58643429] [2022-07-13 22:21:42,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:21:42,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:42,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:43,008 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) [2022-07-13 22:21:43,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 22:21:43,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 22:21:43,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:21:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 22:21:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 22:21:43,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 22:21:43,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58643429] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:43,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:43,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-07-13 22:21:43,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962539182] [2022-07-13 22:21:43,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:43,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 22:21:43,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:43,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 22:21:43,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-07-13 22:21:43,496 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-13 22:21:43,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 1369 transitions, 30467 flow. Second operand has 29 states, 29 states have (on average 92.3103448275862) internal successors, (2677), 29 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:43,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:43,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-13 22:21:43,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:45,306 INFO L129 PetriNetUnfolder]: 827/5656 cut-off events. [2022-07-13 22:21:45,307 INFO L130 PetriNetUnfolder]: For 163954/164737 co-relation queries the response was YES. [2022-07-13 22:21:45,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32221 conditions, 5656 events. 827/5656 cut-off events. For 163954/164737 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 68952 event pairs, 84 based on Foata normal form. 157/5287 useless extension candidates. Maximal degree in co-relation 32094. Up to 1241 conditions per place. [2022-07-13 22:21:45,393 INFO L132 encePairwiseOnDemand]: 109/120 looper letters, 396 selfloop transitions, 23 changer transitions 19/550 dead transitions. [2022-07-13 22:21:45,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 550 transitions, 11756 flow [2022-07-13 22:21:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:21:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:21:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1493 transitions. [2022-07-13 22:21:45,395 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7776041666666667 [2022-07-13 22:21:45,395 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1493 transitions. [2022-07-13 22:21:45,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1493 transitions. [2022-07-13 22:21:45,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:45,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1493 transitions. [2022-07-13 22:21:45,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 93.3125) internal successors, (1493), 16 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:45,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 120.0) internal successors, (2040), 17 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:45,398 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 120.0) internal successors, (2040), 17 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:45,398 INFO L186 Difference]: Start difference. First operand has 425 places, 1369 transitions, 30467 flow. Second operand 16 states and 1493 transitions. [2022-07-13 22:21:45,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 550 transitions, 11756 flow [2022-07-13 22:21:45,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 550 transitions, 10827 flow, removed 260 selfloop flow, removed 64 redundant places. [2022-07-13 22:21:45,933 INFO L242 Difference]: Finished difference. Result has 345 places, 517 transitions, 9316 flow [2022-07-13 22:21:45,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=9536, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9316, PETRI_PLACES=345, PETRI_TRANSITIONS=517} [2022-07-13 22:21:45,933 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 238 predicate places. [2022-07-13 22:21:45,934 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 517 transitions, 9316 flow [2022-07-13 22:21:45,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 92.3103448275862) internal successors, (2677), 29 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:45,934 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:45,934 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2022-07-13 22:21:45,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 22:21:46,151 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,SelfDestructingSolverStorable15 [2022-07-13 22:21:46,151 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:21:46,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:46,151 INFO L85 PathProgramCache]: Analyzing trace with hash -87345653, now seen corresponding path program 13 times [2022-07-13 22:21:46,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:46,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149541538] [2022-07-13 22:21:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:46,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:21:46,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:46,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149541538] [2022-07-13 22:21:46,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149541538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:46,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943529079] [2022-07-13 22:21:46,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:21:46,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:46,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:46,252 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) [2022-07-13 22:21:46,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 22:21:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:46,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 22:21:46,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:46,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:46,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943529079] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:46,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:46,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 14] total 29 [2022-07-13 22:21:46,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540179212] [2022-07-13 22:21:46,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:46,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 22:21:46,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:46,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 22:21:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-07-13 22:21:46,927 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-07-13 22:21:46,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 517 transitions, 9316 flow. Second operand has 29 states, 29 states have (on average 90.72413793103448) internal successors, (2631), 29 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:46,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:46,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-07-13 22:21:46,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:48,744 INFO L129 PetriNetUnfolder]: 796/6156 cut-off events. [2022-07-13 22:21:48,744 INFO L130 PetriNetUnfolder]: For 143453/144327 co-relation queries the response was YES. [2022-07-13 22:21:48,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31740 conditions, 6156 events. 796/6156 cut-off events. For 143453/144327 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 77082 event pairs, 85 based on Foata normal form. 378/5979 useless extension candidates. Maximal degree in co-relation 31641. Up to 888 conditions per place. [2022-07-13 22:21:48,797 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 164 selfloop transitions, 189 changer transitions 115/559 dead transitions. [2022-07-13 22:21:48,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 559 transitions, 11473 flow [2022-07-13 22:21:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 22:21:48,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-13 22:21:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2276 transitions. [2022-07-13 22:21:48,800 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7586666666666667 [2022-07-13 22:21:48,800 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2276 transitions. [2022-07-13 22:21:48,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2276 transitions. [2022-07-13 22:21:48,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:48,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2276 transitions. [2022-07-13 22:21:48,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 91.04) internal successors, (2276), 25 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:48,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 120.0) internal successors, (3120), 26 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:48,806 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 120.0) internal successors, (3120), 26 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:48,806 INFO L186 Difference]: Start difference. First operand has 345 places, 517 transitions, 9316 flow. Second operand 25 states and 2276 transitions. [2022-07-13 22:21:48,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 559 transitions, 11473 flow [2022-07-13 22:21:49,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 559 transitions, 11234 flow, removed 49 selfloop flow, removed 22 redundant places. [2022-07-13 22:21:49,176 INFO L242 Difference]: Finished difference. Result has 346 places, 424 transitions, 8648 flow [2022-07-13 22:21:49,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=7876, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8648, PETRI_PLACES=346, PETRI_TRANSITIONS=424} [2022-07-13 22:21:49,177 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 239 predicate places. [2022-07-13 22:21:49,177 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 424 transitions, 8648 flow [2022-07-13 22:21:49,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.72413793103448) internal successors, (2631), 29 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:49,178 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:49,178 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 22:21:49,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 22:21:49,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 22:21:49,394 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:21:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash -78433764, now seen corresponding path program 14 times [2022-07-13 22:21:49,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:49,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647335252] [2022-07-13 22:21:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:50,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647335252] [2022-07-13 22:21:50,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647335252] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602079679] [2022-07-13 22:21:50,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:21:50,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:50,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:50,165 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:21:50,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 22:21:50,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:21:50,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:21:50,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 22:21:50,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:51,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:21:51,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-13 22:21:51,216 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 22:21:51,217 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 24 treesize of output 10 [2022-07-13 22:21:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:51,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:51,310 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_431 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_431) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2022-07-13 22:21:51,386 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:21:51,387 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 42 treesize of output 42 [2022-07-13 22:21:51,389 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 13 treesize of output 7 [2022-07-13 22:21:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:52,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602079679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:52,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:52,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2022-07-13 22:21:52,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309951260] [2022-07-13 22:21:52,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:52,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-13 22:21:52,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:52,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-13 22:21:52,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=3486, Unknown=7, NotChecked=120, Total=3906 [2022-07-13 22:21:52,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 120 [2022-07-13 22:21:52,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 424 transitions, 8648 flow. Second operand has 63 states, 63 states have (on average 55.523809523809526) internal successors, (3498), 63 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:52,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:52,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 120 [2022-07-13 22:21:52,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:58,100 INFO L129 PetriNetUnfolder]: 1595/10117 cut-off events. [2022-07-13 22:21:58,100 INFO L130 PetriNetUnfolder]: For 258183/258915 co-relation queries the response was YES. [2022-07-13 22:21:58,170 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58801 conditions, 10117 events. 1595/10117 cut-off events. For 258183/258915 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 136960 event pairs, 80 based on Foata normal form. 198/9454 useless extension candidates. Maximal degree in co-relation 58704. Up to 2097 conditions per place. [2022-07-13 22:21:58,202 INFO L132 encePairwiseOnDemand]: 92/120 looper letters, 459 selfloop transitions, 368 changer transitions 75/947 dead transitions. [2022-07-13 22:21:58,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 947 transitions, 23371 flow [2022-07-13 22:21:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-13 22:21:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-13 22:21:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3428 transitions. [2022-07-13 22:21:58,205 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4761111111111111 [2022-07-13 22:21:58,205 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3428 transitions. [2022-07-13 22:21:58,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3428 transitions. [2022-07-13 22:21:58,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:58,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3428 transitions. [2022-07-13 22:21:58,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.13333333333333) internal successors, (3428), 60 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:58,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:58,212 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:58,212 INFO L186 Difference]: Start difference. First operand has 346 places, 424 transitions, 8648 flow. Second operand 60 states and 3428 transitions. [2022-07-13 22:21:58,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 947 transitions, 23371 flow [2022-07-13 22:21:59,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 947 transitions, 21425 flow, removed 908 selfloop flow, removed 46 redundant places. [2022-07-13 22:21:59,094 INFO L242 Difference]: Finished difference. Result has 347 places, 738 transitions, 17704 flow [2022-07-13 22:21:59,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=8165, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=17704, PETRI_PLACES=347, PETRI_TRANSITIONS=738} [2022-07-13 22:21:59,095 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 240 predicate places. [2022-07-13 22:21:59,095 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 738 transitions, 17704 flow [2022-07-13 22:21:59,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 55.523809523809526) internal successors, (3498), 63 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:59,095 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:59,095 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 22:21:59,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-13 22:21:59,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 22:21:59,314 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:21:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash -102659002, now seen corresponding path program 15 times [2022-07-13 22:21:59,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:59,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747187236] [2022-07-13 22:21:59,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:59,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:00,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:00,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747187236] [2022-07-13 22:22:00,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747187236] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:00,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746661367] [2022-07-13 22:22:00,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:22:00,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:00,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:00,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:22:00,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 22:22:00,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:22:00,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:00,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 22:22:00,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:00,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:22:00,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:22:00,545 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 [2022-07-13 22:22:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 22:22:00,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:00,577 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_464 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_464) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-13 22:22:00,592 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:22:00,593 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 42 treesize of output 42 [2022-07-13 22:22:00,595 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 13 treesize of output 7 [2022-07-13 22:22:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 4 not checked. [2022-07-13 22:22:00,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746661367] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:00,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:00,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 41 [2022-07-13 22:22:00,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459563456] [2022-07-13 22:22:00,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:00,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 22:22:00,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:00,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 22:22:00,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1451, Unknown=1, NotChecked=76, Total=1640 [2022-07-13 22:22:00,894 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 120 [2022-07-13 22:22:00,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 738 transitions, 17704 flow. Second operand has 41 states, 41 states have (on average 56.390243902439025) internal successors, (2312), 41 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:00,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:00,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 120 [2022-07-13 22:22:00,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:05,289 INFO L129 PetriNetUnfolder]: 1596/9925 cut-off events. [2022-07-13 22:22:05,290 INFO L130 PetriNetUnfolder]: For 228129/229163 co-relation queries the response was YES. [2022-07-13 22:22:05,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55756 conditions, 9925 events. 1596/9925 cut-off events. For 228129/229163 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 133271 event pairs, 156 based on Foata normal form. 206/9292 useless extension candidates. Maximal degree in co-relation 55648. Up to 3464 conditions per place. [2022-07-13 22:22:05,402 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 600 selfloop transitions, 192 changer transitions 23/860 dead transitions. [2022-07-13 22:22:05,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 860 transitions, 22147 flow [2022-07-13 22:22:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-13 22:22:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-13 22:22:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2431 transitions. [2022-07-13 22:22:05,405 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.47112403100775196 [2022-07-13 22:22:05,405 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2431 transitions. [2022-07-13 22:22:05,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2431 transitions. [2022-07-13 22:22:05,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:05,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2431 transitions. [2022-07-13 22:22:05,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 56.53488372093023) internal successors, (2431), 43 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:05,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:05,411 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:05,411 INFO L186 Difference]: Start difference. First operand has 347 places, 738 transitions, 17704 flow. Second operand 43 states and 2431 transitions. [2022-07-13 22:22:05,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 860 transitions, 22147 flow [2022-07-13 22:22:06,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 860 transitions, 21256 flow, removed 422 selfloop flow, removed 30 redundant places. [2022-07-13 22:22:06,136 INFO L242 Difference]: Finished difference. Result has 355 places, 806 transitions, 19492 flow [2022-07-13 22:22:06,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=16875, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=19492, PETRI_PLACES=355, PETRI_TRANSITIONS=806} [2022-07-13 22:22:06,137 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 248 predicate places. [2022-07-13 22:22:06,138 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 806 transitions, 19492 flow [2022-07-13 22:22:06,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.390243902439025) internal successors, (2312), 41 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:06,138 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:06,138 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:22:06,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 22:22:06,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:06,365 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1102779316, now seen corresponding path program 16 times [2022-07-13 22:22:06,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:06,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451969028] [2022-07-13 22:22:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:06,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:07,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:07,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451969028] [2022-07-13 22:22:07,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451969028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:07,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386544888] [2022-07-13 22:22:07,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:22:07,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:07,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:07,048 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:22:07,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 22:22:07,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:22:07,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:07,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-13 22:22:07,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:07,138 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 [2022-07-13 22:22:07,291 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:22:07,291 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 [2022-07-13 22:22:08,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:22:08,171 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 15 treesize of output 7 [2022-07-13 22:22:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:08,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:08,402 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:22:08,402 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 42 treesize of output 42 [2022-07-13 22:22:08,405 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 13 treesize of output 7 [2022-07-13 22:22:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:09,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386544888] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:09,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:09,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 68 [2022-07-13 22:22:09,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825284935] [2022-07-13 22:22:09,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:09,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-13 22:22:09,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-13 22:22:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=4133, Unknown=0, NotChecked=0, Total=4556 [2022-07-13 22:22:09,500 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-13 22:22:09,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 806 transitions, 19492 flow. Second operand has 68 states, 68 states have (on average 51.5) internal successors, (3502), 68 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:09,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:09,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-13 22:22:09,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:18,873 INFO L129 PetriNetUnfolder]: 2723/16382 cut-off events. [2022-07-13 22:22:18,873 INFO L130 PetriNetUnfolder]: For 377159/378448 co-relation queries the response was YES. [2022-07-13 22:22:19,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90372 conditions, 16382 events. 2723/16382 cut-off events. For 377159/378448 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 238058 event pairs, 121 based on Foata normal form. 461/15466 useless extension candidates. Maximal degree in co-relation 90268. Up to 2713 conditions per place. [2022-07-13 22:22:19,059 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 734 selfloop transitions, 616 changer transitions 103/1495 dead transitions. [2022-07-13 22:22:19,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1495 transitions, 38525 flow [2022-07-13 22:22:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-13 22:22:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-13 22:22:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4301 transitions. [2022-07-13 22:22:19,062 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44248971193415637 [2022-07-13 22:22:19,062 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4301 transitions. [2022-07-13 22:22:19,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4301 transitions. [2022-07-13 22:22:19,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:19,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4301 transitions. [2022-07-13 22:22:19,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 53.098765432098766) internal successors, (4301), 81 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:19,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 120.0) internal successors, (9840), 82 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:19,071 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 120.0) internal successors, (9840), 82 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:19,072 INFO L186 Difference]: Start difference. First operand has 355 places, 806 transitions, 19492 flow. Second operand 81 states and 4301 transitions. [2022-07-13 22:22:19,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1495 transitions, 38525 flow [2022-07-13 22:22:20,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1495 transitions, 38150 flow, removed 148 selfloop flow, removed 30 redundant places. [2022-07-13 22:22:20,365 INFO L242 Difference]: Finished difference. Result has 447 places, 1087 transitions, 29578 flow [2022-07-13 22:22:20,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=19279, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=29578, PETRI_PLACES=447, PETRI_TRANSITIONS=1087} [2022-07-13 22:22:20,367 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 340 predicate places. [2022-07-13 22:22:20,367 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 1087 transitions, 29578 flow [2022-07-13 22:22:20,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 51.5) internal successors, (3502), 68 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:20,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:20,368 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 22:22:20,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-13 22:22:20,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:20,584 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash 458708590, now seen corresponding path program 17 times [2022-07-13 22:22:20,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:20,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502476889] [2022-07-13 22:22:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:20,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:21,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:21,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502476889] [2022-07-13 22:22:21,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502476889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:21,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352843112] [2022-07-13 22:22:21,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:22:21,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:21,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:21,256 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:22:21,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 22:22:21,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 22:22:21,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 22:22:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:21,347 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 [2022-07-13 22:22:21,429 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:22:21,429 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 [2022-07-13 22:22:21,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-13 22:22:21,781 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 [2022-07-13 22:22:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 22:22:21,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:21,821 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_532 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_532) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-07-13 22:22:21,833 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:22:21,834 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 44 treesize of output 44 [2022-07-13 22:22:21,836 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 14 treesize of output 7 [2022-07-13 22:22:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 22:22:22,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352843112] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:22,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:22,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 16] total 43 [2022-07-13 22:22:22,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769062455] [2022-07-13 22:22:22,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:22,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-13 22:22:22,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:22,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-13 22:22:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1605, Unknown=1, NotChecked=80, Total=1806 [2022-07-13 22:22:22,179 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-13 22:22:22,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1087 transitions, 29578 flow. Second operand has 43 states, 43 states have (on average 52.2093023255814) internal successors, (2245), 43 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:22,181 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:22,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-13 22:22:22,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:31,567 INFO L129 PetriNetUnfolder]: 3628/21792 cut-off events. [2022-07-13 22:22:31,567 INFO L130 PetriNetUnfolder]: For 670482/672384 co-relation queries the response was YES. [2022-07-13 22:22:31,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134037 conditions, 21792 events. 3628/21792 cut-off events. For 670482/672384 co-relation queries the response was YES. Maximal size of possible extension queue 1393. Compared 330613 event pairs, 119 based on Foata normal form. 561/20544 useless extension candidates. Maximal degree in co-relation 133890. Up to 3788 conditions per place. [2022-07-13 22:22:31,884 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 996 selfloop transitions, 635 changer transitions 76/1749 dead transitions. [2022-07-13 22:22:31,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1749 transitions, 49876 flow [2022-07-13 22:22:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-13 22:22:31,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-13 22:22:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3172 transitions. [2022-07-13 22:22:31,889 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44055555555555553 [2022-07-13 22:22:31,889 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3172 transitions. [2022-07-13 22:22:31,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3172 transitions. [2022-07-13 22:22:31,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:31,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3172 transitions. [2022-07-13 22:22:31,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 52.86666666666667) internal successors, (3172), 60 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:31,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:31,896 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:31,896 INFO L186 Difference]: Start difference. First operand has 447 places, 1087 transitions, 29578 flow. Second operand 60 states and 3172 transitions. [2022-07-13 22:22:31,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1749 transitions, 49876 flow [2022-07-13 22:22:34,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1749 transitions, 47648 flow, removed 1069 selfloop flow, removed 55 redundant places. [2022-07-13 22:22:34,752 INFO L242 Difference]: Finished difference. Result has 454 places, 1336 transitions, 38424 flow [2022-07-13 22:22:34,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=28350, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=38424, PETRI_PLACES=454, PETRI_TRANSITIONS=1336} [2022-07-13 22:22:34,753 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 347 predicate places. [2022-07-13 22:22:34,753 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1336 transitions, 38424 flow [2022-07-13 22:22:34,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 52.2093023255814) internal successors, (2245), 43 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:34,754 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:34,754 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 22:22:34,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-13 22:22:34,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:34,970 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:34,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:34,971 INFO L85 PathProgramCache]: Analyzing trace with hash -326418292, now seen corresponding path program 18 times [2022-07-13 22:22:34,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:34,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708707781] [2022-07-13 22:22:34,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:34,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:35,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708707781] [2022-07-13 22:22:35,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708707781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:35,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814794828] [2022-07-13 22:22:35,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:22:35,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:35,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:35,402 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:22:35,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 22:22:35,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 22:22:35,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:35,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 22:22:35,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:36,311 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:22:36,311 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 23 treesize of output 10 [2022-07-13 22:22:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:36,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:36,401 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-13 22:22:36,401 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 25 treesize of output 17 [2022-07-13 22:22:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:37,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814794828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:37,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:37,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 54 [2022-07-13 22:22:37,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099550342] [2022-07-13 22:22:37,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:37,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-13 22:22:37,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-13 22:22:37,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2523, Unknown=0, NotChecked=0, Total=2862 [2022-07-13 22:22:37,070 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-13 22:22:37,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1336 transitions, 38424 flow. Second operand has 54 states, 54 states have (on average 61.0) internal successors, (3294), 54 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:37,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:37,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-13 22:22:37,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:54,852 INFO L129 PetriNetUnfolder]: 5955/33390 cut-off events. [2022-07-13 22:22:54,852 INFO L130 PetriNetUnfolder]: For 1177332/1181149 co-relation queries the response was YES. [2022-07-13 22:22:55,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 216541 conditions, 33390 events. 5955/33390 cut-off events. For 1177332/1181149 co-relation queries the response was YES. Maximal size of possible extension queue 2052. Compared 530905 event pairs, 207 based on Foata normal form. 863/31536 useless extension candidates. Maximal degree in co-relation 216391. Up to 6066 conditions per place.