./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-two-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-two-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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:21:17,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:21:17,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:21:17,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:21:17,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:21:17,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:21:17,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:21:17,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:21:17,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:21:17,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:21:17,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:21:17,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:21:17,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:21:17,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:21:17,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:21:17,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:21:17,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:21:17,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:21:17,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:21:17,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:21:17,605 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:21:17,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:21:17,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:21:17,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:21:17,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:21:17,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:21:17,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:21:17,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:21:17,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:21:17,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:21:17,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:21:17,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:21:17,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:21:17,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:21:17,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:21:17,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:21:17,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:21:17,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:21:17,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:21:17,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:21:17,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:21:17,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:21:17,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:21:17,644 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:21:17,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:21:17,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:21:17,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:21:17,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:21:17,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:21:17,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:21:17,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:21:17,647 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:21:17,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:21:17,648 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:21:17,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:21:17,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:21:17,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:21:17,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:21:17,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:21:17,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:21:17,649 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:21:17,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:21:17,650 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:21:17,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:21:17,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:21:17,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:21:17,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:21:17,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:21:17,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:21:17,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:21:17,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:21:17,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:21:17,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:21:17,652 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:21:17,652 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:21:17,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:21:17,652 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2022-07-13 22:21:17,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:21:17,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:21:17,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:21:17,894 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:21:17,895 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:21:17,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-07-13 22:21:17,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e93b21dd/6ba0f0ec2df84acf8fcd81a7666fedce/FLAG650be4cc3 [2022-07-13 22:21:18,258 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:21:18,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-07-13 22:21:18,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e93b21dd/6ba0f0ec2df84acf8fcd81a7666fedce/FLAG650be4cc3 [2022-07-13 22:21:18,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e93b21dd/6ba0f0ec2df84acf8fcd81a7666fedce [2022-07-13 22:21:18,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:21:18,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:21:18,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:21:18,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:21:18,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:21:18,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d64b357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18, skipping insertion in model container [2022-07-13 22:21:18,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:21:18,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:21:18,834 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-two-queue.wvr.c[2987,3000] [2022-07-13 22:21:18,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:21:18,843 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:21:18,856 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-two-queue.wvr.c[2987,3000] [2022-07-13 22:21:18,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:21:18,867 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:21:18,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18 WrapperNode [2022-07-13 22:21:18,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:21:18,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:21:18,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:21:18,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:21:18,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,894 INFO L137 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 200 [2022-07-13 22:21:18,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:21:18,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:21:18,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:21:18,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:21:18,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:21:18,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:21:18,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:21:18,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:21:18,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18" (1/1) ... [2022-07-13 22:21:18,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:21:18,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:18,946 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 22:21:18,968 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 22:21:18,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:21:18,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:21:18,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:21:18,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:21:18,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:21:18,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:21:18,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:21:18,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:21:18,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:21:18,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:21:18,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:21:18,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:21:18,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:21:18,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:21:18,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:21:18,997 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 22:21:19,089 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:21:19,104 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:21:19,361 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:21:19,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:21:19,471 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 22:21:19,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:21:19 BoogieIcfgContainer [2022-07-13 22:21:19,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:21:19,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:21:19,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:21:19,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:21:19,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:21:18" (1/3) ... [2022-07-13 22:21:19,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224faff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:21:19, skipping insertion in model container [2022-07-13 22:21:19,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:21:18" (2/3) ... [2022-07-13 22:21:19,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224faff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:21:19, skipping insertion in model container [2022-07-13 22:21:19,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:21:19" (3/3) ... [2022-07-13 22:21:19,481 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2022-07-13 22:21:19,485 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:21:19,491 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:21:19,491 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:21:19,491 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:21:19,538 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:21:19,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 172 places, 178 transitions, 372 flow [2022-07-13 22:21:19,641 INFO L129 PetriNetUnfolder]: 13/176 cut-off events. [2022-07-13 22:21:19,641 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:21:19,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 13/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2022-07-13 22:21:19,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 178 transitions, 372 flow [2022-07-13 22:21:19,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 167 transitions, 346 flow [2022-07-13 22:21:19,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:21:19,658 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@3946004a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@429ab394 [2022-07-13 22:21:19,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:21:19,682 INFO L129 PetriNetUnfolder]: 13/166 cut-off events. [2022-07-13 22:21:19,683 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:21:19,683 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:19,690 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:21:19,692 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 22:21:19,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:19,696 INFO L85 PathProgramCache]: Analyzing trace with hash -174858074, now seen corresponding path program 1 times [2022-07-13 22:21:19,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:19,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874953643] [2022-07-13 22:21:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:19,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:19,935 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 22:21:19,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:19,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874953643] [2022-07-13 22:21:19,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874953643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:21:19,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:21:19,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:21:19,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166935253] [2022-07-13 22:21:19,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:21:19,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:21:19,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:21:19,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:21:19,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 178 [2022-07-13 22:21:19,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 167 transitions, 346 flow. Second operand has 2 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 22:21:19,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:19,980 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 178 [2022-07-13 22:21:19,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:20,048 INFO L129 PetriNetUnfolder]: 17/189 cut-off events. [2022-07-13 22:21:20,049 INFO L130 PetriNetUnfolder]: For 17/20 co-relation queries the response was YES. [2022-07-13 22:21:20,050 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 189 events. 17/189 cut-off events. For 17/20 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 196 event pairs, 8 based on Foata normal form. 15/191 useless extension candidates. Maximal degree in co-relation 137. Up to 25 conditions per place. [2022-07-13 22:21:20,052 INFO L132 encePairwiseOnDemand]: 169/178 looper letters, 8 selfloop transitions, 0 changer transitions 5/158 dead transitions. [2022-07-13 22:21:20,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 158 transitions, 344 flow [2022-07-13 22:21:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:21:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:21:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 337 transitions. [2022-07-13 22:21:20,067 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9466292134831461 [2022-07-13 22:21:20,067 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 337 transitions. [2022-07-13 22:21:20,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 337 transitions. [2022-07-13 22:21:20,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:20,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 337 transitions. [2022-07-13 22:21:20,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 168.5) internal successors, (337), 2 states have internal predecessors, (337), 0 states have call successors, (0), 0 states 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 22:21:20,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 22:21:20,084 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 22:21:20,085 INFO L186 Difference]: Start difference. First operand has 161 places, 167 transitions, 346 flow. Second operand 2 states and 337 transitions. [2022-07-13 22:21:20,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 158 transitions, 344 flow [2022-07-13 22:21:20,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 158 transitions, 336 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:21:20,094 INFO L242 Difference]: Finished difference. Result has 158 places, 153 transitions, 310 flow [2022-07-13 22:21:20,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=158, PETRI_TRANSITIONS=153} [2022-07-13 22:21:20,101 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, -3 predicate places. [2022-07-13 22:21:20,102 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 153 transitions, 310 flow [2022-07-13 22:21:20,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 22:21:20,103 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:20,103 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:21:20,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:21:20,104 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 22:21:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1666625947, now seen corresponding path program 1 times [2022-07-13 22:21:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:20,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994528936] [2022-07-13 22:21:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:20,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:20,335 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 22:21:20,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994528936] [2022-07-13 22:21:20,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994528936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:21:20,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:21:20,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:21:20,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234183927] [2022-07-13 22:21:20,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:21:20,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:21:20,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:20,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:21:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:21:20,339 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 178 [2022-07-13 22:21:20,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 153 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 22:21:20,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:20,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 178 [2022-07-13 22:21:20,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:20,508 INFO L129 PetriNetUnfolder]: 112/418 cut-off events. [2022-07-13 22:21:20,508 INFO L130 PetriNetUnfolder]: For 20/33 co-relation queries the response was YES. [2022-07-13 22:21:20,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 418 events. 112/418 cut-off events. For 20/33 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1477 event pairs, 33 based on Foata normal form. 3/374 useless extension candidates. Maximal degree in co-relation 673. Up to 120 conditions per place. [2022-07-13 22:21:20,512 INFO L132 encePairwiseOnDemand]: 171/178 looper letters, 59 selfloop transitions, 5 changer transitions 4/183 dead transitions. [2022-07-13 22:21:20,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 183 transitions, 511 flow [2022-07-13 22:21:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:21:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:21:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 819 transitions. [2022-07-13 22:21:20,515 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7668539325842697 [2022-07-13 22:21:20,515 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 819 transitions. [2022-07-13 22:21:20,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 819 transitions. [2022-07-13 22:21:20,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:20,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 819 transitions. [2022-07-13 22:21:20,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.5) internal successors, (819), 6 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 22:21:20,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states 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 22:21:20,521 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states 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 22:21:20,521 INFO L186 Difference]: Start difference. First operand has 158 places, 153 transitions, 310 flow. Second operand 6 states and 819 transitions. [2022-07-13 22:21:20,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 183 transitions, 511 flow [2022-07-13 22:21:20,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 183 transitions, 511 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:21:20,527 INFO L242 Difference]: Finished difference. Result has 161 places, 156 transitions, 339 flow [2022-07-13 22:21:20,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=161, PETRI_TRANSITIONS=156} [2022-07-13 22:21:20,529 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2022-07-13 22:21:20,529 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 156 transitions, 339 flow [2022-07-13 22:21:20,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 22:21:20,530 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:20,530 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:20,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:21:20,531 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 22:21:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:20,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1017288057, now seen corresponding path program 1 times [2022-07-13 22:21:20,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:20,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917038373] [2022-07-13 22:21:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:20,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:20,666 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 22:21:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:20,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917038373] [2022-07-13 22:21:20,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917038373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:21:20,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:21:20,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:21:20,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800945391] [2022-07-13 22:21:20,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:21:20,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:21:20,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:20,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:21:20,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:21:20,677 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2022-07-13 22:21:20,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 156 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states 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 22:21:20,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:20,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2022-07-13 22:21:20,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:20,796 INFO L129 PetriNetUnfolder]: 109/423 cut-off events. [2022-07-13 22:21:20,796 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-07-13 22:21:20,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 423 events. 109/423 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1573 event pairs, 48 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 706. Up to 117 conditions per place. [2022-07-13 22:21:20,799 INFO L132 encePairwiseOnDemand]: 168/178 looper letters, 37 selfloop transitions, 11 changer transitions 4/184 dead transitions. [2022-07-13 22:21:20,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 184 transitions, 515 flow [2022-07-13 22:21:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:21:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:21:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2022-07-13 22:21:20,801 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8865168539325843 [2022-07-13 22:21:20,801 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2022-07-13 22:21:20,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2022-07-13 22:21:20,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:20,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2022-07-13 22:21:20,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states 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 22:21:20,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 22:21:20,806 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 22:21:20,806 INFO L186 Difference]: Start difference. First operand has 161 places, 156 transitions, 339 flow. Second operand 5 states and 789 transitions. [2022-07-13 22:21:20,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 184 transitions, 515 flow [2022-07-13 22:21:20,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 184 transitions, 511 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-13 22:21:20,811 INFO L242 Difference]: Finished difference. Result has 163 places, 160 transitions, 392 flow [2022-07-13 22:21:20,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=163, PETRI_TRANSITIONS=160} [2022-07-13 22:21:20,813 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 2 predicate places. [2022-07-13 22:21:20,813 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 160 transitions, 392 flow [2022-07-13 22:21:20,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states 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 22:21:20,814 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:20,814 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:20,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:21:20,814 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 22:21:20,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:20,815 INFO L85 PathProgramCache]: Analyzing trace with hash 76398777, now seen corresponding path program 2 times [2022-07-13 22:21:20,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:20,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794377407] [2022-07-13 22:21:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:20,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:20,926 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 22:21:20,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:20,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794377407] [2022-07-13 22:21:20,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794377407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:21:20,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:21:20,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:21:20,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787466898] [2022-07-13 22:21:20,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:21:20,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:21:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:20,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:21:20,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:21:20,932 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2022-07-13 22:21:20,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 160 transitions, 392 flow. Second operand has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 states have internal predecessors, (898), 0 states have call successors, (0), 0 states 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 22:21:20,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:20,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2022-07-13 22:21:20,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:21,017 INFO L129 PetriNetUnfolder]: 91/366 cut-off events. [2022-07-13 22:21:21,017 INFO L130 PetriNetUnfolder]: For 116/126 co-relation queries the response was YES. [2022-07-13 22:21:21,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 366 events. 91/366 cut-off events. For 116/126 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1172 event pairs, 28 based on Foata normal form. 12/370 useless extension candidates. Maximal degree in co-relation 682. Up to 116 conditions per place. [2022-07-13 22:21:21,020 INFO L132 encePairwiseOnDemand]: 170/178 looper letters, 33 selfloop transitions, 7 changer transitions 6/178 dead transitions. [2022-07-13 22:21:21,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 178 transitions, 532 flow [2022-07-13 22:21:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:21:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:21:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 929 transitions. [2022-07-13 22:21:21,022 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8698501872659176 [2022-07-13 22:21:21,022 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 929 transitions. [2022-07-13 22:21:21,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 929 transitions. [2022-07-13 22:21:21,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:21,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 929 transitions. [2022-07-13 22:21:21,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.83333333333334) internal successors, (929), 6 states have internal predecessors, (929), 0 states have call successors, (0), 0 states 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 22:21:21,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states 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 22:21:21,027 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states 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 22:21:21,027 INFO L186 Difference]: Start difference. First operand has 163 places, 160 transitions, 392 flow. Second operand 6 states and 929 transitions. [2022-07-13 22:21:21,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 178 transitions, 532 flow [2022-07-13 22:21:21,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 178 transitions, 518 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:21:21,030 INFO L242 Difference]: Finished difference. Result has 166 places, 158 transitions, 385 flow [2022-07-13 22:21:21,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=166, PETRI_TRANSITIONS=158} [2022-07-13 22:21:21,031 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 5 predicate places. [2022-07-13 22:21:21,031 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 158 transitions, 385 flow [2022-07-13 22:21:21,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 states have internal predecessors, (898), 0 states have call successors, (0), 0 states 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 22:21:21,032 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:21,032 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:21,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:21:21,032 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 22:21:21,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:21,033 INFO L85 PathProgramCache]: Analyzing trace with hash -373622335, now seen corresponding path program 1 times [2022-07-13 22:21:21,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:21,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853881746] [2022-07-13 22:21:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:21,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:21,089 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 22:21:21,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:21,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853881746] [2022-07-13 22:21:21,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853881746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:21:21,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:21:21,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:21:21,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33235796] [2022-07-13 22:21:21,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:21:21,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:21:21,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:21,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:21:21,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:21:21,092 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 178 [2022-07-13 22:21:21,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 158 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 22:21:21,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:21,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 178 [2022-07-13 22:21:21,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:21,169 INFO L129 PetriNetUnfolder]: 31/275 cut-off events. [2022-07-13 22:21:21,170 INFO L130 PetriNetUnfolder]: For 53/59 co-relation queries the response was YES. [2022-07-13 22:21:21,170 INFO L84 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 275 events. 31/275 cut-off events. For 53/59 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 560 event pairs, 14 based on Foata normal form. 5/271 useless extension candidates. Maximal degree in co-relation 462. Up to 56 conditions per place. [2022-07-13 22:21:21,171 INFO L132 encePairwiseOnDemand]: 169/178 looper letters, 35 selfloop transitions, 6 changer transitions 4/166 dead transitions. [2022-07-13 22:21:21,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 166 transitions, 493 flow [2022-07-13 22:21:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:21:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:21:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 982 transitions. [2022-07-13 22:21:21,173 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7881219903691814 [2022-07-13 22:21:21,173 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 982 transitions. [2022-07-13 22:21:21,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 982 transitions. [2022-07-13 22:21:21,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:21,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 982 transitions. [2022-07-13 22:21:21,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 22:21:21,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states 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 22:21:21,178 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states 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 22:21:21,178 INFO L186 Difference]: Start difference. First operand has 166 places, 158 transitions, 385 flow. Second operand 7 states and 982 transitions. [2022-07-13 22:21:21,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 166 transitions, 493 flow [2022-07-13 22:21:21,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 166 transitions, 473 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-13 22:21:21,183 INFO L242 Difference]: Finished difference. Result has 170 places, 159 transitions, 389 flow [2022-07-13 22:21:21,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=389, PETRI_PLACES=170, PETRI_TRANSITIONS=159} [2022-07-13 22:21:21,185 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 9 predicate places. [2022-07-13 22:21:21,185 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 159 transitions, 389 flow [2022-07-13 22:21:21,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 22:21:21,186 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:21,186 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:21,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:21:21,186 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 22:21:21,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:21,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2085282566, now seen corresponding path program 1 times [2022-07-13 22:21:21,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:21,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681733862] [2022-07-13 22:21:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:21,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:21:21,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:21,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681733862] [2022-07-13 22:21:21,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681733862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:21,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5788658] [2022-07-13 22:21:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:21,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:21,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:21,274 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 22:21:21,275 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 22:21:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:21,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:21:21,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:21:21,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:21:21,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5788658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:21,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:21,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-13 22:21:21,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82873328] [2022-07-13 22:21:21,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:21,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:21:21,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:21,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:21:21,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-13 22:21:21,869 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2022-07-13 22:21:21,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 159 transitions, 389 flow. Second operand has 11 states, 11 states have (on average 150.9090909090909) internal successors, (1660), 11 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states 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 22:21:21,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:21,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2022-07-13 22:21:21,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:22,008 INFO L129 PetriNetUnfolder]: 110/441 cut-off events. [2022-07-13 22:21:22,008 INFO L130 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-07-13 22:21:22,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 441 events. 110/441 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1473 event pairs, 20 based on Foata normal form. 7/444 useless extension candidates. Maximal degree in co-relation 861. Up to 70 conditions per place. [2022-07-13 22:21:22,011 INFO L132 encePairwiseOnDemand]: 170/178 looper letters, 58 selfloop transitions, 19 changer transitions 0/210 dead transitions. [2022-07-13 22:21:22,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 210 transitions, 713 flow [2022-07-13 22:21:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 22:21:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 22:21:22,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1843 transitions. [2022-07-13 22:21:22,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8628277153558053 [2022-07-13 22:21:22,014 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1843 transitions. [2022-07-13 22:21:22,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1843 transitions. [2022-07-13 22:21:22,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:22,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1843 transitions. [2022-07-13 22:21:22,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states 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 22:21:22,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states 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 22:21:22,021 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states 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 22:21:22,021 INFO L186 Difference]: Start difference. First operand has 170 places, 159 transitions, 389 flow. Second operand 12 states and 1843 transitions. [2022-07-13 22:21:22,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 210 transitions, 713 flow [2022-07-13 22:21:22,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 210 transitions, 703 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:21:22,025 INFO L242 Difference]: Finished difference. Result has 181 places, 170 transitions, 498 flow [2022-07-13 22:21:22,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=498, PETRI_PLACES=181, PETRI_TRANSITIONS=170} [2022-07-13 22:21:22,026 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 20 predicate places. [2022-07-13 22:21:22,026 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 170 transitions, 498 flow [2022-07-13 22:21:22,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 150.9090909090909) internal successors, (1660), 11 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states 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 22:21:22,027 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:22,027 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:22,046 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 22:21:22,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-13 22:21:22,243 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 22:21:22,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:22,243 INFO L85 PathProgramCache]: Analyzing trace with hash -17716140, now seen corresponding path program 1 times [2022-07-13 22:21:22,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:22,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903012708] [2022-07-13 22:21:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:22,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:21:22,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:22,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903012708] [2022-07-13 22:21:22,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903012708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:21:22,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:21:22,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:21:22,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295049093] [2022-07-13 22:21:22,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:21:22,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:21:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:21:22,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:21:22,302 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 178 [2022-07-13 22:21:22,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 170 transitions, 498 flow. Second operand has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 22:21:22,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:22,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 178 [2022-07-13 22:21:22,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:22,393 INFO L129 PetriNetUnfolder]: 46/388 cut-off events. [2022-07-13 22:21:22,393 INFO L130 PetriNetUnfolder]: For 233/236 co-relation queries the response was YES. [2022-07-13 22:21:22,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 388 events. 46/388 cut-off events. For 233/236 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1000 event pairs, 21 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 737. Up to 90 conditions per place. [2022-07-13 22:21:22,395 INFO L132 encePairwiseOnDemand]: 167/178 looper letters, 40 selfloop transitions, 8 changer transitions 17/191 dead transitions. [2022-07-13 22:21:22,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 191 transitions, 682 flow [2022-07-13 22:21:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:21:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:21:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1262 transitions. [2022-07-13 22:21:22,398 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.787765293383271 [2022-07-13 22:21:22,398 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1262 transitions. [2022-07-13 22:21:22,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1262 transitions. [2022-07-13 22:21:22,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:22,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1262 transitions. [2022-07-13 22:21:22,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.22222222222223) internal successors, (1262), 9 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states 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 22:21:22,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states 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 22:21:22,404 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states 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 22:21:22,404 INFO L186 Difference]: Start difference. First operand has 181 places, 170 transitions, 498 flow. Second operand 9 states and 1262 transitions. [2022-07-13 22:21:22,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 191 transitions, 682 flow [2022-07-13 22:21:22,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 191 transitions, 645 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-07-13 22:21:22,410 INFO L242 Difference]: Finished difference. Result has 187 places, 171 transitions, 491 flow [2022-07-13 22:21:22,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=491, PETRI_PLACES=187, PETRI_TRANSITIONS=171} [2022-07-13 22:21:22,410 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 26 predicate places. [2022-07-13 22:21:22,411 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 171 transitions, 491 flow [2022-07-13 22:21:22,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 22:21:22,412 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:22,412 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:22,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:21:22,412 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 22:21:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:22,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1730991474, now seen corresponding path program 1 times [2022-07-13 22:21:22,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:22,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275793535] [2022-07-13 22:21:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:22,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:24,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:24,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275793535] [2022-07-13 22:21:24,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275793535] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:24,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653940933] [2022-07-13 22:21:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:24,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:24,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:24,708 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 22:21:24,709 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 22:21:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:24,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-13 22:21:24,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:27,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:21:27,395 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 22:21:27,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 18 [2022-07-13 22:21:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:27,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:28,341 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:21:28,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 138 [2022-07-13 22:21:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:31,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653940933] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:31,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:31,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 31] total 103 [2022-07-13 22:21:31,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092286265] [2022-07-13 22:21:31,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:31,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-07-13 22:21:31,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-07-13 22:21:31,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=9487, Unknown=0, NotChecked=0, Total=10506 [2022-07-13 22:21:31,256 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 178 [2022-07-13 22:21:31,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 171 transitions, 491 flow. Second operand has 103 states, 103 states have (on average 66.63106796116504) internal successors, (6863), 103 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states 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 22:21:31,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:31,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 178 [2022-07-13 22:21:31,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:41,719 INFO L129 PetriNetUnfolder]: 734/1762 cut-off events. [2022-07-13 22:21:41,719 INFO L130 PetriNetUnfolder]: For 1211/1211 co-relation queries the response was YES. [2022-07-13 22:21:41,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4487 conditions, 1762 events. 734/1762 cut-off events. For 1211/1211 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10548 event pairs, 94 based on Foata normal form. 32/1784 useless extension candidates. Maximal degree in co-relation 4470. Up to 515 conditions per place. [2022-07-13 22:21:41,728 INFO L132 encePairwiseOnDemand]: 123/178 looper letters, 283 selfloop transitions, 160 changer transitions 40/537 dead transitions. [2022-07-13 22:21:41,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 537 transitions, 2706 flow [2022-07-13 22:21:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-07-13 22:21:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2022-07-13 22:21:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 7063 transitions. [2022-07-13 22:21:41,741 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3852405367077561 [2022-07-13 22:21:41,742 INFO L72 ComplementDD]: Start complementDD. Operand 103 states and 7063 transitions. [2022-07-13 22:21:41,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 7063 transitions. [2022-07-13 22:21:41,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:41,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 103 states and 7063 transitions. [2022-07-13 22:21:41,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 104 states, 103 states have (on average 68.57281553398059) internal successors, (7063), 103 states have internal predecessors, (7063), 0 states have call successors, (0), 0 states 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 22:21:41,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 104 states, 104 states have (on average 178.0) internal successors, (18512), 104 states have internal predecessors, (18512), 0 states have call successors, (0), 0 states 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 22:21:41,774 INFO L81 ComplementDD]: Finished complementDD. Result has 104 states, 104 states have (on average 178.0) internal successors, (18512), 104 states have internal predecessors, (18512), 0 states have call successors, (0), 0 states 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 22:21:41,774 INFO L186 Difference]: Start difference. First operand has 187 places, 171 transitions, 491 flow. Second operand 103 states and 7063 transitions. [2022-07-13 22:21:41,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 537 transitions, 2706 flow [2022-07-13 22:21:41,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 537 transitions, 2610 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-07-13 22:21:41,785 INFO L242 Difference]: Finished difference. Result has 336 places, 307 transitions, 1668 flow [2022-07-13 22:21:41,785 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=1668, PETRI_PLACES=336, PETRI_TRANSITIONS=307} [2022-07-13 22:21:41,786 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 175 predicate places. [2022-07-13 22:21:41,786 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 307 transitions, 1668 flow [2022-07-13 22:21:41,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 66.63106796116504) internal successors, (6863), 103 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states 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 22:21:41,788 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:41,788 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:41,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:21:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-13 22:21:42,008 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 22:21:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1965360992, now seen corresponding path program 2 times [2022-07-13 22:21:42,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:42,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902016511] [2022-07-13 22:21:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:42,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:44,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:44,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902016511] [2022-07-13 22:21:44,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902016511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:44,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583631500] [2022-07-13 22:21:44,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:21:44,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:44,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:44,826 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 22:21:44,827 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 22:21:44,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:21:44,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:21:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-13 22:21:44,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:46,321 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 22:21:46,793 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 22:21:46,947 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 22:21:47,258 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:21:47,259 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 56 treesize of output 36 [2022-07-13 22:21:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:47,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:50,928 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:21:50,929 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 210 treesize of output 138 [2022-07-13 22:21:50,966 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:21:50,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 770 treesize of output 774 [2022-07-13 22:21:51,009 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:21:51,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 666 treesize of output 684 [2022-07-13 22:21:51,048 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:21:51,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 588 treesize of output 528 [2022-07-13 22:22:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:14,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583631500] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:14,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:14,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 39, 36] total 112 [2022-07-13 22:22:14,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276343810] [2022-07-13 22:22:14,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:14,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-07-13 22:22:14,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:14,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-07-13 22:22:14,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1222, Invalid=11175, Unknown=35, NotChecked=0, Total=12432 [2022-07-13 22:22:14,543 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 178 [2022-07-13 22:22:14,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 307 transitions, 1668 flow. Second operand has 112 states, 112 states have (on average 55.580357142857146) internal successors, (6225), 112 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states 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 22:22:14,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:14,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 178 [2022-07-13 22:22:14,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:39,760 INFO L129 PetriNetUnfolder]: 2489/5211 cut-off events. [2022-07-13 22:22:39,761 INFO L130 PetriNetUnfolder]: For 24638/24638 co-relation queries the response was YES. [2022-07-13 22:22:39,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22948 conditions, 5211 events. 2489/5211 cut-off events. For 24638/24638 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40811 event pairs, 71 based on Foata normal form. 17/5206 useless extension candidates. Maximal degree in co-relation 22878. Up to 922 conditions per place. [2022-07-13 22:22:39,816 INFO L132 encePairwiseOnDemand]: 118/178 looper letters, 603 selfloop transitions, 737 changer transitions 19/1406 dead transitions. [2022-07-13 22:22:39,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 1406 transitions, 12511 flow [2022-07-13 22:22:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-07-13 22:22:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2022-07-13 22:22:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 13101 transitions. [2022-07-13 22:22:39,840 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3256686884756886 [2022-07-13 22:22:39,841 INFO L72 ComplementDD]: Start complementDD. Operand 226 states and 13101 transitions. [2022-07-13 22:22:39,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 226 states and 13101 transitions. [2022-07-13 22:22:39,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:39,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 226 states and 13101 transitions. [2022-07-13 22:22:39,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 227 states, 226 states have (on average 57.969026548672566) internal successors, (13101), 226 states have internal predecessors, (13101), 0 states have call successors, (0), 0 states 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 22:22:39,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 227 states, 227 states have (on average 178.0) internal successors, (40406), 227 states have internal predecessors, (40406), 0 states have call successors, (0), 0 states 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 22:22:39,921 INFO L81 ComplementDD]: Finished complementDD. Result has 227 states, 227 states have (on average 178.0) internal successors, (40406), 227 states have internal predecessors, (40406), 0 states have call successors, (0), 0 states 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 22:22:39,922 INFO L186 Difference]: Start difference. First operand has 336 places, 307 transitions, 1668 flow. Second operand 226 states and 13101 transitions. [2022-07-13 22:22:39,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 1406 transitions, 12511 flow [2022-07-13 22:22:40,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1406 transitions, 12012 flow, removed 218 selfloop flow, removed 25 redundant places. [2022-07-13 22:22:40,028 INFO L242 Difference]: Finished difference. Result has 552 places, 1007 transitions, 8774 flow [2022-07-13 22:22:40,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=226, PETRI_FLOW=8774, PETRI_PLACES=552, PETRI_TRANSITIONS=1007} [2022-07-13 22:22:40,029 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 391 predicate places. [2022-07-13 22:22:40,029 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 1007 transitions, 8774 flow [2022-07-13 22:22:40,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 55.580357142857146) internal successors, (6225), 112 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states 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 22:22:40,031 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:40,031 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:22:40,059 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 22:22:40,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:40,249 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 22:22:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:40,250 INFO L85 PathProgramCache]: Analyzing trace with hash 146228680, now seen corresponding path program 3 times [2022-07-13 22:22:40,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:40,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771467332] [2022-07-13 22:22:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:40,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:44,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:44,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771467332] [2022-07-13 22:22:44,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771467332] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:44,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876068238] [2022-07-13 22:22:44,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:22:44,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:44,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:44,251 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 22:22:44,251 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 22:22:44,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:22:44,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:44,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-13 22:22:44,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:46,040 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 22:22:46,539 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 22:22:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:22:46,844 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 29 treesize of output 29 [2022-07-13 22:22:47,299 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:22:47,300 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 54 treesize of output 36 [2022-07-13 22:22:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:47,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:51,534 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:22:51,534 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 181 treesize of output 121 [2022-07-13 22:22:51,567 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:22:51,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 638 treesize of output 674 [2022-07-13 22:22:51,602 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:22:51,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 566 treesize of output 608 [2022-07-13 22:22:51,630 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:22:51,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 494 treesize of output 446 [2022-07-13 22:23:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:03,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876068238] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:03,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:03,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 40] total 123 [2022-07-13 22:23:03,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137769427] [2022-07-13 22:23:03,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:03,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-07-13 22:23:03,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:03,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-07-13 22:23:03,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=14181, Unknown=14, NotChecked=0, Total=15006 [2022-07-13 22:23:03,559 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 178 [2022-07-13 22:23:03,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 1007 transitions, 8774 flow. Second operand has 123 states, 123 states have (on average 56.292682926829265) internal successors, (6924), 123 states have internal predecessors, (6924), 0 states have call successors, (0), 0 states 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 22:23:03,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:03,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 178 [2022-07-13 22:23:03,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:35,798 INFO L129 PetriNetUnfolder]: 4430/8736 cut-off events. [2022-07-13 22:23:35,799 INFO L130 PetriNetUnfolder]: For 71274/71283 co-relation queries the response was YES. [2022-07-13 22:23:35,955 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49835 conditions, 8736 events. 4430/8736 cut-off events. For 71274/71283 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 74530 event pairs, 103 based on Foata normal form. 16/8726 useless extension candidates. Maximal degree in co-relation 49748. Up to 1626 conditions per place. [2022-07-13 22:23:36,001 INFO L132 encePairwiseOnDemand]: 116/178 looper letters, 604 selfloop transitions, 1636 changer transitions 22/2310 dead transitions. [2022-07-13 22:23:36,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 742 places, 2310 transitions, 27144 flow [2022-07-13 22:23:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-07-13 22:23:36,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2022-07-13 22:23:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 11549 transitions. [2022-07-13 22:23:36,013 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3276869821813642 [2022-07-13 22:23:36,014 INFO L72 ComplementDD]: Start complementDD. Operand 198 states and 11549 transitions. [2022-07-13 22:23:36,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 198 states and 11549 transitions. [2022-07-13 22:23:36,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:36,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 198 states and 11549 transitions. [2022-07-13 22:23:36,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 199 states, 198 states have (on average 58.32828282828283) internal successors, (11549), 198 states have internal predecessors, (11549), 0 states have call successors, (0), 0 states 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 22:23:36,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 199 states, 199 states have (on average 178.0) internal successors, (35422), 199 states have internal predecessors, (35422), 0 states have call successors, (0), 0 states 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 22:23:36,065 INFO L81 ComplementDD]: Finished complementDD. Result has 199 states, 199 states have (on average 178.0) internal successors, (35422), 199 states have internal predecessors, (35422), 0 states have call successors, (0), 0 states 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 22:23:36,065 INFO L186 Difference]: Start difference. First operand has 552 places, 1007 transitions, 8774 flow. Second operand 198 states and 11549 transitions. [2022-07-13 22:23:36,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 742 places, 2310 transitions, 27144 flow [2022-07-13 22:23:37,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 2310 transitions, 22012 flow, removed 2420 selfloop flow, removed 66 redundant places. [2022-07-13 22:23:37,865 INFO L242 Difference]: Finished difference. Result has 725 places, 1962 transitions, 19439 flow [2022-07-13 22:23:37,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=198, PETRI_FLOW=19439, PETRI_PLACES=725, PETRI_TRANSITIONS=1962} [2022-07-13 22:23:37,866 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 564 predicate places. [2022-07-13 22:23:37,866 INFO L495 AbstractCegarLoop]: Abstraction has has 725 places, 1962 transitions, 19439 flow [2022-07-13 22:23:37,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 56.292682926829265) internal successors, (6924), 123 states have internal predecessors, (6924), 0 states have call successors, (0), 0 states 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 22:23:37,868 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:37,868 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:37,885 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 22:23:38,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:38,069 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 22:23:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:38,069 INFO L85 PathProgramCache]: Analyzing trace with hash 48866768, now seen corresponding path program 4 times [2022-07-13 22:23:38,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:38,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925977404] [2022-07-13 22:23:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:41,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:41,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925977404] [2022-07-13 22:23:41,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925977404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:41,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450779217] [2022-07-13 22:23:41,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:23:41,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:41,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:41,874 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 22:23:41,875 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 22:23:41,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:23:41,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:23:41,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-13 22:23:41,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:43,672 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 22:23:44,332 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 22:23:44,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:23:44,661 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 29 treesize of output 29 [2022-07-13 22:23:44,985 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:23:44,986 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 50 treesize of output 34 [2022-07-13 22:23:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:45,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:49,495 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:23:49,496 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 181 treesize of output 121 [2022-07-13 22:23:49,530 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:23:49,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 556 treesize of output 600 [2022-07-13 22:23:49,561 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:23:49,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 432 [2022-07-13 22:23:49,602 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:23:49,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 408 treesize of output 456 [2022-07-13 22:25:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:25:28,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450779217] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:25:28,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:25:28,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 40, 40] total 117 [2022-07-13 22:25:28,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112268418] [2022-07-13 22:25:28,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:25:28,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-07-13 22:25:28,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-07-13 22:25:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=12801, Unknown=25, NotChecked=0, Total=13572 [2022-07-13 22:25:28,507 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 178 [2022-07-13 22:25:28,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 725 places, 1962 transitions, 19439 flow. Second operand has 117 states, 117 states have (on average 52.51282051282051) internal successors, (6144), 117 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states 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 22:25:28,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:28,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 178 [2022-07-13 22:25:28,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand