./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-5.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/unroll-cond-5.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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:25:29,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:25:29,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:25:29,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:25:29,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:25:29,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:25:29,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:25:29,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:25:29,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:25:29,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:25:29,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:25:29,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:25:29,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:25:29,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:25:29,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:25:29,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:25:29,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:25:29,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:25:29,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:25:29,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:25:29,633 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:25:29,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:25:29,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:25:29,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:25:29,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:25:29,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:25:29,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:25:29,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:25:29,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:25:29,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:25:29,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:25:29,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:25:29,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:25:29,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:25:29,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:25:29,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:25:29,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:25:29,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:25:29,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:25:29,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:25:29,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:25:29,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:25:29,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:25:29,678 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:25:29,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:25:29,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:25:29,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:25:29,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:25:29,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:25:29,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:25:29,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:25:29,681 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:25:29,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:25:29,682 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:25:29,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:25:29,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:25:29,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:25:29,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:25:29,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:25:29,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:25:29,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:25:29,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:25:29,683 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:25:29,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:25:29,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:25:29,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:25:29,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:25:29,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:25:29,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:25:29,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:25:29,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:25:29,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:25:29,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:25:29,685 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:25:29,685 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:25:29,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:25:29,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 [2022-07-13 22:25:29,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:25:29,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:25:29,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:25:29,886 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:25:29,887 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:25:29,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-07-13 22:25:29,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee7fd4359/b0549b5cfd994539bf636c546ac57f9a/FLAG89dcf5f13 [2022-07-13 22:25:30,318 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:25:30,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-07-13 22:25:30,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee7fd4359/b0549b5cfd994539bf636c546ac57f9a/FLAG89dcf5f13 [2022-07-13 22:25:30,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee7fd4359/b0549b5cfd994539bf636c546ac57f9a [2022-07-13 22:25:30,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:25:30,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:25:30,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:25:30,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:25:30,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:25:30,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1982fbde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30, skipping insertion in model container [2022-07-13 22:25:30,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:25:30,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:25:30,497 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/unroll-cond-5.wvr.c[2975,2988] [2022-07-13 22:25:30,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:25:30,506 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:25:30,523 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/unroll-cond-5.wvr.c[2975,2988] [2022-07-13 22:25:30,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:25:30,533 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:25:30,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30 WrapperNode [2022-07-13 22:25:30,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:25:30,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:25:30,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:25:30,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:25:30,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,565 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 204 [2022-07-13 22:25:30,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:25:30,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:25:30,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:25:30,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:25:30,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:25:30,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:25:30,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:25:30,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:25:30,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30" (1/1) ... [2022-07-13 22:25:30,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:25:30,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:25:30,647 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 22:25:30,655 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 22:25:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:25:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:25:30,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:25:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:25:30,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:25:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:25:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:25:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:25:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:25:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:25:30,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:25:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:25:30,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:25:30,681 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 22:25:30,764 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:25:30,765 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:25:31,014 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:25:31,028 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:25:31,028 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 22:25:31,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:25:31 BoogieIcfgContainer [2022-07-13 22:25:31,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:25:31,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:25:31,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:25:31,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:25:31,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:25:30" (1/3) ... [2022-07-13 22:25:31,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e57faa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:25:31, skipping insertion in model container [2022-07-13 22:25:31,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:25:30" (2/3) ... [2022-07-13 22:25:31,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e57faa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:25:31, skipping insertion in model container [2022-07-13 22:25:31,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:25:31" (3/3) ... [2022-07-13 22:25:31,036 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2022-07-13 22:25:31,041 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:25:31,047 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:25:31,048 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:25:31,048 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:25:31,113 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:25:31,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 252 places, 269 transitions, 554 flow [2022-07-13 22:25:31,194 INFO L129 PetriNetUnfolder]: 24/267 cut-off events. [2022-07-13 22:25:31,194 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:25:31,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 267 events. 24/267 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 515 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 171. Up to 2 conditions per place. [2022-07-13 22:25:31,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 269 transitions, 554 flow [2022-07-13 22:25:31,205 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 258 transitions, 528 flow [2022-07-13 22:25:31,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:25:31,217 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@7c50c5d2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@792e03fe [2022-07-13 22:25:31,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:25:31,250 INFO L129 PetriNetUnfolder]: 20/215 cut-off events. [2022-07-13 22:25:31,250 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:25:31,250 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:31,251 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] [2022-07-13 22:25:31,251 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 22:25:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2077620581, now seen corresponding path program 1 times [2022-07-13 22:25:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:31,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73997746] [2022-07-13 22:25:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:31,438 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 22:25:31,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:31,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73997746] [2022-07-13 22:25:31,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73997746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:31,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:31,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:25:31,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510231045] [2022-07-13 22:25:31,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:31,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:25:31,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:25:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:25:31,477 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 269 [2022-07-13 22:25:31,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 258 transitions, 528 flow. Second operand has 2 states, 2 states have (on average 250.0) internal successors, (500), 2 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:31,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:31,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 269 [2022-07-13 22:25:31,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:31,538 INFO L129 PetriNetUnfolder]: 7/241 cut-off events. [2022-07-13 22:25:31,538 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 22:25:31,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 241 events. 7/241 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 472 event pairs, 0 based on Foata normal form. 20/240 useless extension candidates. Maximal degree in co-relation 160. Up to 5 conditions per place. [2022-07-13 22:25:31,543 INFO L132 encePairwiseOnDemand]: 252/269 looper letters, 4 selfloop transitions, 0 changer transitions 4/241 dead transitions. [2022-07-13 22:25:31,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 241 transitions, 502 flow [2022-07-13 22:25:31,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:25:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:25:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 515 transitions. [2022-07-13 22:25:31,555 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9572490706319703 [2022-07-13 22:25:31,556 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 515 transitions. [2022-07-13 22:25:31,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 515 transitions. [2022-07-13 22:25:31,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:31,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 515 transitions. [2022-07-13 22:25:31,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 257.5) internal successors, (515), 2 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:31,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:31,568 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:31,569 INFO L186 Difference]: Start difference. First operand has 241 places, 258 transitions, 528 flow. Second operand 2 states and 515 transitions. [2022-07-13 22:25:31,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 241 transitions, 502 flow [2022-07-13 22:25:31,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 241 transitions, 494 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:25:31,577 INFO L242 Difference]: Finished difference. Result has 238 places, 237 transitions, 478 flow [2022-07-13 22:25:31,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=478, PETRI_PLACES=238, PETRI_TRANSITIONS=237} [2022-07-13 22:25:31,581 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, -3 predicate places. [2022-07-13 22:25:31,581 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 237 transitions, 478 flow [2022-07-13 22:25:31,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 250.0) internal successors, (500), 2 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:31,582 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:31,582 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] [2022-07-13 22:25:31,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:25:31,583 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 22:25:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:31,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1370319885, now seen corresponding path program 1 times [2022-07-13 22:25:31,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:31,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926573480] [2022-07-13 22:25:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:31,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:31,799 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 22:25:31,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:31,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926573480] [2022-07-13 22:25:31,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926573480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:31,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:31,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:25:31,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331662123] [2022-07-13 22:25:31,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:31,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:25:31,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:25:31,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:25:31,809 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 269 [2022-07-13 22:25:31,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 237 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:31,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:31,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 269 [2022-07-13 22:25:31,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:31,997 INFO L129 PetriNetUnfolder]: 209/989 cut-off events. [2022-07-13 22:25:31,998 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-07-13 22:25:31,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 989 events. 209/989 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4992 event pairs, 56 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 1342. Up to 269 conditions per place. [2022-07-13 22:25:32,002 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 49 selfloop transitions, 5 changer transitions 0/254 dead transitions. [2022-07-13 22:25:32,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 254 transitions, 622 flow [2022-07-13 22:25:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:25:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:25:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 911 transitions. [2022-07-13 22:25:32,006 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8466542750929368 [2022-07-13 22:25:32,006 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 911 transitions. [2022-07-13 22:25:32,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 911 transitions. [2022-07-13 22:25:32,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:32,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 911 transitions. [2022-07-13 22:25:32,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.75) internal successors, (911), 4 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:32,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:32,012 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:32,012 INFO L186 Difference]: Start difference. First operand has 238 places, 237 transitions, 478 flow. Second operand 4 states and 911 transitions. [2022-07-13 22:25:32,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 254 transitions, 622 flow [2022-07-13 22:25:32,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 254 transitions, 622 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:25:32,021 INFO L242 Difference]: Finished difference. Result has 239 places, 241 transitions, 512 flow [2022-07-13 22:25:32,022 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=512, PETRI_PLACES=239, PETRI_TRANSITIONS=241} [2022-07-13 22:25:32,023 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, -2 predicate places. [2022-07-13 22:25:32,023 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 241 transitions, 512 flow [2022-07-13 22:25:32,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:32,023 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:32,024 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] [2022-07-13 22:25:32,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:25:32,024 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 22:25:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash -735789891, now seen corresponding path program 1 times [2022-07-13 22:25:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:32,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906851987] [2022-07-13 22:25:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:32,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:32,261 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 22:25:32,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:32,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906851987] [2022-07-13 22:25:32,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906851987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:32,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:32,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:25:32,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640903742] [2022-07-13 22:25:32,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:32,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:25:32,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:32,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:25:32,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:25:32,267 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 269 [2022-07-13 22:25:32,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 241 transitions, 512 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:32,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:32,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 269 [2022-07-13 22:25:32,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:32,423 INFO L129 PetriNetUnfolder]: 195/921 cut-off events. [2022-07-13 22:25:32,424 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-07-13 22:25:32,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 921 events. 195/921 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4450 event pairs, 83 based on Foata normal form. 0/789 useless extension candidates. Maximal degree in co-relation 1296. Up to 270 conditions per place. [2022-07-13 22:25:32,431 INFO L132 encePairwiseOnDemand]: 264/269 looper letters, 46 selfloop transitions, 4 changer transitions 0/250 dead transitions. [2022-07-13 22:25:32,431 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 250 transitions, 629 flow [2022-07-13 22:25:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:25:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:25:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 907 transitions. [2022-07-13 22:25:32,433 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8429368029739777 [2022-07-13 22:25:32,433 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 907 transitions. [2022-07-13 22:25:32,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 907 transitions. [2022-07-13 22:25:32,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:32,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 907 transitions. [2022-07-13 22:25:32,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:32,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:32,438 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:32,438 INFO L186 Difference]: Start difference. First operand has 239 places, 241 transitions, 512 flow. Second operand 4 states and 907 transitions. [2022-07-13 22:25:32,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 250 transitions, 629 flow [2022-07-13 22:25:32,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 250 transitions, 622 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-13 22:25:32,442 INFO L242 Difference]: Finished difference. Result has 242 places, 240 transitions, 512 flow [2022-07-13 22:25:32,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=512, PETRI_PLACES=242, PETRI_TRANSITIONS=240} [2022-07-13 22:25:32,444 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 1 predicate places. [2022-07-13 22:25:32,445 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 240 transitions, 512 flow [2022-07-13 22:25:32,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:32,445 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:32,446 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] [2022-07-13 22:25:32,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:25:32,446 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 22:25:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:32,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1706270672, now seen corresponding path program 1 times [2022-07-13 22:25:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:32,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999434212] [2022-07-13 22:25:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:32,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:33,037 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 22:25:33,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:33,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999434212] [2022-07-13 22:25:33,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999434212] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:33,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:33,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 22:25:33,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539072062] [2022-07-13 22:25:33,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:33,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:25:33,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:33,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:25:33,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:25:33,040 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 269 [2022-07-13 22:25:33,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 240 transitions, 512 flow. Second operand has 8 states, 8 states have (on average 212.125) internal successors, (1697), 8 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:33,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:33,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 269 [2022-07-13 22:25:33,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:33,839 INFO L129 PetriNetUnfolder]: 577/2766 cut-off events. [2022-07-13 22:25:33,840 INFO L130 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2022-07-13 22:25:33,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3995 conditions, 2766 events. 577/2766 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 21162 event pairs, 153 based on Foata normal form. 0/2461 useless extension candidates. Maximal degree in co-relation 3988. Up to 368 conditions per place. [2022-07-13 22:25:33,850 INFO L132 encePairwiseOnDemand]: 256/269 looper letters, 170 selfloop transitions, 35 changer transitions 0/401 dead transitions. [2022-07-13 22:25:33,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 401 transitions, 1311 flow [2022-07-13 22:25:33,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:25:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:25:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3571 transitions. [2022-07-13 22:25:33,856 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8296933085501859 [2022-07-13 22:25:33,857 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3571 transitions. [2022-07-13 22:25:33,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3571 transitions. [2022-07-13 22:25:33,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:33,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3571 transitions. [2022-07-13 22:25:33,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 223.1875) internal successors, (3571), 16 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:33,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 269.0) internal successors, (4573), 17 states have internal predecessors, (4573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:33,871 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 269.0) internal successors, (4573), 17 states have internal predecessors, (4573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:33,872 INFO L186 Difference]: Start difference. First operand has 242 places, 240 transitions, 512 flow. Second operand 16 states and 3571 transitions. [2022-07-13 22:25:33,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 401 transitions, 1311 flow [2022-07-13 22:25:33,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 401 transitions, 1289 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 22:25:33,878 INFO L242 Difference]: Finished difference. Result has 264 places, 268 transitions, 739 flow [2022-07-13 22:25:33,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=739, PETRI_PLACES=264, PETRI_TRANSITIONS=268} [2022-07-13 22:25:33,879 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 23 predicate places. [2022-07-13 22:25:33,879 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 268 transitions, 739 flow [2022-07-13 22:25:33,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 212.125) internal successors, (1697), 8 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:33,880 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:33,880 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] [2022-07-13 22:25:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:25:33,881 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 22:25:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:33,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1578631382, now seen corresponding path program 1 times [2022-07-13 22:25:33,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:33,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325169049] [2022-07-13 22:25:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:33,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:33,974 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 22:25:33,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:33,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325169049] [2022-07-13 22:25:33,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325169049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:33,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:33,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:25:33,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051384371] [2022-07-13 22:25:33,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:33,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:25:33,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:33,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:25:33,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:25:33,977 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-13 22:25:33,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 268 transitions, 739 flow. Second operand has 5 states, 5 states have (on average 214.6) internal successors, (1073), 5 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:33,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:33,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-13 22:25:33,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:34,530 INFO L129 PetriNetUnfolder]: 572/2836 cut-off events. [2022-07-13 22:25:34,530 INFO L130 PetriNetUnfolder]: For 2987/2987 co-relation queries the response was YES. [2022-07-13 22:25:34,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5126 conditions, 2836 events. 572/2836 cut-off events. For 2987/2987 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 21878 event pairs, 282 based on Foata normal form. 2/2618 useless extension candidates. Maximal degree in co-relation 5109. Up to 580 conditions per place. [2022-07-13 22:25:34,545 INFO L132 encePairwiseOnDemand]: 261/269 looper letters, 118 selfloop transitions, 21 changer transitions 0/338 dead transitions. [2022-07-13 22:25:34,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 338 transitions, 1234 flow [2022-07-13 22:25:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:25:34,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:25:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1377 transitions. [2022-07-13 22:25:34,549 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8531598513011153 [2022-07-13 22:25:34,549 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1377 transitions. [2022-07-13 22:25:34,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1377 transitions. [2022-07-13 22:25:34,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:34,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1377 transitions. [2022-07-13 22:25:34,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 229.5) internal successors, (1377), 6 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:34,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:34,554 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:34,555 INFO L186 Difference]: Start difference. First operand has 264 places, 268 transitions, 739 flow. Second operand 6 states and 1377 transitions. [2022-07-13 22:25:34,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 338 transitions, 1234 flow [2022-07-13 22:25:34,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 338 transitions, 1218 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:25:34,590 INFO L242 Difference]: Finished difference. Result has 269 places, 270 transitions, 812 flow [2022-07-13 22:25:34,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=812, PETRI_PLACES=269, PETRI_TRANSITIONS=270} [2022-07-13 22:25:34,591 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 28 predicate places. [2022-07-13 22:25:34,591 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 270 transitions, 812 flow [2022-07-13 22:25:34,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 214.6) internal successors, (1073), 5 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:34,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:34,592 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] [2022-07-13 22:25:34,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:25:34,592 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 22:25:34,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1765536420, now seen corresponding path program 2 times [2022-07-13 22:25:34,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:34,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958995992] [2022-07-13 22:25:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:34,732 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 22:25:34,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:34,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958995992] [2022-07-13 22:25:34,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958995992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:34,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:34,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 22:25:34,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096633657] [2022-07-13 22:25:34,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:34,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:25:34,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:34,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:25:34,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:25:34,737 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 269 [2022-07-13 22:25:34,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 270 transitions, 812 flow. Second operand has 8 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:34,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:34,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 269 [2022-07-13 22:25:34,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:35,174 INFO L129 PetriNetUnfolder]: 370/2045 cut-off events. [2022-07-13 22:25:35,174 INFO L130 PetriNetUnfolder]: For 3721/3851 co-relation queries the response was YES. [2022-07-13 22:25:35,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3789 conditions, 2045 events. 370/2045 cut-off events. For 3721/3851 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 14770 event pairs, 176 based on Foata normal form. 110/2004 useless extension candidates. Maximal degree in co-relation 3769. Up to 477 conditions per place. [2022-07-13 22:25:35,186 INFO L132 encePairwiseOnDemand]: 257/269 looper letters, 71 selfloop transitions, 22 changer transitions 0/304 dead transitions. [2022-07-13 22:25:35,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 304 transitions, 1223 flow [2022-07-13 22:25:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 22:25:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 22:25:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2197 transitions. [2022-07-13 22:25:35,190 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.816728624535316 [2022-07-13 22:25:35,191 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2197 transitions. [2022-07-13 22:25:35,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2197 transitions. [2022-07-13 22:25:35,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:35,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2197 transitions. [2022-07-13 22:25:35,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 219.7) internal successors, (2197), 10 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:35,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 269.0) internal successors, (2959), 11 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:35,199 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 269.0) internal successors, (2959), 11 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:35,200 INFO L186 Difference]: Start difference. First operand has 269 places, 270 transitions, 812 flow. Second operand 10 states and 2197 transitions. [2022-07-13 22:25:35,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 304 transitions, 1223 flow [2022-07-13 22:25:35,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 304 transitions, 1205 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:25:35,207 INFO L242 Difference]: Finished difference. Result has 280 places, 273 transitions, 870 flow [2022-07-13 22:25:35,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=870, PETRI_PLACES=280, PETRI_TRANSITIONS=273} [2022-07-13 22:25:35,208 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 39 predicate places. [2022-07-13 22:25:35,208 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 273 transitions, 870 flow [2022-07-13 22:25:35,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:35,209 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:35,209 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] [2022-07-13 22:25:35,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:25:35,210 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 22:25:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash 171126792, now seen corresponding path program 1 times [2022-07-13 22:25:35,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:35,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135766767] [2022-07-13 22:25:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:35,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:35,312 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 22:25:35,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:35,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135766767] [2022-07-13 22:25:35,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135766767] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:35,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:35,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:25:35,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801526296] [2022-07-13 22:25:35,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:35,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:25:35,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:25:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:25:35,318 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-13 22:25:35,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 273 transitions, 870 flow. Second operand has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:35,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:35,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-13 22:25:35,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:35,738 INFO L129 PetriNetUnfolder]: 640/3292 cut-off events. [2022-07-13 22:25:35,738 INFO L130 PetriNetUnfolder]: For 4402/4411 co-relation queries the response was YES. [2022-07-13 22:25:35,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6373 conditions, 3292 events. 640/3292 cut-off events. For 4402/4411 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 26781 event pairs, 329 based on Foata normal form. 9/3077 useless extension candidates. Maximal degree in co-relation 6350. Up to 587 conditions per place. [2022-07-13 22:25:35,758 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 116 selfloop transitions, 28 changer transitions 0/344 dead transitions. [2022-07-13 22:25:35,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 344 transitions, 1449 flow [2022-07-13 22:25:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:25:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:25:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1374 transitions. [2022-07-13 22:25:35,761 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8513011152416357 [2022-07-13 22:25:35,761 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1374 transitions. [2022-07-13 22:25:35,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1374 transitions. [2022-07-13 22:25:35,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:35,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1374 transitions. [2022-07-13 22:25:35,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:35,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:35,768 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:35,768 INFO L186 Difference]: Start difference. First operand has 280 places, 273 transitions, 870 flow. Second operand 6 states and 1374 transitions. [2022-07-13 22:25:35,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 344 transitions, 1449 flow [2022-07-13 22:25:35,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 344 transitions, 1410 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-13 22:25:35,781 INFO L242 Difference]: Finished difference. Result has 283 places, 284 transitions, 1020 flow [2022-07-13 22:25:35,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1020, PETRI_PLACES=283, PETRI_TRANSITIONS=284} [2022-07-13 22:25:35,783 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 42 predicate places. [2022-07-13 22:25:35,783 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 284 transitions, 1020 flow [2022-07-13 22:25:35,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:35,784 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:35,784 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] [2022-07-13 22:25:35,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:25:35,785 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 22:25:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:35,785 INFO L85 PathProgramCache]: Analyzing trace with hash 279090622, now seen corresponding path program 2 times [2022-07-13 22:25:35,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:35,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447524037] [2022-07-13 22:25:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:35,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:35,926 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 22:25:35,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:35,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447524037] [2022-07-13 22:25:35,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447524037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:35,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:35,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:25:35,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518125744] [2022-07-13 22:25:35,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:35,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:25:35,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:35,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:25:35,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:25:35,929 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-13 22:25:35,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 284 transitions, 1020 flow. Second operand has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:35,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:35,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-13 22:25:35,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:36,418 INFO L129 PetriNetUnfolder]: 608/3051 cut-off events. [2022-07-13 22:25:36,419 INFO L130 PetriNetUnfolder]: For 4387/4389 co-relation queries the response was YES. [2022-07-13 22:25:36,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6134 conditions, 3051 events. 608/3051 cut-off events. For 4387/4389 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 24248 event pairs, 285 based on Foata normal form. 4/2832 useless extension candidates. Maximal degree in co-relation 6107. Up to 587 conditions per place. [2022-07-13 22:25:36,443 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 102 selfloop transitions, 27 changer transitions 0/329 dead transitions. [2022-07-13 22:25:36,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 329 transitions, 1406 flow [2022-07-13 22:25:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:25:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:25:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1148 transitions. [2022-07-13 22:25:36,446 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8535315985130112 [2022-07-13 22:25:36,446 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1148 transitions. [2022-07-13 22:25:36,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1148 transitions. [2022-07-13 22:25:36,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:36,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1148 transitions. [2022-07-13 22:25:36,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.6) internal successors, (1148), 5 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:36,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:36,452 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:36,452 INFO L186 Difference]: Start difference. First operand has 283 places, 284 transitions, 1020 flow. Second operand 5 states and 1148 transitions. [2022-07-13 22:25:36,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 329 transitions, 1406 flow [2022-07-13 22:25:36,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 329 transitions, 1382 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-13 22:25:36,468 INFO L242 Difference]: Finished difference. Result has 287 places, 284 transitions, 1055 flow [2022-07-13 22:25:36,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1055, PETRI_PLACES=287, PETRI_TRANSITIONS=284} [2022-07-13 22:25:36,469 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 46 predicate places. [2022-07-13 22:25:36,469 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 284 transitions, 1055 flow [2022-07-13 22:25:36,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:36,470 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:36,470 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] [2022-07-13 22:25:36,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:25:36,471 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 22:25:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash -109315002, now seen corresponding path program 3 times [2022-07-13 22:25:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:36,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122506310] [2022-07-13 22:25:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:36,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:36,590 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 22:25:36,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:36,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122506310] [2022-07-13 22:25:36,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122506310] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:36,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:36,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:25:36,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545826787] [2022-07-13 22:25:36,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:36,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:25:36,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:36,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:25:36,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:25:36,593 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-13 22:25:36,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 284 transitions, 1055 flow. Second operand has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:36,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:36,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-13 22:25:36,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:36,999 INFO L129 PetriNetUnfolder]: 675/3430 cut-off events. [2022-07-13 22:25:36,999 INFO L130 PetriNetUnfolder]: For 5366/5376 co-relation queries the response was YES. [2022-07-13 22:25:37,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6835 conditions, 3430 events. 675/3430 cut-off events. For 5366/5376 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 28228 event pairs, 377 based on Foata normal form. 16/3207 useless extension candidates. Maximal degree in co-relation 6807. Up to 959 conditions per place. [2022-07-13 22:25:37,027 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 98 selfloop transitions, 26 changer transitions 0/324 dead transitions. [2022-07-13 22:25:37,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 324 transitions, 1490 flow [2022-07-13 22:25:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:25:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:25:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1354 transitions. [2022-07-13 22:25:37,030 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.838909541511772 [2022-07-13 22:25:37,030 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1354 transitions. [2022-07-13 22:25:37,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1354 transitions. [2022-07-13 22:25:37,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:37,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1354 transitions. [2022-07-13 22:25:37,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 225.66666666666666) internal successors, (1354), 6 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:37,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:37,035 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:37,036 INFO L186 Difference]: Start difference. First operand has 287 places, 284 transitions, 1055 flow. Second operand 6 states and 1354 transitions. [2022-07-13 22:25:37,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 324 transitions, 1490 flow [2022-07-13 22:25:37,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 324 transitions, 1433 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-13 22:25:37,053 INFO L242 Difference]: Finished difference. Result has 290 places, 290 transitions, 1125 flow [2022-07-13 22:25:37,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1125, PETRI_PLACES=290, PETRI_TRANSITIONS=290} [2022-07-13 22:25:37,054 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 49 predicate places. [2022-07-13 22:25:37,054 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 290 transitions, 1125 flow [2022-07-13 22:25:37,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:37,055 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:37,055 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] [2022-07-13 22:25:37,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 22:25:37,056 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 22:25:37,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:37,056 INFO L85 PathProgramCache]: Analyzing trace with hash 826439992, now seen corresponding path program 4 times [2022-07-13 22:25:37,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:37,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279749949] [2022-07-13 22:25:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:37,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:37,145 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 22:25:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279749949] [2022-07-13 22:25:37,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279749949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:37,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:37,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:25:37,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219669408] [2022-07-13 22:25:37,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:37,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:25:37,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:37,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:25:37,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:25:37,152 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-13 22:25:37,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 290 transitions, 1125 flow. Second operand has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:37,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:37,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-13 22:25:37,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:37,493 INFO L129 PetriNetUnfolder]: 659/3303 cut-off events. [2022-07-13 22:25:37,494 INFO L130 PetriNetUnfolder]: For 4929/4941 co-relation queries the response was YES. [2022-07-13 22:25:37,508 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6578 conditions, 3303 events. 659/3303 cut-off events. For 4929/4941 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 26622 event pairs, 400 based on Foata normal form. 12/3081 useless extension candidates. Maximal degree in co-relation 6550. Up to 1014 conditions per place. [2022-07-13 22:25:37,519 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 84 selfloop transitions, 22 changer transitions 0/306 dead transitions. [2022-07-13 22:25:37,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 306 transitions, 1393 flow [2022-07-13 22:25:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:25:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:25:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1124 transitions. [2022-07-13 22:25:37,522 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8356877323420074 [2022-07-13 22:25:37,522 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1124 transitions. [2022-07-13 22:25:37,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1124 transitions. [2022-07-13 22:25:37,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:37,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1124 transitions. [2022-07-13 22:25:37,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 224.8) internal successors, (1124), 5 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:37,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:37,526 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:37,526 INFO L186 Difference]: Start difference. First operand has 290 places, 290 transitions, 1125 flow. Second operand 5 states and 1124 transitions. [2022-07-13 22:25:37,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 306 transitions, 1393 flow [2022-07-13 22:25:37,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 306 transitions, 1340 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-13 22:25:37,541 INFO L242 Difference]: Finished difference. Result has 290 places, 289 transitions, 1104 flow [2022-07-13 22:25:37,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1104, PETRI_PLACES=290, PETRI_TRANSITIONS=289} [2022-07-13 22:25:37,542 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 49 predicate places. [2022-07-13 22:25:37,542 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 289 transitions, 1104 flow [2022-07-13 22:25:37,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:37,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:37,543 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] [2022-07-13 22:25:37,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 22:25:37,543 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 22:25:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1687567350, now seen corresponding path program 5 times [2022-07-13 22:25:37,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:37,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896759133] [2022-07-13 22:25:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:37,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:37,657 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 22:25:37,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:37,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896759133] [2022-07-13 22:25:37,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896759133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:37,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:37,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:25:37,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356841759] [2022-07-13 22:25:37,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:37,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:25:37,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:37,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:25:37,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:25:37,660 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-13 22:25:37,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 289 transitions, 1104 flow. Second operand has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:37,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:37,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-13 22:25:37,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:38,065 INFO L129 PetriNetUnfolder]: 693/3479 cut-off events. [2022-07-13 22:25:38,065 INFO L130 PetriNetUnfolder]: For 5355/5365 co-relation queries the response was YES. [2022-07-13 22:25:38,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 3479 events. 693/3479 cut-off events. For 5355/5365 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 28567 event pairs, 407 based on Foata normal form. 16/3251 useless extension candidates. Maximal degree in co-relation 6843. Up to 1025 conditions per place. [2022-07-13 22:25:38,091 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 98 selfloop transitions, 23 changer transitions 0/321 dead transitions. [2022-07-13 22:25:38,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 321 transitions, 1513 flow [2022-07-13 22:25:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:25:38,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:25:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1345 transitions. [2022-07-13 22:25:38,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-07-13 22:25:38,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1345 transitions. [2022-07-13 22:25:38,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1345 transitions. [2022-07-13 22:25:38,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:38,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1345 transitions. [2022-07-13 22:25:38,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 224.16666666666666) internal successors, (1345), 6 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:38,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:38,100 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:38,100 INFO L186 Difference]: Start difference. First operand has 290 places, 289 transitions, 1104 flow. Second operand 6 states and 1345 transitions. [2022-07-13 22:25:38,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 321 transitions, 1513 flow [2022-07-13 22:25:38,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 321 transitions, 1466 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-07-13 22:25:38,115 INFO L242 Difference]: Finished difference. Result has 292 places, 292 transitions, 1147 flow [2022-07-13 22:25:38,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1147, PETRI_PLACES=292, PETRI_TRANSITIONS=292} [2022-07-13 22:25:38,116 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 51 predicate places. [2022-07-13 22:25:38,116 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 292 transitions, 1147 flow [2022-07-13 22:25:38,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:38,117 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:38,117 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] [2022-07-13 22:25:38,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 22:25:38,117 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:25:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:38,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1951714480, now seen corresponding path program 6 times [2022-07-13 22:25:38,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:38,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309376100] [2022-07-13 22:25:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:38,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:38,205 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 22:25:38,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:38,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309376100] [2022-07-13 22:25:38,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309376100] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:38,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:25:38,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:25:38,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872267612] [2022-07-13 22:25:38,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:38,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:25:38,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:38,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:25:38,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:25:38,208 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-13 22:25:38,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 292 transitions, 1147 flow. Second operand has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:38,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:38,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-13 22:25:38,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:38,603 INFO L129 PetriNetUnfolder]: 685/3459 cut-off events. [2022-07-13 22:25:38,603 INFO L130 PetriNetUnfolder]: For 5225/5231 co-relation queries the response was YES. [2022-07-13 22:25:38,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6780 conditions, 3459 events. 685/3459 cut-off events. For 5225/5231 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 28596 event pairs, 317 based on Foata normal form. 12/3232 useless extension candidates. Maximal degree in co-relation 6754. Up to 669 conditions per place. [2022-07-13 22:25:38,627 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 104 selfloop transitions, 29 changer transitions 0/333 dead transitions. [2022-07-13 22:25:38,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 333 transitions, 1584 flow [2022-07-13 22:25:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:25:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:25:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1573 transitions. [2022-07-13 22:25:38,630 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8353690918746681 [2022-07-13 22:25:38,630 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1573 transitions. [2022-07-13 22:25:38,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1573 transitions. [2022-07-13 22:25:38,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:38,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1573 transitions. [2022-07-13 22:25:38,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 224.71428571428572) internal successors, (1573), 7 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:38,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 269.0) internal successors, (2152), 8 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:38,635 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 269.0) internal successors, (2152), 8 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:38,635 INFO L186 Difference]: Start difference. First operand has 292 places, 292 transitions, 1147 flow. Second operand 7 states and 1573 transitions. [2022-07-13 22:25:38,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 333 transitions, 1584 flow [2022-07-13 22:25:38,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 333 transitions, 1537 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-13 22:25:38,649 INFO L242 Difference]: Finished difference. Result has 294 places, 291 transitions, 1135 flow [2022-07-13 22:25:38,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1135, PETRI_PLACES=294, PETRI_TRANSITIONS=291} [2022-07-13 22:25:38,650 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 53 predicate places. [2022-07-13 22:25:38,650 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 291 transitions, 1135 flow [2022-07-13 22:25:38,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:38,651 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:38,651 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] [2022-07-13 22:25:38,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 22:25:38,651 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:25:38,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:38,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1593733263, now seen corresponding path program 1 times [2022-07-13 22:25:38,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:38,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183484003] [2022-07-13 22:25:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:38,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:25:38,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:38,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183484003] [2022-07-13 22:25:38,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183484003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:25:38,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76923010] [2022-07-13 22:25:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:38,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:38,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:25:38,767 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 22:25:38,803 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 22:25:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:38,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:25:38,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:25:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:25:39,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:25:39,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76923010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:25:39,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:25:39,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-07-13 22:25:39,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111744810] [2022-07-13 22:25:39,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:25:39,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:25:39,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:39,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:25:39,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:25:39,070 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 269 [2022-07-13 22:25:39,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 291 transitions, 1135 flow. Second operand has 8 states, 8 states have (on average 189.5) internal successors, (1516), 8 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:39,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:39,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 269 [2022-07-13 22:25:39,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:39,495 INFO L129 PetriNetUnfolder]: 511/2593 cut-off events. [2022-07-13 22:25:39,495 INFO L130 PetriNetUnfolder]: For 1513/1527 co-relation queries the response was YES. [2022-07-13 22:25:39,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4549 conditions, 2593 events. 511/2593 cut-off events. For 1513/1527 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 21014 event pairs, 277 based on Foata normal form. 12/2414 useless extension candidates. Maximal degree in co-relation 4524. Up to 762 conditions per place. [2022-07-13 22:25:39,519 INFO L132 encePairwiseOnDemand]: 247/269 looper letters, 55 selfloop transitions, 15 changer transitions 18/314 dead transitions. [2022-07-13 22:25:39,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 314 transitions, 1363 flow [2022-07-13 22:25:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 22:25:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 22:25:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1950 transitions. [2022-07-13 22:25:39,523 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.724907063197026 [2022-07-13 22:25:39,523 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1950 transitions. [2022-07-13 22:25:39,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1950 transitions. [2022-07-13 22:25:39,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:39,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1950 transitions. [2022-07-13 22:25:39,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 195.0) internal successors, (1950), 10 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:39,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 269.0) internal successors, (2959), 11 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:39,529 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 269.0) internal successors, (2959), 11 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:39,529 INFO L186 Difference]: Start difference. First operand has 294 places, 291 transitions, 1135 flow. Second operand 10 states and 1950 transitions. [2022-07-13 22:25:39,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 314 transitions, 1363 flow [2022-07-13 22:25:39,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 314 transitions, 1286 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-07-13 22:25:39,541 INFO L242 Difference]: Finished difference. Result has 301 places, 292 transitions, 1108 flow [2022-07-13 22:25:39,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1108, PETRI_PLACES=301, PETRI_TRANSITIONS=292} [2022-07-13 22:25:39,543 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 60 predicate places. [2022-07-13 22:25:39,543 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 292 transitions, 1108 flow [2022-07-13 22:25:39,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.5) internal successors, (1516), 8 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:39,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:39,543 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] [2022-07-13 22:25:39,563 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 22:25:39,763 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,SelfDestructingSolverStorable12 [2022-07-13 22:25:39,764 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:25:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1256825081, now seen corresponding path program 1 times [2022-07-13 22:25:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:39,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518965927] [2022-07-13 22:25:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:39,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:39,972 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 22:25:39,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:39,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518965927] [2022-07-13 22:25:39,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518965927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:25:39,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782330539] [2022-07-13 22:25:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:39,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:39,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:25:39,986 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 22:25:39,988 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 22:25:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:40,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 22:25:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:25:40,601 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-13 22:25:40,602 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 19 treesize of output 10 [2022-07-13 22:25:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:25:40,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:25:41,163 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:25:41,163 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 19 treesize of output 11 [2022-07-13 22:25:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:25:41,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782330539] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:25:41,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:25:41,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 18] total 36 [2022-07-13 22:25:41,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28057807] [2022-07-13 22:25:41,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:25:41,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-13 22:25:41,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:41,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-13 22:25:41,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2022-07-13 22:25:41,675 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 269 [2022-07-13 22:25:41,677 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 292 transitions, 1108 flow. Second operand has 36 states, 36 states have (on average 105.41666666666667) internal successors, (3795), 36 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:41,677 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:41,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 269 [2022-07-13 22:25:41,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:03,596 INFO L129 PetriNetUnfolder]: 33764/71687 cut-off events. [2022-07-13 22:26:03,596 INFO L130 PetriNetUnfolder]: For 76370/76458 co-relation queries the response was YES. [2022-07-13 22:26:04,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164649 conditions, 71687 events. 33764/71687 cut-off events. For 76370/76458 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 759128 event pairs, 1109 based on Foata normal form. 170/70304 useless extension candidates. Maximal degree in co-relation 164621. Up to 10962 conditions per place. [2022-07-13 22:26:04,477 INFO L132 encePairwiseOnDemand]: 191/269 looper letters, 2380 selfloop transitions, 592 changer transitions 473/3537 dead transitions. [2022-07-13 22:26:04,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 3537 transitions, 19241 flow [2022-07-13 22:26:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-07-13 22:26:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2022-07-13 22:26:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 21758 transitions. [2022-07-13 22:26:04,512 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4302380764059163 [2022-07-13 22:26:04,513 INFO L72 ComplementDD]: Start complementDD. Operand 188 states and 21758 transitions. [2022-07-13 22:26:04,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 188 states and 21758 transitions. [2022-07-13 22:26:04,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:04,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 188 states and 21758 transitions. [2022-07-13 22:26:04,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 189 states, 188 states have (on average 115.73404255319149) internal successors, (21758), 188 states have internal predecessors, (21758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:04,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 189 states, 189 states have (on average 269.0) internal successors, (50841), 189 states have internal predecessors, (50841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:04,632 INFO L81 ComplementDD]: Finished complementDD. Result has 189 states, 189 states have (on average 269.0) internal successors, (50841), 189 states have internal predecessors, (50841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:04,632 INFO L186 Difference]: Start difference. First operand has 301 places, 292 transitions, 1108 flow. Second operand 188 states and 21758 transitions. [2022-07-13 22:26:04,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 3537 transitions, 19241 flow [2022-07-13 22:26:05,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 3537 transitions, 18407 flow, removed 288 selfloop flow, removed 7 redundant places. [2022-07-13 22:26:05,402 INFO L242 Difference]: Finished difference. Result has 598 places, 901 transitions, 6589 flow [2022-07-13 22:26:05,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=188, PETRI_FLOW=6589, PETRI_PLACES=598, PETRI_TRANSITIONS=901} [2022-07-13 22:26:05,403 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 357 predicate places. [2022-07-13 22:26:05,403 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 901 transitions, 6589 flow [2022-07-13 22:26:05,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 105.41666666666667) internal successors, (3795), 36 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:05,404 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:05,404 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] [2022-07-13 22:26:05,424 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 22:26:05,619 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,SelfDestructingSolverStorable13 [2022-07-13 22:26:05,620 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:05,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1477762169, now seen corresponding path program 2 times [2022-07-13 22:26:05,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:05,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021902001] [2022-07-13 22:26:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:05,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:26:05,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:05,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021902001] [2022-07-13 22:26:05,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021902001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:05,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:05,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 22:26:05,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713614325] [2022-07-13 22:26:05,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:05,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:26:05,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:05,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:26:05,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-13 22:26:05,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 269 [2022-07-13 22:26:05,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 901 transitions, 6589 flow. Second operand has 11 states, 11 states have (on average 210.36363636363637) internal successors, (2314), 11 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 22:26:05,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:05,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 269 [2022-07-13 22:26:05,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:11,178 INFO L129 PetriNetUnfolder]: 3629/15604 cut-off events. [2022-07-13 22:26:11,178 INFO L130 PetriNetUnfolder]: For 122063/122563 co-relation queries the response was YES. [2022-07-13 22:26:11,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56688 conditions, 15604 events. 3629/15604 cut-off events. For 122063/122563 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 170724 event pairs, 1208 based on Foata normal form. 107/15149 useless extension candidates. Maximal degree in co-relation 56543. Up to 2787 conditions per place. [2022-07-13 22:26:11,423 INFO L132 encePairwiseOnDemand]: 253/269 looper letters, 282 selfloop transitions, 228 changer transitions 0/1089 dead transitions. [2022-07-13 22:26:11,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1089 transitions, 8786 flow [2022-07-13 22:26:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 22:26:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-13 22:26:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3278 transitions. [2022-07-13 22:26:11,427 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8123915737298637 [2022-07-13 22:26:11,427 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3278 transitions. [2022-07-13 22:26:11,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3278 transitions. [2022-07-13 22:26:11,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:11,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3278 transitions. [2022-07-13 22:26:11,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 218.53333333333333) internal successors, (3278), 15 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:11,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 269.0) internal successors, (4304), 16 states have internal predecessors, (4304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:11,434 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 269.0) internal successors, (4304), 16 states have internal predecessors, (4304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:11,434 INFO L186 Difference]: Start difference. First operand has 598 places, 901 transitions, 6589 flow. Second operand 15 states and 3278 transitions. [2022-07-13 22:26:11,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1089 transitions, 8786 flow [2022-07-13 22:26:12,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1089 transitions, 8600 flow, removed 50 selfloop flow, removed 18 redundant places. [2022-07-13 22:26:12,036 INFO L242 Difference]: Finished difference. Result has 545 places, 937 transitions, 7381 flow [2022-07-13 22:26:12,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=6461, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7381, PETRI_PLACES=545, PETRI_TRANSITIONS=937} [2022-07-13 22:26:12,037 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 304 predicate places. [2022-07-13 22:26:12,037 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 937 transitions, 7381 flow [2022-07-13 22:26:12,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 210.36363636363637) internal successors, (2314), 11 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 22:26:12,038 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:12,038 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] [2022-07-13 22:26:12,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 22:26:12,038 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:12,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1542483443, now seen corresponding path program 3 times [2022-07-13 22:26:12,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:12,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353104998] [2022-07-13 22:26:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:12,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:12,262 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 22:26:12,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:12,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353104998] [2022-07-13 22:26:12,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353104998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:12,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106133157] [2022-07-13 22:26:12,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:26:12,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:12,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:12,268 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 22:26:12,271 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 22:26:12,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:26:12,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:26:12,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 22:26:12,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:12,736 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 22:26:12,965 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 22:26:13,019 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 22:26:13,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:26:13,358 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:26:13,359 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 17 treesize of output 10 [2022-07-13 22:26:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:13,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:14,470 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:26:14,471 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 55 treesize of output 44 [2022-07-13 22:26:14,481 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:26:14,481 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 94 treesize of output 85 [2022-07-13 22:26:14,491 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:26:14,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2022-07-13 22:26:14,503 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:26:14,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2022-07-13 22:26:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:14,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106133157] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:14,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:14,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 27, 24] total 51 [2022-07-13 22:26:14,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669535217] [2022-07-13 22:26:14,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:14,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-13 22:26:14,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:14,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-13 22:26:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2254, Unknown=60, NotChecked=0, Total=2550 [2022-07-13 22:26:14,837 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 269 [2022-07-13 22:26:14,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 937 transitions, 7381 flow. Second operand has 51 states, 51 states have (on average 90.07843137254902) internal successors, (4594), 51 states have internal predecessors, (4594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:14,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:14,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 269 [2022-07-13 22:26:14,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand